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Re: Latest FW Update

 

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Others have had trouble with the pins and connectors¡­ they are not all created the same and can cause intermittent connections if they are not 100% compatible.

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

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Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

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Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

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email:? bill@...

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From: [email protected] <[email protected]> On Behalf Of Tim via groups.io
Sent: Saturday, April 12, 2025 7:10 PM
To: [email protected]
Subject: Re: [AmateurRadioBuilders] Latest FW Update

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Some how when I use the audio hat extension board it causes issues, If I plug audio hat direct into main board no boot issues.?

I ohmed out the traces on on extension board and all seem fine, so not sure but I can go on with calibration and working on optimizing rf cable lengths and ends.

Odd thing is I never had issue with previous builds, I tried previous build and got same result so I suspected hardware.

Good thing is I have plenty of room for audio hat extension is not needed.?

Tim W4YN

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Re: Latest FW Update

 

Some how when I use the audio hat extension board it causes issues, If I plug audio hat direct into main board no boot issues.?
I ohmed out the traces on on extension board and all seem fine, so not sure but I can go on with calibration and working on optimizing rf cable lengths and ends.
Odd thing is I never had issue with previous builds, I tried previous build and got same result so I suspected hardware.
Good thing is I have plenty of room for audio hat extension is not needed.?
Tim W4YN
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Re: Latest FW

 

Forgot, compile options set as requested on GetHub.
Tim?
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Re: Latest FW

 

FLASH: code:312604, data:132408, headers:8612 ? free for files:7672840
? ?RAM1: variables:194688, code:288904, padding:6008 ? free for local variables:34688
? ?RAM2: variables:483744 ?free for malloc/new:40544


Re: Latest FW

 

What are the summary statistics at the end of the compile? What were the compile options set to?

Jack, W8TEE

On Saturday, April 12, 2025 at 12:36:18 PM EDT, Tim via groups.io <w4yn@...> wrote:


Oliver
I down loaded latest version on Get Hub and updated libraries as instructed.
I used IDE 2.3.6 (couldn't find .5)?
All compiled fine.?
I reset memory on Teeny.?
Uploaded no errors.?
On boot up program stops working at random points, never had that with previous versions.
Sometimes it makes it thru i2c checks and gets to spectrum display but freezes, on a few occasions it would tune for a couple of clicks then freeze.
Stumped at moment.
Tim W4YN
?

--
Jack, W8TEE


Re: Latest FW

 

Oliver
I down loaded latest version on Get Hub and updated libraries as instructed.
I used IDE 2.3.6 (couldn't find .5)?
All compiled fine.?
I reset memory on Teeny.?
Uploaded no errors.?
On boot up program stops working at random points, never had that with previous versions.
Sometimes it makes it thru i2c checks and gets to spectrum display but freezes, on a few occasions it would tune for a couple of clicks then freeze.
Stumped at moment.
Tim W4YN
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Re: Boards and kits in the UK/EU

 

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Thanks Andy!

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

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From: [email protected] <[email protected]> On Behalf Of Andy Rutter
Sent: Saturday, April 12, 2025 2:53 AM
To: [email protected]
Subject: Re: [AmateurRadioBuilders] Boards and kits in the UK/EU

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Also posted to SoftwareControlledHamRadio.

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I have created a spreadsheet for you to express interest in boards and kits from Bill, K9HZ.? There are currently no prices on the spreadsheet as these will depend on the quantity requested from K9HZ.

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Download the spreadsheet, fill in your callsign and email address plus a quantity for each item of interest and then email to me - g8hck@.... Please don't send to the group.

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? Andy, g8hck


Re: Boards and kits in the UK/EU

 

Also posted to SoftwareControlledHamRadio.
?
I have created a spreadsheet for you to express interest in boards and kits from Bill, K9HZ.? There are currently no prices on the spreadsheet as these will depend on the quantity requested from K9HZ.
?
Download the spreadsheet, fill in your callsign and email address plus a quantity for each item of interest and then email to me - g8hck@.... Please don't send to the group.
?
?
--
? Andy, g8hck


FYI...

 

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I do have part of my new system for invoicing for boards and kits up and running.? Invoices for will come to you from Paypal and have the email address sales@....? Please don¡¯t ignore them!? After 5 days I will cancel them and you go to the back of the line again.

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

?


Boards and kits in the UK/EU

 

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For those of you in the UK/EU¡­ Andy Rutter, G8HCK, has graciously agreed to distribute T41/ K9HZ/ K9HZ-KI3P boards and kits there.? I¡¯ll attempt to ship him a load of stuff and he will make arrangements to ship to you.

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In the short term, you should give him your order and at a time in the near future¡­ he can forward the combined order for me to ship to him.? You can contact him at:? arutter@...

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?

Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

?


Re: Latest FW

 

I used 2.3.6 IDE?
I think results look good:
Memory Usage on Teensy 4.1:
? FLASH: code:312604, data:132408, headers:8612 ? free for files:7672840
? ?RAM1: variables:194688, code:288904, padding:6008 ? free for local variables:34688
? ?RAM2: variables:483744 ?free for malloc/new:40544
Tim


Cheap isolation transformers

 

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I ran across something that I need to share.? I bought a two-pack of audio transformers on Amazon that work very well for the cost.? Works great to break ground-loop issues, hum, etc.? Cheap too¡­ and a WHOLE LOT cheaper than the ElectroVoice transformers I usually buy at $225 each with my RE20¡¯s!? Tried it on my T41 and it does clean up the mic.? Not perfect but cheap.

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I have an audio board on the drawing board and it includes cheap open frame (full audio range audio) isolation transformers

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

?


Re: The T41 from 4SQRP and V11 boards.

 

I used my V10 (4sq kit) for many contacts before selling to finance V11 build.
Nothing bad about that version, 10 and 6 were problematic but there are fixes for those bands.?
I also used Dr. Bill's PA in that version and now V11 build which is almost finished, just wrapping up cabling layout and ordering custom cables.
Tim W4YN?


The T41 from 4SQRP and V11 boards.

 

All:
Recent there was a negative post about the V11 boards and the T41 from 4SQRP. I got this private email from Neville Marr, ZL2BNE, who has been following the T41 from its inception. He has a T41 from 4SQRP and speaks positively about it. I asked him if I could re-post his email because I know there are a lot of 4SQRP radios out there and he wants everyone to know that it is a good radio that he uses on a regular basis. I, too, have a 4SQRP T41 and it is a very good radio. He gave me his okay to post his email.

Jack, W8TEE
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Hi Jack,

We haven¡¯t communicated in quite some time but I continue to check-in on the softwarecontrolledhamradio group from time to time.

I¡¯ve recently reviewed postings and one took my attention ¡­ for the wrong reasons.?

/g/SoftwareControlledHamRadio/message/33358

The post was pretty disparaging of the V11 receiver performance, among other things calling it an intolerable toy radio. I see no point in giving such posts oxygen on the forum but I felt a need to let you know my experience is totally different.

You will recall I was an early adopter of the T41 project, I had V10 boards made and did my own thing. You will also recall I was quite critical of some aspects of the project. I always had issues with the transmit side of my V10 T41 but never the receive side. The receiver worked from day one. In my case I don¡¯t hear any noise on rx with a dummy load connected. I can easily hear my Marconi sig gen set as low as it will go at -127dBm. It¡¯s a very good receiver.

Over time I made a number of hardware changes to my QSE, I built two filters of my own design, one follows the QSE the other follows the PA. Final transmit change is adopting the K9HZ PA.

Today my radio works faultlessly using Greg¡¯s T41EEE.

I got everything where I wanted and started logging contacts in August 2023. I¡¯m not much of an operator but do put my creations on the air. I¡¯ve just interrogated my log to discover I¡¯ve logged exactly 100 contacts using my T41. Quite a cool number. I¡¯ve had the T41 on the air more times than that, mainly local nets, but all the same 100 in the log. Below is a breakdown of the 100. I¡¯ve worked every continent except Africia (Africia is notoriously difficult to work from NZ, South Africia is the rarest DX from NZ).

So thank you for getting the T41 up and running. I am a little sad that V10/11 got supplanted by V12 because V10/11 is a very good radio. I do hope people can get V12 to a place where V12 T41 are on the air too.

My T41 is my go-to radio, my daily runner.

?Cheers,

Neville ZL2BNE

?Inline image







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Jack, W8TEE


Re: Stencil with 3D printer

 

Hi John
Strange because at the end of the process, a window open to save the file. Had you already installed SCAD before? , it is mandatory.
I think, now you have it installed, the "EXE" will work. But I saw? you solved your problem in another way o;)


Re: compile error V66-9

 

Good...glad it helped.

Jack, W8TEE

On Wednesday, April 9, 2025 at 08:34:49 PM EDT, glenn via groups.io <vk3pe@...> wrote:


Appreciate the help, Jack.
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ON my PC I did what you suggest, partially at least.
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I removed the old IDE version and now IDE 2.3.5 compiles OK.
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Glenn

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Jack, W8TEE


Re: compile error V66-9

 

Appreciate the help, Jack.
?
ON my PC I did what you suggest, partially at least.
?
I removed the old IDE version and now IDE 2.3.5 compiles OK.
?
Glenn


Re: [SoftwareControlledHamRadio] SWR Calibration

 

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The code I wrote to measure SWR from the forward and reflected powers is here:
https://github.com/DRWJSCHMIDT/T41/tree/main/T41_V012_Files/T41_V012_Software/T41_V12_Software_For_Board_Testing/K9HZ_LPF_tester

I think Al used it as the starting point for the code that's in ver 66-9, though he took it a lot further and added the calibration methods.

Adding support for the diodes is a long way down the priority list for me, so don't hold your breath. Maybe someone out there with a V12 radio would like to take this on and share their work with the rest of us?



-------- Original Message --------
On 4/9/25 6:05 PM, K9HZ wrote:

Dave¡­ the code for the analog SWR metering is not there.? The code for the I2C stuff is¡­ BUT with this said, its not a hard thing to do.? A12 is Forward power and A13 is Reflected at the teensy¡­ so then you just need to calibrate the voltages in after scanning with the teensy.? Remember they are LOG Voltages for power... so Forward Power = A*log (forward voltage) and Reflected Power = B*Log(reflected voltage). ?Then SWR is gamma = Reflected Power/ Forward power¡­. And SWR = (1+sqrt(gamma))/(1-sqrt(gamma)).

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I think Oliver did program this up once upon a time¡­ would probably take him 10 seconds to do it.

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

?

Owner - Operator

Big Signal Ranch ¨C K9ZC

Staunton, Illinois

?

Owner ¨C Operator

Villa Grand Piton ¨C J68HZ

Soufriere, St. Lucia W.I.

Rent it:

?

Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

?

email:? bill@...

?

?

From: [email protected] <[email protected]> On Behalf Of D Solt via groups.io
Sent: Wednesday, April 9, 2025 3:03 PM
To: [email protected]
Subject: [SoftwareControlledHamRadio] SWR Calibration

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I am running the latest SW ver66.9, downloaded today.? I am use the analog SWR circuits.? I have good FWD-V (~1.5V) and REV-V (0.005) into the dummy load and REV-V varies as load resistance varies.? In the Cal screen, Power and SWR measure "inf" and "nan".? Nothing changes them.? And, where should the pots, RV19 and RV27, be set?? Thanks for the help.

dave, n3ds


Re: Reminder

 

Thanks for the clarification of your addressing method, Bill. It resolves the issue for me that was created by Paypal's new insistence on my using only Australian shipping addresses.
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Re: Stencil with 3D printer

 

On Wed, Apr 9, 2025 at 12:03 PM, Alain wrote:
I tried this one, but when I supplied all the files and parameter and clicked Make STL, it would seem to work, meaning the progress bar progressed, but there would be no output.
Alex, I tried , and though it took me a lot of time to figure how to set up the environment, it worked. Afterwards, to convert the scad output file to STL, I? used OpenSCAD () to convert it to an STL file. Now I am just waiting for my Bambu X1C printer to arrive. Thankfully, I got one before the tariffs hit. :) That isn't the case for a NanoVNA V2 that is arriving from China in a few days :(
After I finish with all the boards, I will post the STL files for others to use.?