Re: Do you hate to wind toroids?
Raj,
I think it's this link,
Thomas
Dennis, a link please.
On 11/08/2022 5:43 PM, Dennis Zabawa
wrote:
I have discovered a great set of tools to make this process
quick and easy!
?
Go to the QPRME website and click on Toroid EZ Tools in the
sidebar.? Then read the documentation provided in the link.
?
While they seem a little pricey, $30.00, they make the task
of winding a toroid SO MUCH EASIER!
?
--
--
Support@...
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Re: Do you hate to wind toroids?
Dennis, a link please.
On 11/08/2022 5:43 PM, Dennis Zabawa
wrote:
toggle quoted message
Show quoted text
I have discovered a great set of tools to make this process
quick and easy!
?
Go to the QPRME website and click on Toroid EZ Tools in the
sidebar.? Then read the documentation provided in the link.
?
While they seem a little pricey, $30.00, they make the task
of winding a toroid SO MUCH EASIER!
?
|
Do you hate to wind toroids?
I have discovered a great set of tools to make this process quick and easy!
?
Go to the QPRME website and click on Toroid EZ Tools in the sidebar.? Then read the documentation provided in the link.
?
While they seem a little pricey, $30.00, they make the task of winding a toroid SO MUCH EASIER!
?
The kit actually came with three tools to wind T25, T30, T37, T50, T80 and T105 toroids.
|
Re: Nextion Display "File Version is too low"
Hi Ulf,
I haven't tested the QR code backup yet..I should probably do that.? I'll try it and get back to you.
73,
Tim A. King Jr.
Amateur Radio Station AG4RZ
Hi Tim,
have You tested using the "QR code backup"?? I have the same problem as you "... The remaining memory is not enough to run the temporary use of QR code (-261)..." I succeeded complie but I can't use the QR backup function, getting "Error- data file is short". Do You have the same problem ?
73 de SM0TRY, Ulf
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Re: Ubitx Ver 6 need PTT circuit for Linear AMP
This is correct and simple!
Thanks Evan.
Raj
On 10/08/2022 10:32 PM, Evan Hand
wrote:
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Michael,
I would not connect the PTT to that point on the v6 uBitx.? On
the mainboard, K1 has a TX tag on pin 1 of that relay.? You want
to tap into that signal and connect to the new PTT relay.? Here
is the section from the v6 schematic:
I would connect that TX signal to one side of the new PTT relay,
ground to the other side, and then a protection diode across the
new relay coil with the band (cathode) going to the +side of the
relay, and the anode connected to ground.
Suggestion on my part.
73
Evan
AC9TU
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Re: Ubitx Ver 6 need PTT circuit for Linear AMP
No no, partly yes. The amp side is correct but on uBitx side
connect one end of coil to ground
and other end to TX (12V on TX).. simplest. I usually dont
recommend connecting to PTT line
as any mishap will let out the magic smoke of the nano.
Raj
On 10/08/2022 9:42 PM, Michael wrote:
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Raj
I sometimes am a visual guy - Attached diagram what you envision?
--
KG5UMH
Michael - DM93am
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with calculator
On 10/08/2022 7:45 PM, John Clark
wrote:
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I see that there are converters using this chip are listed on
Amazon.
Do you know if the frequency is easily adjustable on these
boards?
John
On 8/10/2022 7:48 AM, Raj vu2zap
wrote:
Then I stumbled on this one (see attached pdf) MT3608 that
runs at 1.2MHz and will have
3.6/7.2 blips. Tweak it to 1.15 Mhz and this can be avoided.
Raj
On 10/08/2022 6:47 PM, Ashhar
Farhan wrote:
Neils,
Many of these switching regulators have a 50
KHz switching frequency. This has images inside the
passband of the audio codec.
I arrived at LM338 only after experimenting
with various switching systems (including building one
from discrete components). These new generation of
switchers move the frequency to 500 KHz. That's what makes
them useful.
- f
On Wed, Aug 10, 2022, 6:27
PM John Terrell < N6LN@...>
wrote:
The
smallest ones have a small cheap potentiometer which I
would not trust in the long run to maintain a stable
output voltage. Some have a secondary means of choosing
between four or five fixed voltage levels and bypassing
the fickle potentiometer by cutting a pcb trace with a
hobby knife. Loupes help. But in any case a buffer
capacitor ought to reduce a noisy output p.
|
Only experimentation will tell John!
Mt3608 is the boost version, mp2331h is buck version.
For some reason I am not able to open those net pages
to share with you all. Some problem since last night.
Raj
On 10/08/2022 7:45 PM, John Clark
wrote:
toggle quoted message
Show quoted text
I see that there are converters using this chip are listed on
Amazon.
Do you know if the frequency is easily adjustable on these
boards?
John
On 8/10/2022 7:48 AM, Raj vu2zap
wrote:
Then I stumbled on this one (see attached pdf) MT3608 that
runs at 1.2MHz and will have
3.6/7.2 blips. Tweak it to 1.15 Mhz and this can be avoided.
Raj
On 10/08/2022 6:47 PM, Ashhar
Farhan wrote:
Neils,
Many of these switching regulators have a 50
KHz switching frequency. This has images inside the
passband of the audio codec.
I arrived at LM338 only after experimenting
with various switching systems (including building one
from discrete components). These new generation of
switchers move the frequency to 500 KHz. That's what makes
them useful.
- f
On Wed, Aug 10, 2022, 6:27
PM John Terrell < N6LN@...>
wrote:
The
smallest ones have a small cheap potentiometer which I
would not trust in the long run to maintain a stable
output voltage. Some have a secondary means of choosing
between four or five fixed voltage levels and bypassing
the fickle potentiometer by cutting a pcb trace with a
hobby knife. Loupes help. But in any case a buffer
capacitor ought to reduce a noisy output p.
|
Re: sBitx antenna-first warning
Good one Luca,
Be honest about it, ive never burned up a radio or finals after i achieved my general class license back in the day.And anyone on a tight budget like me, you just dont throw away money by burning up your own gear.
just my take on it.
73
David
ac9xh
73
David
ac9xh
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Re: Ubitx Ver 6 need PTT circuit for Linear AMP
I built a 70 W amplifier, but it never did work.? I believe that the directions I had said that you can only get 30 watts of output out of it without purity issues, and it is more than 3 db down as compared to a 100 watt transceiver.?
I am going to recommend using a EB63A amplifier from Communications Concepts.
? ? 73, Dan Eggers, N7DE
?
toggle quoted message
Show quoted text
On Wed, Aug 10, 2022, at 11:17 AM, Michael wrote:
David,
Going to use this kit -??-
Seems to work well. I have the LPF already built. Just waiting on the Amplifier.
KG5UMH
Michael - DM93am
I have built that kit and have had issues meeting purity requirements with a 5-pole LPF.? There is also a potential issue with VSWR on the input to the amp.? I would review this article before powering the amp on:
That ham used a 7pole LPF to meet purity requirements.
I suggest you use a spectrum analyzer to verify the purity of the signal and a power/SWR meter on the input to confirm that you will not damage the uBitx and not overdrive the amp.? Note that you cannot use a NanoVNA to test the input SWR as the input SWR changes
with the gain of the amplifier.
I would also suggest you have a couple of spare IRF520 or IRF530 to replace if one fails during the build.? It may be that I am not careful enough or not thinking of all things that I should.? I went through 3 sets of MOSFETS until I got it right.? When replacing
the MOSFETS, use two from the same batch as there is only one bias control for adjustment.
I made it work after adding the suggested resistor across the secondary of the input transformer and reducing the power of the uBitx to less than 5watts using VR1.
Have fun with the build!
73
Evan
AC9TU
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Re: Ubitx Ver 6 need PTT circuit for Linear AMP
Evan,
Thanks. That is what I needed to know. Now to determine which of the six pins is #1. Schematic uses different numbering sequence than the data sheet for the relay. K3, KC1,KB1 and KA1 all show the numbering on the Schematic that the product data sheet shows.?
--
KG5UMH
Michael - DM93am
|
Can you hear what is going on or is it all visual? BO ? Sent from for Windows ?
toggle quoted message
Show quoted text
From: Don - KM4UDXSent: Wednesday, August 10, 2022 8:18 AM To: [email protected]Subject: Re: [BITX20] Ft 8 on the v-6 ? I use this guy.
 Or any cheap USB sound dongle. Jamb the sound card into your pc.? Hook the headphone jack of the sound card to the uBITX mic input.? Hook the mic input of the sound card to the uBITX speaker output. Make 100% sure wsjt-x sees the new sound card under wsjt-x audio. Fiddle with level setting.? Use a sperate usb cable to connect the little usb port on the Arduino to your PC.? Configure in WSJT-X.??
Go into FT8 land and enjoy.
Don
km4udx
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On 8/10/22 14:39, Gerald Sherman wrote: How does DHL do it?
Three hundred some odd airplanes? :D -- ------------------------------------------------------------------------ Bruce H. McIntosh bhmcintosh@... www.afn.org/~scotsman WA4UF ------------------------------------------------------------------------ Network geek with a strong affinity for Telecasters
|
Got it about 10 minutes ago - just over 50 hours from Hyderabad to Winnipeg!? How does DHL do it?
Gerry Sherman
Sent by the Thunderbird
|
Re: sBitx antenna-first warning
Hi The pleasure of using a radio like ubitx Is to esperimenti new solution to old issues! Burning out the radio Is the First! ? 73 Luca
Luca,
good info for the ones who need info on swr meters.
unfortunately there are some who ignore these basic tips,? they ignore this basic tool just like the field strength meter. Then they wind up burning their rigs up due to highly mismatched impedances. and the lack of understanding.
I use a field strength meter with all my transceivers. I have several,which range from simple to exotic. exotic meaning i have the meter in the shack,and the sensing unit in the yard. Actually 3 of them and i can tell if my antenna i built at the time is either efficient or not. Ive seen 1:1 swr but crappy field strength readings because of the "tuner"
Really is no reason for burning up radios even in these technologically advanced scenarios.
I get the banannas saved up i will be buying one of Ashhars new sbitxs. For now, im going to order another ubitx.
LOVE THESE RADIOS!!!!!!!!!!!!.
73
David
ac9xh
|
Yes, that is what I would do. In the photo it looks like it's filtered on both the input and output.
On Wed, Aug 10, 2022 at 12:12 PM Ashhar Farhan < farhanbox@...> wrote: The filter is, unexpectedly, needed on the input side. - f
On Wed, Aug 10, 2022, 10:36 PM JerryP < jponko@...> wrote: Niels,
Did you put the filter on the input side of the mini-360?
On Wed, Aug 10, 2022 at 10:42 AM Niels Jalling < niels@...> wrote: Tried adding filters to the mini-360 buck-converter. It helped a lot. now I can hear the same as on my old ft-77.
oz9ny, niels
--
|
Re: Ubitx Ver 6 need PTT circuit for Linear AMP
On Wed, Aug 10, 2022, at 11:17 AM, Michael wrote:
David,
Going to use this kit -??- Seems to work well. I have the LPF already built. Just waiting on the Amplifier.
KG5UMH
Michael - DM93am
I have built that kit and have had issues meeting purity requirements with a 5-pole LPF.? There is also a potential issue with VSWR on the input to the amp.? I would review this article before powering the amp on: That ham used a 7pole LPF to meet purity requirements. I suggest you use a spectrum analyzer to verify the purity of the signal and a power/SWR meter on the input to confirm that you will not damage the uBitx and not overdrive the amp.? Note that you cannot use a NanoVNA to test the input SWR as the input SWR changes with the gain of the amplifier. I would also suggest you have a couple of spare IRF520 or IRF530 to replace if one fails during the build.? It may be that I am not careful enough or not thinking of all things that I should.? I went through 3 sets of MOSFETS until I got it right.? When replacing the MOSFETS, use two from the same batch as there is only one bias control for adjustment. I made it work after adding the suggested resistor across the secondary of the input transformer and reducing the power of the uBitx to less than 5watts using VR1. Have fun with the build! 73 Evan AC9TU
|
Re: Ubitx Ver 6 need PTT circuit for Linear AMP
Ideally the amp would go into TX 10-20ms before the radio as well as staying keyed for 10-20ms after the radio stops transmitting. This would prevent HOT keying of the radio and burning of relay contacts.
Max KG4PID
On Wednesday, August 10, 2022, 12:02:43 PM CDT, Evan Hand <elhandjr@...> wrote:
Michael,
I would not connect the PTT to that point on the v6 uBitx.? On the mainboard, K1 has a TX tag on pin 1 of that relay.? You want to tap into that signal and connect to the new PTT relay.? Here is the section from the v6 schematic:
I would connect that TX signal to one side of the new PTT relay, ground to the other side, and then a protection diode across the new relay coil with the band (cathode) going to the +side of the relay, and the anode connected to ground.
Suggestion on my part.
73
Evan
AC9TU
|
The filter is, unexpectedly, needed on the input side. - f
On Wed, Aug 10, 2022, 10:36 PM JerryP < jponko@...> wrote: Niels,
Did you put the filter on the input side of the mini-360?
On Wed, Aug 10, 2022 at 10:42 AM Niels Jalling < niels@...> wrote: Tried adding filters to the mini-360 buck-converter. It helped a lot. now I can hear the same as on my old ft-77.
oz9ny, niels
--
|
Niels,
Did you put the filter on the input side of the mini-360?
On Wed, Aug 10, 2022 at 10:42 AM Niels Jalling < niels@...> wrote: Tried adding filters to the mini-360 buck-converter. It helped a lot. now I can hear the same as on my old ft-77.
oz9ny, niels
|
Raj vu2zap
mrz80
Luca
JerryP