Re: [SoftwareControlledHamRadio] SWR Calibration
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?
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-------- 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)). ? 
? I think Oliver did program this up once upon a time¡ would probably take him 10 seconds to do it. ? ? 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@... ? ? ? 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.
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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.?
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Re: [SoftwareControlledHamRadio] SWR Calibration
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)). ? 
? I think Oliver did program this up once upon a time¡ would probably take him 10 seconds to do it. ? ? 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 D Solt via groups.io
Sent: Wednesday, April 9, 2025 3:03 PM
To: [email protected]
Subject: [SoftwareControlledHamRadio] SWR Calibration? 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.
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I shared an amazon link earlier to a board that should work. I don't recall exactly where I bought the particular board I have on hand and can't find a purchase record since it was many years ago.
-------- Original Message -------- On 4/9/25 2:36 PM, dick faust via groups.io wrote: Tim
I have not built this up as yet.? You need to ask Oliver which board that he used.? If you look at the Pix that Oliver attached and count the pins it is a 38 pin ESP32 Development board [I think Wroom but cannot decipher the last few characters on the part].? The link that Oliver provided at Amazon was for a 30 pin board.? Oliver's board has a jack for a Wi-Fi antenna , but that is not used in the test stand.
I am going to make a schematic shortly, so I can identify the exact pins that are used and be sure that the extra I/O pins on the 38 pin versions are unused.? I will post it here for review unless Oliver has one already available.? I will also try to show how the Expansion Board(s) fit with the Development board(s) when plugged into an Expansion Board.
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Just as an aside, I am working on a special application of a clock operated switch using the ESP32 as a real time clock attached to my WiFi network for NPT time reference.?
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Dick K9IVB
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Tim
I have not built this up as yet.? You need to ask Oliver which board that he used.? If you look at the Pix that Oliver attached and count the pins it is a 38 pin ESP32 Development board [I think Wroom but cannot decipher the last few characters on the part].? The link that Oliver provided at Amazon was for a 30 pin board.? Oliver's board has a jack for a Wi-Fi antenna , but that is not used in the test stand.
I am going to make a schematic shortly, so I can identify the exact pins that are used and be sure that the extra I/O pins on the 38 pin versions are unused.? I will post it here for review unless Oliver has one already available.? I will also try to show how the Expansion Board(s) fit with the Development board(s) when plugged into an Expansion Board.
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Just as an aside, I am working on a special application of a clock operated switch using the ESP32 as a real time clock attached to my WiFi network for NPT time reference.?
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Dick K9IVB
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Re: Stencil with 3D printer
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Re: Stencil with 3D printer
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Re: FW: [SoftwareControlledHamRadio] boards and kits and stuff
Ok got you on the list¡ ? ? 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 john mann via groups.io
Sent: Tuesday, April 8, 2025 7:03 PM
To: [email protected]
Subject: Re: [AmateurRadioBuilders] FW: [SoftwareControlledHamRadio] boards and kits and stuff? When you get it together, I want the 3.3 and 5V display driver kit.
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Re: Stencil with 3D printer
Hi John,
Yes the website is down and the CLI app isn't working. A file seems missing.
I found this :
The GUI is identical to web application and works perfectly
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Alain
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Re: Stencil with 3D printer
I found the GitHub repository at:
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It has the Python code for both a CLI app & a web app.
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Alex
N7AWK
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Glad that helped!!
Jack, W8TEE
On Wednesday, April 9, 2025 at 12:24:15 AM EDT, glenn via groups.io <vk3pe@...> wrote:
Jack,
Some of the programs/projects i have from the past only compile ok with the old version IDE.
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So, I got out my laptop and did a clean install on it with IDE 2.3.5 and the appropriate LIB's installed.
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SUCCESS.? Compiles now without errors.
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Thanks for taking the time.
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Glenn
vk3pe
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-- Jack, W8TEE
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Dick
Do you have a link to exact ESP32 Development board you used and know works?
Tim
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Re: IDE Version 2.3.5 and updated 66-9 (Menu Error and Frequency Calibration Fixes)
I've been compiling with the following settings: Dual Serial 528 MHz Faster with LTO
I get the following memory usage:
Memory Usage on Teensy 4.1:? FLASH: code:312132, data:132408, headers:9084 ? free for files:7672840 ? ?RAM1: variables:194720, code:288440, padding:6472 ? free for local variables:34656 ? ?RAM2: variables:483744 ?free for malloc/new:40544
People have reported success with both 528 MHz and 600 MHz. It's probably best to select the slowest clock speed that works to reduce heat dissipation and improve longevity.
On Wednesday, April 9th, 2025 at 12:14 AM, J P Watters via groups.io <jpwatters@...> wrote:
Is the Memory Usage in line with the normal compilation? (Data listed below)
Does it make a difference choosing 600mhz vs 528mhz?
How fast can we run the teensy 4.1 ? Cooling appears to be recommedned at above 912mhz.
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Tonight I downloaded the updated 66-9 with the updates that fixed the Fixed FT increment on every Menu Exit and? the Fine Tune Offset bug in Frequency Calibration.
When I opened the updated code, the Arduino Application offered an update to 2.3.5, which I did.
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Compiled the code with no errors.
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Optimize - Faster with LTO
CPU speed - 600 mhz?
USB Type - Dual Serial
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Opening Teensy Loader...
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Memory Usage on Teensy 4.1:
? FLASH: code:312356, data:132408, headers:8860 ? free for files:7672840
? ?RAM1: variables:194688, code:288712, padding:6200 ? free for local variables:34688
? ?RAM2: variables:483744 ?free for malloc/new:40544
?
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..jpw J P Watters
KC9KKO
Morris, IL USA
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Jack,
Some of the programs/projects i have from the past only compile ok with the old version IDE.
?
So, I got out my laptop and did a clean install on it with IDE 2.3.5 and the appropriate LIB's installed.
?
SUCCESS.? Compiles now without errors.
?
Thanks for taking the time.
?
Glenn
vk3pe
?
?
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IDE Version 2.3.5 and updated 66-9 (Menu Error and Frequency Calibration Fixes)
Is the Memory Usage in line with the normal compilation? (Data listed below)
Does it make a difference choosing 600mhz vs 528mhz?
How fast can we run the teensy 4.1 ? Cooling appears to be recommedned at above 912mhz.
?
Tonight I downloaded the updated 66-9 with the updates that fixed the Fixed FT increment on every Menu Exit and? the Fine Tune Offset bug in Frequency Calibration.
When I opened the updated code, the Arduino Application offered an update to 2.3.5, which I did.
?
Compiled the code with no errors.
?
Optimize - Faster with LTO
CPU speed - 600 mhz?
USB Type - Dual Serial
?
Opening Teensy Loader...
?
Memory Usage on Teensy 4.1:
? FLASH: code:312356, data:132408, headers:8860 ? free for files:7672840
? ?RAM1: variables:194688, code:288712, padding:6200 ? free for local variables:34688
? ?RAM2: variables:483744 ?free for malloc/new:40544
?
?
..jpw J P Watters
KC9KKO
Morris, IL USA
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I think things are mixed up between the old IDE installs and the new ones. The path used for my install is:
C:\User\jack\AppData\Local\Arduino15\packages
Under the packages directory are arduino and teensy. All of the Arduino stuff from the latest download for the IDE in found below the arduino directory. Everything for the Teensy should be below the teensy directory. However, when I look at your compile, I see:
c:\Users\default.glenn\Documents\Arduino\libraries\ArduinoJson\src/ArduinoJson/Document/BasicJsonDocument.hpp:7,
which is not the path that the IDE is going to use to find everything. This looks like the pre-2.0 versions of the IDE. I would uninstall the old versions of the IDE using
Control Panel --> Programs and Features
HIghlight all of the Arduino IDE's and click on Uninstall. To play it safe, I would uninstall the TeensyhDuino, too, using the same Control Panel commands.? I would then reinstall everything.
Yeah, it's a pain in the butt, but I think it's necessary.
Jack, W8TEE
On Tuesday, April 8, 2025 at 08:53:50 PM EDT, glenn via groups.io <vk3pe@...> wrote:
Jack, Oliver,
I have IDE Vers 2.3.4 also on my PC which I have now tried, with same results.
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I had already downloaded the non-standard LIBs to the versions shown.
I also had already installed the patch. V1.59
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Still, on compile I get heaps of errors or at least text in the errors box ending with the same result as before.?
Line 695 in SDT.h Compilation error: expected '>' before numeric constant
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I used the v66-9 download with no changes at this point to config.
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Rather than fill this reply with the error message: I have put it into a DOC file, attached.
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I'm sure it's something simple or stupid but when I get a pile of errors like that, my little knowledge, fails me !
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Glenn
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On Wed, Apr 9, 2025 at 12:52 AM, Jack, W8TEE wrote:
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That is a very old version of the IDE and I would be surprised if the libraries are up-to-date. I would:
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?? 1) Download/install the new Arduino IDE (2.3.5): ()
?? 2) Download/install the latest TeensyDuino patch (1.59): ()
?? 3) Download/install the non-standard libraries. These are the ?.h files towards the top of the SDT.h header file that have URLs as comments on the #include lines.
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When you download the IDE, you are given the opportunity to make a donation to the Arduino people who continue to maintain and improve the IDE. I always make a donation whenever I download a new version. It's not required, but I think we should support them.
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Jack, W8TEE
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On Tuesday, April 8, 2025 at 06:03:41 AM EDT, Oliver KI3P via groups.io <oliver@...> wrote:
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That is a bizarre error and I am led to suspect your tool chain. Try setting up your environment according to the instructions in the README file and see if you still get this error.
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On Tuesday, April 8th, 2025 at 3:52 AM, glenn via groups.io <vk3pe@...> wrote:
Hi all,
Downloaded V66-9 today but get this error in line 695 of sdt.h
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Running IDE 1.8.19
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I'm a noob at arduino so appreciate assistance here please.
glenn
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--
Jack, W8TEE
--
Jack, W8TEE
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If you do not want to use a 30 pin ESP32 [Oliver is using a 38 pin version] here is a link for a 38 pin Expansion board.
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If you do not want to solder up an IDC cable Adafruit has a "10-pin IDC Socket Rainbow Breakout Cable"
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Or you can get a "10pin DIY JTAG IDC USB Logic Analyzer IC Test Clips Test Hook Grabber Test Probe" At Ali Express
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Might be able to construct a test stand from entirely purchased parts.
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Dick K9IVB
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Jack, Oliver,
I have IDE Vers 2.3.4 also on my PC which I have now tried, with same results.
?
I had already downloaded the non-standard LIBs to the versions shown.
I also had already installed the patch. V1.59
?
Still, on compile I get heaps of errors or at least text in the errors box ending with the same result as before.?
Line 695 in SDT.h Compilation error: expected '>' before numeric constant
?
I used the v66-9 download with no changes at this point to config.
?
Rather than fill this reply with the error message: I have put it into a DOC file, attached.
?
I'm sure it's something simple or stupid but when I get a pile of errors like that, my little knowledge, fails me !
?
Glenn
?
On Wed, Apr 9, 2025 at 12:52 AM, Jack, W8TEE wrote:
?
That is a very old version of the IDE and I would be surprised if the libraries are up-to-date. I would:
?
?? 1) Download/install the new Arduino IDE (2.3.5): ()
?? 2) Download/install the latest TeensyDuino patch (1.59): ()
?? 3) Download/install the non-standard libraries. These are the ?.h files towards the top of the SDT.h header file that have URLs as comments on the #include lines.
?
When you download the IDE, you are given the opportunity to make a donation to the Arduino people who continue to maintain and improve the IDE. I always make a donation whenever I download a new version. It's not required, but I think we should support them.
?
Jack, W8TEE
?
?
On Tuesday, April 8, 2025 at 06:03:41 AM EDT, Oliver KI3P via groups.io <oliver@...> wrote:
?
?
That is a bizarre error and I am led to suspect your tool chain. Try setting up your environment according to the instructions in the README file and see if you still get this error.
?
?
On Tuesday, April 8th, 2025 at 3:52 AM, glenn via groups.io <vk3pe@...> wrote:
Hi all,
Downloaded V66-9 today but get this error in line 695 of sdt.h
?
Running IDE 1.8.19
?
I'm a noob at arduino so appreciate assistance here please.
glenn
?
--
Jack, W8TEE
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I¡¯m a little lost on this discussion and have no idea how this got so twisted.? I have absolutely no issues with Paypal what-so-ever for any reason.? Mine works GREAT.? It¡¯s a commercial account and the only thing I can¡¯t do receive funds from a buyer using the ¡°Friends and family¡± option (because it IS a commercial account) ¡ but otherwise it works just fine. ? Shipping (not related to Paypal in any shape or form) is a completely different issue. ? ? 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 Kenneth Kanouse - WA2EPN via groups.io
Sent: Tuesday, April 8, 2025 6:58 PM
To: [email protected]
Subject: Re: [AmateurRadioBuilders] Reminder? Bill, Not sure why they complain about your account.? I live in Colombia with a US billing address in Orlando Florida and PayPal has my shipping address of my shipping company in Miami.? I've gotten an invoice from Bill on PayPal and not had an issue with it. ? My addressing is all done outside of Paypal¡ I only use Paypal for invoicing and payment collection.? Where and who it comes from means nothing to my system. ? BUT if it is a problem for some reason at your end, I also take Venmo, Zelle, Bank Transfers, etc.? I¡¯ve been doing this a lot of years so I know most of the ways around the problems.? The only one I have not been able to crack is shipments to the UK.? Because I am a registered business and have done (in the past) more than ¡°x¡± dollars of business in the UK¡ they require me to register there and collect VAT.? The only way for me to register is to either have an office with a street address there, or use a UK registration company (which for the little business I do there is outrageously expensive).? Not gonna happen. ? ? 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@... ? ? ? I'll try to explain the issue more clearly, Bill. A recent policy change by Paypal means that I am now unable to specify my forwarding agent in Oregon as the desired shipping address when making payment for goods and services. It insists on my using a shipping address here in Australia. That would mean Paypal would generate a shipping label that would require customs documentation etc, not a situation either of us want. We need a method that allows us to avoid this Paypal address issue. Perhaps your invoicing approach might offer an alternative. Are you reliant on the Paypal address label or can you? maunally enter an alternative address?
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John Owens K1JO
K9HZ
Alex Kindred, N7AWK
Jack, W8TEE