¿ªÔÆÌåÓý

Date

Re: uBITx For Sale #ubitx

 

¿ªÔÆÌåÓý

Hi Marty:

If available I will take it. Paypal to ????

Tim

WB7UVH


On 2018-03-11 14:46, Marty Squicciarini wrote:

I ordered the uBITx (ordered on 2-Jan) but things have changed and I don't have time for the project.

uBITx? unopened except for photos? ?$109

Marty?
NR3Z@...



Re: RD16HHF1 power curve flattening...some

John
 

Hello Glen,

Very interesting. Do you have measurements of you final's power across the bands by any chance?

All the best,

73, John? (vk2eta)


Re: #uBITX Firmware KD8CEC - IF-Shift etc. #ubitx

 

Well, that was another thing that got pruned out the original document
before posting as 44182.

All that 44182 has to say is:
??When adjusting the BFO, we should move the VFO to get us back to the displayed frequency.
Doesn't say anything about what the original uBitx code does.
?
Sorry for any confusion.

Jerry


On Sun, Mar 11, 2018 at 09:40 am, Jerry Gaffke wrote:
As I stated in post 44182, the original uBitx code only moves the BFO when doing a BFO Adjust,
and you agree that this is not ideal.


7277MHz

Denis
 

I copied N5KYD @ 20:10 and W0OIC @ 20:41. I am in Western Kentucky. Using my bits40 for receive, can not transmit at this time.

Denis, WB8SKP


Re: Complaint Department

 

Very good advice

On Sun, Mar 11, 2018 at 6:58 PM, ekelley <ekelley828@...> wrote:
Guys & Gals,
I didn't want to leave anyone out. I just thought I should remind everyone that this is a forum for the BitX (all BitX's). It is made up with thousands of radio amateurs who want to expand and enjoy their hobby. I have been licensed for 64 years now. I am a Technician (not an Engineer). I fix things, build them, troubleshoot them, analyze them, I read schematics, what I don't do is design things! Farhan has done an excellent job with the BitX and has made many improvements to his designs. He has put out a quality product that thousands have enjoyed using. Basically the BitX is a great entry level transceiver that is affordable for all. It is not a perfect transceiver, but that is what this forum is for, to share modifications, improvements, and new ideas with each other. We do have outstanding Engineers on this forum. No matter what your background is, there is help for you on this forum. If it doesn't work, someone will help you troubleshoot and find the answer. There is no warranty on the BitX. It is being offered that way to keep the costs down. I have one of the first uBitX's shipped. I put it together in a small chassis, I found a few mistakes and I fixed them. My output power with 12.6 volts applied is about 8 watts on 40 meteres. My first contact was 1500 miles away with a S9 report. I'm almost afraid to add any mods to it since it works sooo good. For beginners, when you get your uBitX, I have a few suggestions, First, follow the instructions, do not try to read the schematic, use the pictures in the instructions for placement of the colored wires. For the 3.5 mm speaker jack, do not jumper the tip to the ring, this will prevent shorting audio out when a mono plug is inserted. Last suggestion - It is a QRP transceiver, don't try to get more power out of it! If you need more power, use an external amplifier, there is a file on this forum on how to do this. Most power supplies run up to 13.8 volts, don't go over that, I chose 12.6 volts and nothing gets hot and I can use digital. Lastly, respect everyone on this group, we are from all over the world and we are all friends in our hobby.
Ed W0OIC



uBITx For Sale #ubitx

Marty Squicciarini
 

I ordered the uBITx (ordered on 2-Jan) but things have changed and I don't have time for the project.

uBITx? unopened except for photos? ?$109

Marty?
NR3Z@...


Re: #uBITX Firmware KD8CEC - IF-Shift etc. #ubitx

 

One more complication,

Post 44182 puts clk1 at 57995000 for USB and 32997000 for LSB.
They can both be adjusted up and down by some equal number of hz?
to compensate for differences in where the center of the 45mhz passband is.
But this all assumes that the center of the sideband of interest is 1500 hz
from the carrier.??

We may need to move the USB and LSB values for clk1 independently
when the PBT function changes that figure of 1500 hz by a few hundred Hz.
But the effect of a few hundred Hz should be far less noticeable
than the current difference of around 4khz.?

Good thing the math here is all just addition and subtraction,?
nothing complicated.? ;-)

Jerry, KE7ER


On Sun, Mar 11, 2018 at 12:16 pm, Jerry Gaffke wrote:
Yes, the passband of the 12mhz filter can vary by rig.
The fix is using a PBT function within the configuration menu
to get the best audio on an LSB signal.

Could be that the 45mhz passband varies significantly by rig as well, making USB sound different than LSB.
So symptoms like what Gerald's original post to this thread describes.
If so, we need another configuration menu item to scoot around clk1 an equal amount for USB and LSB
as described in post 44182:
> If the 45mhz crystal filter sweeps out to be somewhere else, then add the difference to those two figures.
> For example, if the center is found to be at 44.997mhz (so 2khz higher) then the two figures for clk1
> should be 56995000 hz and 32999000 hz.
?
Should be able to do this all by ear if stuff is working but just off a bit in frequency.
If not working, then might need a diode RF probe or Nik's AD8307.
Plotting from the Raduino onto the USB host could be done as per post 32630.

Jerry, KE7ER


Re: [uBiTx] last frequency memory?

 

¿ªÔÆÌåÓý

Upgrade to the KD8CEC firmware (requires no hardware mods) as this remembers your last tuned frequency ...

M

On 12/03/18 1:36 AM, sulu82@... wrote:
I have the same problem.Mine defaults at 7.350.


--
Mike Woods
mhwoods@...


Re: The issues of the TDA2822

Marko Pavlicevic
 

Fahran,

That is ok, but can you answer my question?
"I placed an order few days ago... Does that mean that I will have normal chip that doesn't need any mods? Maybe just lowering voltage with 78L09?"

Thank you in advance.


Re: BITX QSO Afternoon/Night, Sunday, March 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

I am KM4TLR. That may be the second station you were trying to identify.


Re: BITX QSO Afternoon/Night, Sunday, March 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

only just heard WA4THR and xxxDLR???? very weak sigs so far.?


Re: BITX QSO Afternoon/Night, Sunday, March 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

Just had a QSO with WA4THR. Signal was 5/5 at one point but faded completely out in a matter of seconds.?


, bitx voices3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

 

Yeah
Hearing some bits of bitx voices. on 72769khz
Heard band shifted louder then it stopped.
Listening.
KE0PVO


Re: #uBITX Firmware KD8CEC - IF-Shift etc. #ubitx

 

Yes, the passband of the 12mhz filter can vary by rig.
The fix is using a PBT function within the configuration menu
to get the best audio on an LSB signal.

Could be that the 45mhz passband varies significantly by rig as well, making USB sound different than LSB.
So symptoms like what Gerald's original post to this thread describes.
If so, we need another configuration menu item to scoot around clk1 an equal amount for USB and LSB
as described in post 44182:
> If the 45mhz crystal filter sweeps out to be somewhere else, then add the difference to those two figures.
> For example, if the center is found to be at 44.997mhz (so 2khz higher) then the two figures for clk1
> should be 56995000 hz and 32999000 hz.
?
Should be able to do this all by ear if stuff is working but just off a bit in frequency.
If not working, then might need a diode RF probe or Nik's AD8307.
Plotting from the Raduino onto the USB host could be done as per post 32630.

Jerry, KE7ER


On Sun, Mar 11, 2018 at 11:54 am, Michael Shreeve wrote:
Also, seems like Ashar, some time back, not sure he was talking about BITX40 or uBITX had said that the crystals used for these passbands were not always using quite the same frequency due to the fact that the folks he had making the crystals were not always providing accurate crystals ? He indicated that they would go through the crystals and match them for a group.? So , occasionally , if this is true, the passband of the filter could be different a kc or two ? A Vector Analyzer or tracking generator plus scope could verify this, but, you'd need access to a bunch of radios.?


Re: BITX QSO Afternoon/Night, Sunday, March 11, 3PM/7PM Local Time, 7277 kHz in North America, 7177 kHz elsewhere

John P
 

I'm on 7277. Very quiet. Anyone else out there?
--
John - WA2FZW


Re: #uBITX Firmware KD8CEC - IF-Shift etc. #ubitx

 

Also, seems like Ashar, some time back, not sure he was talking about BITX40 or uBITX had said that the crystals used for these passbands were not always using quite the same frequency due to the fact that the folks he had making the crystals were not always providing accurate crystals ? He indicated that they would go through the crystals and match them for a group.? So , occasionally , if this is true, the passband of the filter could be different a kc or two ? A Vector Analyzer or tracking generator plus scope could verify this, but, you'd need access to a bunch of radios.?


Re: LCD Bumper

 

For $4 I¡¯ll take a kit. K2CPU


On Sun, Mar 11, 2018 at 1:52 PM Roy Appleton <twelveoclockhigh@...> wrote:
Michael, would you provide a link to your kits?

Thanks,
Roy
WA0YMH

On Mar 11, 2018 12:42 PM, "Michael Hagen" <motdog@...> wrote:

Here is the STL file for my Bezel.? As most know, 3D printing is hit and miss.

My kit includes the Bezel, Metric Flat head screws, sheet metal screws, ABS standoff, and ABS 1/8" spacers for

using original metal standoffs or all Plastic.? It was for orginal BitX on a 1/16" al. panel, uBit users may have to improvise.


Have at it, it takes about 1 1/2 hr. to print and I get to throw out 1 out of 3 prints because of warping (pulling up at the ends).


73's Mike


On 3/11/2018 9:15 AM, Lawrence Macionski via Groups.Io wrote:
WA6ISP has them for sale in his catalog list -$4.00

Larry- W8LM

-- 
Mike Hagen, WA6ISP

(909) 918-0058
PayPal ID  "MotDog@..."
Mike@...

--
Ben
K2CPU


Re: #uBITX Firmware KD8CEC - IF-Shift etc. #ubitx

 


So we have two knobs to twiddle during receive:
? ? RIT:? Change the tuning on receive only.
? ? PBT:? Change the tuning and the BFO, both in sync

This post suggests that "Clarify" is just another name for "RIT".


In post 44223, I said this, I still think it's right but am open to arguments:
>? ? Yes, changing only the BFO when trying to listen to a signal is generally a bad idea.

We need a PBT to set the default position of BFO relative to 12mhz filter passband during calibration.
We also need a receive only version, perhaps call it RI-PBT?
Then if the other end is tuned up for somebody with a high pitched voice
or if there is a nearby carrier that we wish to get rid of,
we can adjust our receiver to compensate without disturbing our transmission.

Jerry


On Sun, Mar 11, 2018 at 11:12 am, Allard PE1NWL wrote:
yes, PBT and "clarifier" are indeed two different things.

When I implemented this functionality in the Raduino v2 sketch for BitX40,
I initially called it "clarifier", however later I realised this was not
the correct term. I later renamed it to Pass Band Tuning as I believe that
is more appropriate.

Whatever you call it, technically it allows the operator to shift the BFO
frequency during RX, and at the same time the VFO frequency is shifted by
the same amount (so that the relationship of the BFO to the suppressed
carrier is not affected).

If you still have a BitX40, try it out this simple mod and you will be
amazed about this feature.


Re: Complaint Department

chris gress
 

Well said ...chris

On 11 Mar 2018 17:58, "ekelley" <ekelley828@...> wrote:
Guys & Gals,
I didn't want to leave anyone out. I just thought I should remind everyone that this is a forum for the BitX (all BitX's). It is made up with thousands of radio amateurs who want to expand and enjoy their hobby. I have been licensed for 64 years now. I am a Technician (not an Engineer). I fix things, build them, troubleshoot them, analyze them, I read schematics, what I don't do is design things! Farhan has done an excellent job with the BitX and has made many improvements to his designs. He has put out a quality product that thousands have enjoyed using. Basically the BitX is a great entry level transceiver that is affordable for all. It is not a perfect transceiver, but that is what this forum is for, to share modifications, improvements, and new ideas with each other. We do have outstanding Engineers on this forum. No matter what your background is, there is help for you on this forum. If it doesn't work, someone will help you troubleshoot and find the answer. There is no warranty on the BitX. It is being offered that way to keep the costs down. I have one of the first uBitX's shipped. I put it together in a small chassis, I found a few mistakes and I fixed them. My output power with 12.6 volts applied is about 8 watts on 40 meteres. My first contact was 1500 miles away with a S9 report. I'm almost afraid to add any mods to it since it works sooo good. For beginners, when you get your uBitX, I have a few suggestions, First, follow the instructions, do not try to read the schematic, use the pictures in the instructions for placement of the colored wires. For the 3.5 mm speaker jack, do not jumper the tip to the ring, this will prevent shorting audio out when a mono plug is inserted. Last suggestion - It is a QRP transceiver, don't try to get more power out of it! If you need more power, use an external amplifier, there is a file on this forum on how to do this. Most power supplies run up to 13.8 volts, don't go over that, I chose 12.6 volts and nothing gets hot and I can use digital. Lastly, respect everyone on this group, we are from all over the world and we are all friends in our hobby.
Ed W0OIC


S-Meter from VU2ESE AGC

 

I've been playing with Ashar's AGC circuit on my BitX40, and it seems to work pretty well if I add additional capacitance across C113 ( I added 4.7uf in parallel because that's what I had on hand) to build back some of the level and actually improve the fidelity. Watching the voltage change on the gate of the 2N7000 looks like it would be a great spot to tap for an S-meter input to the Raduino. Has anyone tried this? The voltage is pretty low, but changes smoothly with the level of signal.

=Vic=