Re: BITX ver 5 Display Problem
Dennis, Rereading my post, it may not have been clear on how the 12volts get to the Raduino board, it is coming in on pins 15 and 16 of the header between the Raduino and the large motherboard. The pins on an LM7805 are:  73 Evan AC9TU
|
Re: Farhan's Analog Again The Daylight Radio
Hello Paolo, There are SMT packages of the J310 which have a part number:?SMPJ310
Here is Mouser for EU?
When searching, search using: 310 JFET Transistor
or: 310 JFET
I recently got a cheap US$9 SMT Practice Solder Board from Amazon.com.? Gikfun.? ?This is so I could practice soldering SMT parts.??
Other places that have the J310 through-hole part listed.??
Mouser will be getting some J310 in SMT packages in the next month or 2 or 3.
Newark will be getting some J310 in SMT packages in the next month or 2 or 3.
Does anybody know what JFETs that are not a J310 that can be a drop in replacement?
Can you use a J309 instead of a J310?
Here are J309 in stock in a SMT package at DigiKey
I know a design for the Norcal 40A used a JFET PN4416 and another design used a MPF102 and a later design by Wilderness Radio used a J309 which was later substituted with a J310 for the QRP Tech 25th Anniversary Edition because the through-hole J309 became unavailable at the time.
So, could a J309, MPF102, or PN4416 JFET be used instead of a J310?
As for 2N2222, like Ashhar said, you can use 2N3904 instead.
Or you can use PN2222A.? And I think MPS2222A as well?
73 Daniel KK4MRN
On Friday, June 17, 2022, 06:52:45 AM EDT, Paul Allison <paolo.airasca@...> wrote:
Sorry, please delete last mail
Here in europe j310 and 2n2222 are "obsolete" and no more selled
by big companys.
Expedition costs are expensive, Mouser 20 euro, Digi-key 18 euro,
etc.
It is a big idea to buy everything needed by a single seller:
what do you suggest?
Thank you
Paolo
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
Re: BITX ver 5 Display Problem
Evan, thanks for the info. I knew about the regulator. I? wanted to know the power input pins to confirm a possible bad regulator. When I received?my kit the? regulator was bent down almost?flush with the board surface.? I gently straightened it back up. I checked the leads with a strong light and magnifying glass looking for cracks but none apparent. I will check voltages again. Thanks Dennis
On Thu, Jun 16, 2022 at 11:27 AM Evan Hand < elhandjr@...> wrote: Dennis,
The display gets its power from the 5volt regulator on the Raduino board.? That is powered from the 12volts through pins 15 and 16 on the main display board.
I would verify the in and out voltages on the LM7805 regulator on the Raduino board.
73
Evan
AC9TU
|
Re: Farhan's Analog Again The Daylight Radio
I really like this design - simple, but high performance.
I apologize if this has already been mentioned, but I don't see it in the thread here.? One error that I believe I'm seeing (or, at least, something that might trip up folks trying to build at home) - RL1 appears to have reversed behavior from RL2 and RL3.? That is, RL1 is shown to be in the TX state with the relay's NC state, whereas RL2 and RL3 are in RX in the relay's NC state.? I'm assuming that RL1 is intended to be driven with the TX net for consistency with RL2, but as currently drawn you would want to drive it with RX I believe - or else the first receive mixer would be switched out of the signal chain on receive.
73, Josh, KB8NYP
On Fri, Jun 3, 2022 at 1:55 AM Ashhar Farhan < farhanbox@...> wrote: Pete and others who requested the circuit, here it is: 1. The circuit is still to evolve into a CW/SSB transceiver, at present it is only SSB. 2. The relay used to switch the crystal and low-pass filters can be replaced with some tricky but simple electronic T/R. I just took the simple route out. .3 The PA + driver are the only places?where bifilar transformers are used, I will eliminate that as well.? The write-up is still being edited on?, I publish it on when I am done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton < zx97lite@...> wrote:
Hi Farhan,
Any luck finding the Daylight Radio schematic.
Thanks!
Pete? WB9FLW
On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete Eaton < zx97lite@...> wrote:
No problem Farhan, appreciate you doing this for me.
Have a safe trip home.
Pete? WB9FLW
On Tuesday, May 24, 2022, 07:04:41 AM CDT, Ashhar Farhan < farhanbox@...> wrote:
Pete, I will, my thinkpad is acting up and I guess I will have to wait until I reach Hyderabad to fix it. - f On Mon, May 23, 2022, 5:14 AM Pete Eaton < zx97lite@...> wrote:
Hi Farhan,
Are you still going to send the Circuit Diagram.
If not I totally understand and will wait for the FDIM Proceedings to get here.
Thanks!
Pete? WB9FLW
On Saturday, May 21, 2022, 04:12:21 PM CDT, Pete Eaton < zx97lite@...> wrote:
Thanks, that would be *Great*
Pete
On Saturday, May 21, 2022, 04:06:38 PM CDT, Ashhar Farhan < farhanbox@...> wrote:
I guess I can send you the circuit diagram all the same On Sat, May 21, 2022, 4:20 PM Pete Eaton < zx97lite@...> wrote:
Hi Farhan,
I was on Zoom so I was taking notes as fast as I could during your talk.? Also took a mental snapshot of the Schematic.
Look forward to getting the Proceedings and your Paper.
Thanks for all you do!
Pete? WB9FLW?
P.S.?Big Cosby, Stills & Nash Fan here as well !
On Saturday, May 21, 2022, 03:02:42 PM CDT, Ashhar Farhan < farhanbox@...> wrote:
Pete, Thank you for summing it up.? "Daylight Again" is a cosby, still and nash song about the losses and memory. I thought it was appropriate for dayton after 2 years. The bandpass filter as well as the crystal filter is shared. I wrote the paper for thr FDIM. We will have to wait for them to publish it first. - f On Sat, May 21, 2022, 2:44 PM Pete Eaton < zx97lite@...> wrote: Hi Nigel,
Quick intro name is Pete, call WB9FLW, qth Maryville, IL USA.
For several years now I have wanted to build a BITX Rig from scratch. The Picture you put on of your 40 Meter Transceiver back in 2017 really caught my eye.
Farhan gave a wonderful presentation at FDIM on Thursday that really got my attention. His talk was on a new Analog Rig called "The Daylight Radio" (not really sure were the name came from).
Key Points:
* Hight Performance 7 MHz 5 Watt SSB Transceiver?
* Draws just 24 ma of Current
* 90 dB Dynamic Range, 80 dB close-in Dynamic Range
* 3 D Printed Rock Stable, Low Noise PTO
* Uses 3D Printed Air Core Toroids!
* Junk Box Parts
* Cost Less than $20 to Build
* Simple to Assemble
* Undo the Love - who needs 50 Ohms
* Uses 5 MHz QER Filter
* VFO is at a very low frequency of 2 MHz, able to decode FT8 Signals no Problem
* Receiver Mixers are pairs of JFET 310 in Cascode
* Active Devices 2n2222a, J310, IRF510
* IC's 5532A, NE602
* Uses a PTO, No Air Variable Caps or Vernier Dial Needed!
* PTO is Linear
* It is no more complicated that the BITX Rigs
This is *not* a Bi Directional aka BITX Rig. Only thing shared is the Crystal Filter. One can build the Receiver first, get it operating before constructing the Transmitter.
He finished the Rig just a few days ago and wrote the Paper on the Flight coming over here, it should be posted on in a few days.
I thought I would contact Folks that I thought might me interested thus this Email to you.
When I get any more info from Farhan I will forward it to you asap.
Will try to stir up some more interest.
Best Wishes,
Pete? WB9FLW
|
Re: Farhan's Analog Again The Daylight Radio
@Paul: "Here in europe j310 and 2n2222 are "obsolete"" and "High expedition costs"?
First, I think you should ask yourself why you want to have these semiconductors. If you look at the schematic (and as explained in the text), many other semiconductors could be used.
For I used 2N3904.
These or other 'general purpose NPN transistors' are maybe even already present in your shack or at a colleague amateur that has them once purchased. Via AliExpress these kind of components costs less then a few Euro's per 100 pcs, including transport and tax. If you do not have the J310 (or other fets!) you could even consider ordering dual gate mosfets.
May be it is a good idea to make others enthusiastic to build this (or another) transceiver and build together. Then the component costs are further reduced and you can support each other.
|
Re: Farhan's Analog Again The Daylight Radio
Greetings I also ordered metal can versions of 2n2222 from Mouser at the end of May, to sub on the uBitx.? Inexpensive and readily available. 73 Art N9AEP
On Fri, Jun 17, 2022 at 8:37 AM Ashhar Farhan < farhanbox@...> wrote: Mouser sells j310s. The smt versions are very inexpensive.?
Sorry, please delete last mail
Here in europe j310 and 2n2222 are "obsolete" and no more selled
by big companys.
Expedition costs are expensive, Mouser 20 euro, Digi-key 18 euro,
etc.
It is a big idea to buy everything needed by a single seller:
what do you suggest?
Thank you
Paolo
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
Re: Farhan's Analog Again The Daylight Radio
Whoops, I just?saw the prices on mouser. They are horribly expensive. On ebay, chinese sellers are shipping five two dollars.
You can use any other npnp transistor like 2N3904 in place of the 2N2222A - f
Mouser sells j310s. The smt versions are very inexpensive.?
Sorry, please delete last mail
Here in europe j310 and 2n2222 are "obsolete" and no more selled
by big companys.
Expedition costs are expensive, Mouser 20 euro, Digi-key 18 euro,
etc.
It is a big idea to buy everything needed by a single seller:
what do you suggest?
Thank you
Paolo
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
Re: Farhan's Analog Again The Daylight Radio
Mouser sells j310s. The smt versions are very inexpensive.?
Sorry, please delete last mail
Here in europe j310 and 2n2222 are "obsolete" and no more selled
by big companys.
Expedition costs are expensive, Mouser 20 euro, Digi-key 18 euro,
etc.
It is a big idea to buy everything needed by a single seller:
what do you suggest?
Thank you
Paolo
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
Re: Farhan's Analog Again The Daylight Radio
Sorry, please delete last mail
Here in europe j310 and 2n2222 are "obsolete" and no more selled
by big companys.
Expedition costs are expensive, Mouser 20 euro, Digi-key 18 euro,
etc.
It is a big idea to buy everything needed by a single seller:
what do you suggest?
Thank you
Paolo
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
toggle quoted message
Show quoted text
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
Re: Farhan's Analog Again The Daylight Radio
Thank you, Farhan !
Small problem here in euro:
components are very low cost (when available, 2n2222 and j310 are
"obsolete" and no more available from big sellers9
pe
Il 15/06/2022 15:39, Ashhar Farhan ha
scritto:
toggle quoted message
Show quoted text
Paulo,
Just wait a week. I am almost done with the
write up
Paulo,
Connect Q11 collector to the junction of R45 and R48.
Connect the open end of R51 to TX line.
In 602 the OUT-B is pin 5
Audio is for phones only.
Raj
On 15/06/2022 4:12 PM, Paul Allison wrote:
Hi,
I'm building "allanalog" with 1206 smd components on a
? cnc milled pcb ( Easyeda, Flatcam, very old? cncusb ,
all freeware )
All the circuit except BPF, LPF and power rf section
are on a 86x66mm pcb, ( VFO 32x16mm) non the smallest
possible,
but I'm a 66 y. o. amateur, not 007......Some
questions:
really collector of Q11 is not connected? Why?
On SA602 there are two pins named "2" I suppose non
connected are pins "5": right?
On audio output is there enough power for a loudspeaker
or only for an headphone?
I do not have a 3d cnc, only a cnc milling machine: are
toroid made of plastic? Dimensions?
2.15uH are 32.8T......2uH 31.6T....1.6uH 28.3T ?
Will someone sell the 3d cnc part of the VFO ?
Thank you
Paolo from Italy
Il 03/06/2022 12:57, Raj vu2zap ha scritto:
Q11 collector not connected
Farhan.
Raj
At 03/06/2022, you wrote:
Pete and others who requested
the circuit, here it is:
1. The circuit is still to evolve into a CW/SSB
transceiver, at present it is only SSB.
2. The relay used to switch the crystal and low-pass
filters can be replaced with some tricky but simple
electronic T/R. I just took the simple route out.
.3 The PA + driver are the only places? where bifilar
transformers are used, I will eliminate that as well.?
The write-up is still being edited on?
, I publish it on when I am
done.
On Fri, May 27, 2022 at 2:12 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Any luck finding the Daylight Radio schematic.
- Thanks!
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:29:08 AM CDT, Pete
Eaton <zx97lite@...>
wrote:
- No problem Farhan, appreciate you doing this for
me.
- Have a safe trip home.
- Pete?? WB9FLW
- On Tuesday, May 24, 2022, 07:04:41 AM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- I will, my thinkpad is acting up and I guess I
will have to wait until I reach Hyderabad to fix
it.
- - f
- On Mon, May 23, 2022, 5:14 AM Pete Eaton <zx97lite@...>
wrote:
- Hi Farhan,
- Are you still going to send the Circuit
Diagram.
- If not I totally understand and will wait
for the FDIM Proceedings to get here.
- Thanks!
- Pete?? WB9FLW
- On Saturday, May 21, 2022, 04:12:21 PM CDT,
Pete Eaton <zx97lite@...>
wrote:
- Thanks, that would be *Great*
- Pete
- On Saturday, May 21, 2022, 04:06:38 PM CDT,
Ashhar Farhan <farhanbox@...>
wrote:
- I guess I can send you the circuit diagram
all the same
- On Sat, May 21, 2022, 4:20 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Farhan,
- I was on Zoom so I was taking notes as
fast as I could during your talk.?? Also
took a mental snapshot of the Schematic.
- Look forward to getting the Proceedings
and your Paper.
- Thanks for all you do!
- Pete?? WB9FLW?
- P.S.? Big Cosby, Stills & Nash Fan
here as well !
- On Saturday, May 21, 2022, 03:02:42 PM
CDT, Ashhar Farhan <farhanbox@...>
wrote:
- Pete,
- Thank you for summing it up.?? "Daylight
Again" is a cosby, still and nash song
about the losses and memory. I thought it
was appropriate for dayton after 2 years.
- The bandpass filter as well as the
crystal filter is shared.
- I wrote the paper for thr FDIM. We will
have to wait for them to publish it first.
- - f
- On Sat, May 21, 2022, 2:44 PM Pete Eaton
<zx97lite@...>
wrote:
- Hi Nigel,
- Quick intro name is Pete, call
WB9FLW, qth Maryville, IL USA.
- For several years now I have wanted
to build a BITX Rig from scratch. The
Picture you put on
of your 40 Meter Transceiver back in
2017 really caught my eye.
- Farhan gave a wonderful presentation
at FDIM on Thursday that really got my
attention. His talk was on a new
Analog Rig called "The Daylight Radio"
(not really sure were the name came
from).
- Key Points:
- * Hight Performance 7 MHz 5 Watt SSB
Transceiver?
- * Draws just 24 ma of Current
- * 90 dB Dynamic Range, 80 dB
close-in Dynamic Range
- * 3 D Printed Rock Stable, Low Noise
PTO
- * Uses 3D Printed Air Core Toroids!
- * Junk Box Parts
- * Cost Less than $20 to Build
- * Simple to Assemble
- * Undo the Love - who needs 50 Ohms
- * Uses 5 MHz QER Filter
- * VFO is at a very low frequency of
2 MHz, able to decode FT8 Signals no
Problem
- * Receiver Mixers are pairs of JFET
310 in Cascode
- * Active Devices 2n2222a, J310,
IRF510
- * IC's 5532A, NE602
- * Uses a PTO, No Air Variable Caps
or Vernier Dial Needed!
- * PTO is Linear
- * It is no more complicated that the
BITX Rigs
- This is *not* a Bi Directional aka
BITX Rig. Only thing shared is the
Crystal Filter. One can build the
Receiver first, get it operating
before constructing the Transmitter.
- He finished the Rig just a few days
ago and wrote the Paper on the Flight
coming over here, it should be posted
on
in a few days.
- I thought I would contact Folks that
I thought might me interested thus
this Email to you.
- When I get any more info from Farhan
I will forward it to you asap.
- Will try to stir up some more
interest.
- Best Wishes,
- Pete?? WB9FLW
|
On Sun, Jun 12, 2022 at 05:47 AM, Curt wrote:
I didn't watch video on that maxim product mentioned so I wonder how the microphone is bypassed. Seems like it has way too much gain for ubitx receive but I see it can be adjusted down by jumpers.?
Curt, bypassing the microphone is done by just desoldering and removing it. Gain could indeed be set by selection and it deliveres enough output to drive (via the volume level potmeter) the LM386.  It is just operating at audio level, good enough for me. It all has its limits. For who is interrested how I build my 6 meter transceiver; just publised a new episode: Enjoy the weekend, Chris PA3CRX
|
Re: ft8 interface connections
#ft8
Peeps, You give me more credit than is due. ubitx has been a community effort. The TIAs are due to Wes, the 45 MHz filters were recommended by Raj, Allison advised about the PA. There are so many who contribute to this day. My job is more like an editor than a writer. - f
Jonathan,
Yes Ashhar is really a master at building radios and we are lucky to have him as both designer and manufacturer .
In my own opinion, the ubitx is probably the best all band QRP transceiver since it can be modded,hacked and upgraded by the owner.
Thank you Ashhar!!!!!!!!
73 david ac9xh
On Thursday, June 16, 2022 at 07:40:35 AM EDT, Jonathan G5LUX < jratty@...> wrote:
Thank you for everyone who gave me pointers on this.
I ended up using just the USB sound dongle without any other interface - could receive happily, but no-one was hearing me, and PSK Reporter wasn't showing much in the way of reception. Tried various things, including checking the antenna SWR at the 20m FT8 frequency (around 1.3, so pretty good). I was just not being heard.?
In the end, we diagnosed a poor audio signal from the software as the most likely culprit, as everything else seemed to be working correctly. So I put the mic cable (modified to avoid the constant T/X, as advised) directly into the iMac's phones output and set for a really good output level.? Bingo! Suddenly I was being heard allover Europe & even had reports on PSK from Iceland & New York at 6600km. Then I made 4 QSOs in Germany & Netherlands within about 10 minutes. I don't doubt I should finesse the installation a little more, but right now, with two audio cables, a micro USB cable & a ?4 sound dongle, I have a working set-up.
These sets are amazing - thank you Ashhar!
73,
Jonathan
G5LUX
|
Rafael, I am on the other group and the ADX is yet another addition to the excellent QCX family of radios. The software is tricky but elegant!? I have a QDX which is similar.? - f
On Thu, Jun 16, 2022, 11:00 PM Rafael Diniz < rafael@...> wrote: Hi all,
Sorry the off-topic. You all probably already know ADX, but just in case:
It is very simple, but seems cool for digital modes using single tone,
and it is totally free and open source, just like the great uBitx!
Cheers,
Rafael PU2UIT
|
Re: ft8 interface connections
#ft8
Jonathan,
Yes Ashhar is really a master at building radios and we are lucky to have him as both designer and manufacturer .
In my own opinion, the ubitx is probably the best all band QRP transceiver since it can be modded,hacked and upgraded by the owner.
Thank you Ashhar!!!!!!!!
73 david ac9xh
On Thursday, June 16, 2022 at 07:40:35 AM EDT, Jonathan G5LUX <jratty@...> wrote:
Thank you for everyone who gave me pointers on this.
I ended up using just the USB sound dongle without any other interface - could receive happily, but no-one was hearing me, and PSK Reporter wasn't showing much in the way of reception. Tried various things, including checking the antenna SWR at the 20m FT8 frequency (around 1.3, so pretty good). I was just not being heard.?
In the end, we diagnosed a poor audio signal from the software as the most likely culprit, as everything else seemed to be working correctly. So I put the mic cable (modified to avoid the constant T/X, as advised) directly into the iMac's phones output and set for a really good output level. ?Bingo! Suddenly I was being heard allover Europe & even had reports on PSK from Iceland & New York at 6600km. Then I made 4 QSOs in Germany & Netherlands within about 10 minutes. I don't doubt I should finesse the installation a little more, but right now, with two audio cables, a micro USB cable & a ?4 sound dongle, I have a working set-up.
These sets are amazing - thank you Ashhar!
73,
Jonathan
G5LUX
|
Vic,
Glad you found the problem. ive seen alot of components break down under load,or in other terms under circuit operations. Before i was in engineering i worked as a depot repair tech. working on everything and anything. Most of the "dog" repairs as we techs call them,were either semiconductor failure under load or capacitor failure under load.
the failures were from the junction break downs, either BE, BC,or sometimes CE. these even tested good on the good transistor testers and also on a scope.Only when applying the required voltage and allowing current to be detected,in the circuit, would you see the breakdown of the signal from input to output.,and when said components were replaced, it solved the problem in a majority of cases.When current,or the pressure of the electron flow gets to a big enough pressure,you have punch thru on any or all junctions that were damaged from heavy static and or lightning.Sometimes you can pick this out with the component heating up,but alot of times the component will act like all the others off the shelf until put to the test.
73 David ac9xh
On Thursday, June 16, 2022 at 04:58:34 PM EDT, Vic WA4THR via groups.io <vhklein@...> wrote:
David, you win the prize! After confirming continuity right up the the leads of Q911/912, I pulled them from the circuit. Alas, they tested OK on the little transistor checker, so I confirmed that all the resistance values and circuit paths were OK and then installed 2 new 2N3904's after matching hfe values on the little tester (not really needed, but couldn't hurt). Surprise, output power has returned! The event that caused this had clearly taken Q90, and it did test bad after removal, but these 2 must be breaking down under load or something as you suggest. Power is only slightly less across the bands than before, but that could be that I am running slightly lower voltage to the finals today. While things were spread out across the bench I did remove the regulator circuit that was providing the lower power to the main board, but only after the transmitter repair was successful.
Evan, that RF probe you suggested has the identical circuit, including the component choices and values, to the one I cobbled up on the bench that helped trace the problem. Still, it is a much neater package than my perf board and clip leads, and quite inexpensive, so I have ordered one.
Thanks to you as well, Raj, for your suggestions. I was rocking T8 around and even bridging the capacitors with parallel? caps trying to get that signal to the next stage. The support from the community here is fantastic and I may have just chucked this thing without all the ideas, but it has been one of my favorite rigs and has traveled with me a lot, so I am glad to have it back and functional.
By the way, I also have a BitX40 and it blew a driver stage some years back because of being near a 500w amp that was transmitting, so the back-to-back diodes mod was made as it clearly had a weakness there. I was never sure the uBitX had the issue, but I had installed the diodes as many had suggested before this event. At one point in the diagnosis of the problem I pulled them, suspecting they might have shorted in the event, but that made no difference. I haven't bothered putting them back in at this point since they clearly didn't help in this case.
=Vic=
|
David, you win the prize! After confirming continuity right up the the leads of Q911/912, I pulled them from the circuit. Alas, they tested OK on the little transistor checker, so I confirmed that all the resistance values and circuit paths were OK and then installed 2 new 2N3904's after matching hfe values on the little tester (not really needed, but couldn't hurt). Surprise, output power has returned! The event that caused this had clearly taken Q90, and it did test bad after removal, but these 2 must be breaking down under load or something as you suggest. Power is only slightly less across the bands than before, but that could be that I am running slightly lower voltage to the finals today. While things were spread out across the bench I did remove the regulator circuit that was providing the lower power to the main board, but only after the transmitter repair was successful.
Evan, that RF probe you suggested has the identical circuit, including the component choices and values, to the one I cobbled up on the bench that helped trace the problem. Still, it is a much neater package than my perf board and clip leads, and quite inexpensive, so I have ordered one.
Thanks to you as well, Raj, for your suggestions. I was rocking T8 around and even bridging the capacitors with parallel? caps trying to get that signal to the next stage. The support from the community here is fantastic and I may have just chucked this thing without all the ideas, but it has been one of my favorite rigs and has traveled with me a lot, so I am glad to have it back and functional.
By the way, I also have a BitX40 and it blew a driver stage some years back because of being near a 500w amp that was transmitting, so the back-to-back diodes mod was made as it clearly had a weakness there. I was never sure the uBitX had the issue, but I had installed the diodes as many had suggested before this event. At one point in the diagnosis of the problem I pulled them, suspecting they might have shorted in the event, but that made no difference. I haven't bothered putting them back in at this point since they clearly didn't help in this case.
=Vic=
|
Re: BITX ver 5 Display Problem
Dennis,
The display gets its power from the 5volt regulator on the Raduino board.? That is powered from the 12volts through pins 15 and 16 on the main display board.
I would verify the in and out voltages on the LM7805 regulator on the Raduino board.
73
Evan
AC9TU
|
Hi all,
Sorry the off-topic. You all probably already know ADX, but just in case:
It is very simple, but seems cool for digital modes using single tone, and it is totally free and open source, just like the great uBitx!
Cheers,
Rafael PU2UIT
|
Re: BITX ver 5 Display Problem
I have traced my no display problem to lack of power. Whap pin or pins on the bottom main board connector supplies power to the display assembly?. Thank Your
I recently finished up my version 5 and lo and behold to my surprise, I have no display. I have? checked all the wiring over twice and cannot find any errors. Has anyone run into this problem. All other functions appear to work but really cannot tell what's going on without the display. Any advice would be appreciated. Thanks 73
|
Re: ft8 interface connections
#ft8
Thank you for everyone who gave me pointers on this.
I ended up using just the USB sound dongle without any other interface - could receive happily, but no-one was hearing me, and PSK Reporter wasn't showing much in the way of reception. Tried various things, including checking the antenna SWR at the 20m FT8 frequency (around 1.3, so pretty good). I was just not being heard.?
In the end, we diagnosed a poor audio signal from the software as the most likely culprit, as everything else seemed to be working correctly. So I put the mic cable (modified to avoid the constant T/X, as advised) directly into the iMac's phones output and set for a really good output level. ?Bingo! Suddenly I was being heard allover Europe & even had reports on PSK from Iceland & New York at 6600km. Then I made 4 QSOs in Germany & Netherlands within about 10 minutes. I don't doubt I should finesse the installation a little more, but right now, with two audio cables, a micro USB cable & a ?4 sound dongle, I have a working set-up.
These sets are amazing - thank you Ashhar!
73,
Jonathan
G5LUX
|
Paul Allison
Vic WA4THR