Made my first contact!!!!!!!!!!!!!? Got good audio report, so the noise in the background was not noticed.
On to calibrate the SWR
dave, n3ds
|
Thank you, Oliver, your fixes all worked very well.? Those that you fixed have been ¡°Bugging¡± ha, ha, me for a while. Rick Price KN4AIE ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Wednesday, April 9, 2025 6:30 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Freq Calibration? Missed your original message Rick, sorry about that. This was a fun one* to track down. It turned out to be due to the logic flag that tracks whether the main menu is still active. It was being left TRUE when exiting the menu windows instead of being reset to FALSE. See this line for the place where this bug intersects with the encoder reading code: I fixed it by just before returning from SetSecondaryMenuIndex() in Menu.cpp: mainMenuWindowActive = false; On Tuesday, April 8th, 2025 at 8:42 PM, Rick Price via groups.io <rickprice48@...> wrote:
Oliver, as long as your fixing some minor bugs¡. When the radio is turned on and have not selected any matrix buttons the audio filter tune works correctly. After selecting any matrix button the filter tune adjustment reverses direction and the amount of increment movement for any rotational movement is divided by at least 10. Turn the radio off and right back on filter tune works correctly until a matrix button is selected and the above happens again. Don¡¯t know if you saw my add on earlier about selecting CW and having the fine tune increment cycle with each CW selection and cancellation. Maybe you have already addressed that with the changes you just made. I will download the new bug fixes and let you know if it is still doing it. Rick, KN4AIE ? ? I've fixed this one too. Added a call to ResetTuning() at line 33 of MenuProc.cpp -- i.e., reset the tuning right before calling CalibrateFrequency(). See the changed line on GitHub here: On Tuesday, April 8th, 2025 at 6:47 PM, Oliver KI3P via groups.io <oliver@...> wrote: No reason for it, it's just another bug that needs to be squashed. On Tuesday, April 8th, 2025 at 11:51 AM, K9HZ <bill@...> wrote: ¡°The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset.¡± ? I didn¡¯t catch that either¡ any reason for that. Seems a bit quirky¡ ? ? 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@... ? ? ? Are you saying that if you tune to 10 MHz and select SAM demodulation, you measure a frequency offset of 190 Hz? A gotcha with the frequency calibration is that it matters how you tune to 10 MHz -- don't touch the fine tune knob! The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset. Instead, tune by pressing the Dir Freq (Direct Frequency) button and entering 10 on the button pad. Does that help? On Monday, April 7th, 2025 at 8:35 PM, epif18 via groups.io <epif18@...> wrote: I'm running a V12, 66.9, TCXO.? I've run freq cal and I'm off by 190 hz.? I've hard coded the cal value into si5351.init as well as 0.0.? The 190 hz error shows against my freq standard (10MHz) as well as my Siglent sig gen.? Zero beat is at 10,000,190. And when I'm listening to some SSB net on 20M, the best audio comes in at +190 hz (assuming they run the net on a whole freq).? Freq cal shows an error of 0.15Hz throughout the 20 min.? I adjust the cal factor to a freq error of 0.15Hz before I start cal.? I've run cal multiple time with the same results.? Everything is temp stabilized. 190 Hz isn't that bad but I'd like it to be close to zero.
?
?
?
?
|
Re: Updated 3rd Edition book NOT shipping from Amazon yet
Duane:
There should be no stock as it is a "Print on Demand" book. Tell then to check for Chapter 20, because earlier versions don't have a chapter 20.
Jack, W8TEE
On Wednesday, April 9, 2025 at 09:57:26 AM EDT, Duane B via groups.io <dbrantley@...> wrote:
Hi Jack.
?
I ordered it on April 5th.? It was delivered on the 8th.? I plan to return it.? Was going to give them a couple of days to deplete what stock they have.
?
Duane - K5CA
-- Jack, W8TEE
|
Re: T41 V9 troubleshooting guide
Thanks for all the replies.? I have downloaded and printed the Assembly manual that Greg linked (thanks!). ?? I'll let you know how progress is going with the resurrection of this T41.? I will be building my own with K9HZ's board set.
?
Duane - K5CA
|
Re: Updated 3rd Edition book NOT shipping from Amazon yet
Hi Jack.
?
I ordered it on April 5th.? It was delivered on the 8th.? I plan to return it.? Was going to give them a couple of days to deplete what stock they have.
?
Duane - K5CA
|
Re: Updated 3rd Edition book NOT shipping from Amazon yet
Return it and have them send the latest version. They are not shipping out of inventory because there is none. Our book is a "print on demand" book that has no inventory. When did you order the book?
Jack, W8TEE
On Wednesday, April 9, 2025 at 09:25:59 AM EDT, Duane B via groups.io <dbrantley@...> wrote:
Just wanted to let everyone know that Amazon is NOT shipping the latest 3rd Edition of the book, at I didn't receive one.? Maybe they are trying to get rid on the 'old' Third Edition copies first?
?
Duane - K5CA
-- Jack, W8TEE
|
Updated 3rd Edition book NOT shipping from Amazon yet
Just wanted to let everyone know that Amazon is NOT shipping the latest 3rd Edition of the book, at I didn't receive one.? Maybe they are trying to get rid on the 'old' Third Edition copies first?
?
Duane - K5CA
|
Missed your original message Rick, sorry about that.
This was a fun one* to track down. It turned out to be due to the logic flag that tracks whether the main menu is still active. It was being left TRUE when exiting the menu windows instead of being reset to FALSE. See this line for the place where this bug intersects with the encoder reading code:
I fixed it by just before returning from SetSecondaryMenuIndex() in Menu.cpp:
mainMenuWindowActive = false;
Cheers, Oliver KI3P
*sarcasm
On Tuesday, April 8th, 2025 at 8:42 PM, Rick Price via groups.io <rickprice48@...> wrote:
Oliver, as long as your fixing some minor bugs¡. When the radio is turned on and have not selected any matrix buttons the audio filter tune works correctly. After selecting any matrix button the filter tune adjustment reverses direction and the amount of increment movement for any rotational movement is divided by at least 10. Turn the radio off and right back on filter tune works correctly until a matrix button is selected and the above happens again. Don¡¯t know if you saw my add on earlier about selecting CW and having the fine tune increment cycle with each CW selection and cancellation. Maybe you have already addressed that with the changes you just made. I will download the new bug fixes and let you know if it is still doing it. Rick, KN4AIE ? ? I've fixed this one too. Added a call to ResetTuning() at line 33 of MenuProc.cpp -- i.e., reset the tuning right before calling CalibrateFrequency(). See the changed line on GitHub here: On Tuesday, April 8th, 2025 at 6:47 PM, Oliver KI3P via groups.io <oliver@...> wrote:
No reason for it, it's just another bug that needs to be squashed. On Tuesday, April 8th, 2025 at 11:51 AM, K9HZ <bill@...> wrote:
¡°The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset.¡± ? I didn¡¯t catch that either¡ any reason for that. Seems a bit quirky¡ ? ? 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@... ? ? ? Are you saying that if you tune to 10 MHz and select SAM demodulation, you measure a frequency offset of 190 Hz? A gotcha with the frequency calibration is that it matters how you tune to 10 MHz -- don't touch the fine tune knob! The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset. Instead, tune by pressing the Dir Freq (Direct Frequency) button and entering 10 on the button pad. Does that help? On Monday, April 7th, 2025 at 8:35 PM, epif18 via groups.io <epif18@...> wrote: I'm running a V12, 66.9, TCXO.? I've run freq cal and I'm off by 190 hz.? I've hard coded the cal value into si5351.init as well as 0.0.? The 190 hz error shows against my freq standard (10MHz) as well as my Siglent sig gen.? Zero beat is at 10,000,190. And when I'm listening to some SSB net on 20M, the best audio comes in at +190 hz (assuming they run the net on a whole freq).? Freq cal shows an error of 0.15Hz throughout the 20 min.? I adjust the cal factor to a freq error of 0.15Hz before I start cal.? I've run cal multiple time with the same results.? Everything is temp stabilized. 190 Hz isn't that bad but I'd like it to be close to zero.
?
?
?
|
|
|
Oliver, as long as your fixing some minor bugs¡. When the radio is turned on and have not selected any matrix buttons the audio filter tune works correctly.? After selecting any matrix button the filter tune adjustment reverses direction and the amount of increment movement for any rotational movement is divided by at least 10.? Turn the radio off and right back on filter tune works correctly until a matrix button is selected and the above happens again.? Don¡¯t know if you saw my add on earlier about selecting CW and having the fine tune increment cycle with each CW selection and cancellation.? Maybe you have already addressed that with the changes you just made. I will download the new bug fixes and let you know if it is still doing it. Rick, KN4AIE ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Tuesday, April 8, 2025 8:04 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Freq Calibration? I've fixed this one too. Added a call to ResetTuning() at line 33 of MenuProc.cpp -- i.e., reset the tuning right before calling CalibrateFrequency(). See the changed line on GitHub here: On Tuesday, April 8th, 2025 at 6:47 PM, Oliver KI3P via groups.io <oliver@...> wrote:
No reason for it, it's just another bug that needs to be squashed. On Tuesday, April 8th, 2025 at 11:51 AM, K9HZ <bill@...> wrote:
¡°The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset.¡± ? I didn¡¯t catch that either¡ any reason for that. Seems a bit quirky¡ ? ? 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@... ? ? ? Are you saying that if you tune to 10 MHz and select SAM demodulation, you measure a frequency offset of 190 Hz? A gotcha with the frequency calibration is that it matters how you tune to 10 MHz -- don't touch the fine tune knob! The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset. Instead, tune by pressing the Dir Freq (Direct Frequency) button and entering 10 on the button pad. Does that help? On Monday, April 7th, 2025 at 8:35 PM, epif18 via groups.io <epif18@...> wrote: I'm running a V12, 66.9, TCXO.? I've run freq cal and I'm off by 190 hz.? I've hard coded the cal value into si5351.init as well as 0.0.? The 190 hz error shows against my freq standard (10MHz) as well as my Siglent sig gen.? Zero beat is at 10,000,190. And when I'm listening to some SSB net on 20M, the best audio comes in at +190 hz (assuming they run the net on a whole freq).? Freq cal shows an error of 0.15Hz throughout the 20 min.? I adjust the cal factor to a freq error of 0.15Hz before I start cal.? I've run cal multiple time with the same results.? Everything is temp stabilized. 190 Hz isn't that bad but I'd like it to be close to zero.
?
?
?
|
I've fixed this one too. Added a call to ResetTuning() at line 33 of MenuProc.cpp -- i.e., reset the tuning right before calling CalibrateFrequency(). See the changed line on GitHub here:
On Tuesday, April 8th, 2025 at 6:47 PM, Oliver KI3P via groups.io <oliver@...> wrote:
No reason for it, it's just another bug that needs to be squashed.
On Tuesday, April 8th, 2025 at 11:51 AM, K9HZ <bill@...> wrote:
¡°The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset.¡± ? I didn¡¯t catch that either¡ any reason for that. Seems a bit quirky¡ ? ? 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@... ? ? ? Are you saying that if you tune to 10 MHz and select SAM demodulation, you measure a frequency offset of 190 Hz? A gotcha with the frequency calibration is that it matters how you tune to 10 MHz -- don't touch the fine tune knob! The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset. Instead, tune by pressing the Dir Freq (Direct Frequency) button and entering 10 on the button pad. Does that help? On Monday, April 7th, 2025 at 8:35 PM, epif18 via groups.io <epif18@...> wrote:
I'm running a V12, 66.9, TCXO.? I've run freq cal and I'm off by 190 hz.? I've hard coded the cal value into si5351.init as well as 0.0.? The 190 hz error shows against my freq standard (10MHz) as well as my Siglent sig gen.? Zero beat is at 10,000,190. And when I'm listening to some SSB net on 20M, the best audio comes in at +190 hz (assuming they run the net on a whole freq).? Freq cal shows an error of 0.15Hz throughout the 20 min.? I adjust the cal factor to a freq error of 0.15Hz before I start cal.? I've run cal multiple time with the same results.? Everything is temp stabilized. 190 Hz isn't that bad but I'd like it to be close to zero.
?
|
OK, I tracked it down and fixed it. Update code here:
I removed one line in Display.cpp under UpdateInfoWindow(). There was a call to UpdateIncrementField() that automatically increments the Fine Tune setting, so I removed it.
On Tuesday, April 8th, 2025 at 6:41 PM, Oliver KI3P via groups.io <oliver@...> wrote:
Thanks, that's definitely a bug! I can recreate it on my radio. Will track it down and squash it.
On Tuesday, April 8th, 2025 at 2:20 PM, bty84827531 via groups.io <roger.trett@...> wrote:
By pressing the select/enter button (top left).
?
Roger G8JWT
|
I've noticed that the noise floor in my receive spectrum varies, too, when I change the grounding of my radio.? I¡¯ve been fighting this a little bit too.? Running heavy shields between the boards helps somewhat for my radios¡ but having the A/D and D/A on the RF board might have been a smarter move on our part.? Its hard to tell without trying it.? The second receiver is more-quiet than the first and that is where mt data comes from (Its away from the main board)¡That combined with super low noise voltage regulators may make all the difference. ? ? 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@... ? ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Tuesday, April 8, 2025 5:50 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Transmitting noise? I've noticed that the noise floor in my receive spectrum varies substantially when I change the grounding of my radio. I presume that the same thing is happening on the transmit side. I've not been able to devote any time to systematically exploring why this might be. On Tuesday, April 8th, 2025 at 4:10 PM, D Solt via groups.io <davesolt@...> wrote:
This is similar to what I am getting. Do you know how to get rid of it? I notice that when I connect my HP signal generator, the background noise disappears and I have a clean sine wave with no noise. ? The frequency calibration of my HackRF One is a little bit off, but here's what the audio sounds like from my radio (see attached WAV file). I haven't done anything to try to improve the mic. On Saturday, April 5th, 2025 at 10:32 AM, Oliver KI3P via <oliver=[email protected]> wrote:
If I connect a broadband power meter to the output of my radio I measure the following: State | Power [dBm] | Calculated RMS Voltage [V] | Measurement configuration | PTT not pressed | -47 | 9.99E-04 | No attenuation | PTT pressed, no sound | 4 | 0.35 | Added 40 dB of attenuation | PTT pressed, speaking | 40 | 22.4 | Added 60 dB of attenuation |
? So I get roughly similar numbers. If I connect an oscilloscope across a 50 Ohm load connected to the antenna output I see the following waveform when I start PTT with no mic connected, SSB mode at 14.1 MHz. I don't see a signal that exponentially decays in 5 ms. If I press the PTT while whistling loudly, the waveform looks like this (note the change in vertical scale from 5 to 20V per division): ? On Friday, April 4th, 2025 at 4:12 PM, D Solt via <davesolt=[email protected]> wrote:
I am getting about 50mv noise out of the 20W amp in SSB with PTT engaged; no mic plugged in. I'm running version 66.9 and am all calibrated. Additionally, when PTT is engaged there is a burst of signal (about500mv) that exponentially decays in 5ms. The audio sounds pretty rough on my other radio, but wonder if that is because of such close proximity. Amplitude is affected by MIC GAIN. Any thoughts?
?
?
?
|
I've noticed that the noise floor in my receive spectrum varies substantially when I change the grounding of my radio. I presume that the same thing is happening on the transmit side. I've not been able to devote any time to systematically exploring why this might be.
On Tuesday, April 8th, 2025 at 4:10 PM, D Solt via groups.io <davesolt@...> wrote:
Oliver, This is similar to what I am getting. Do you know how to get rid of it? I notice that when I connect my HP signal generator, the background noise disappears and I have a clean sine wave with no noise. dave
The frequency calibration of my HackRF One is a little bit off, but here's what the audio sounds like from my radio (see attached WAV file). I haven't done anything to try to improve the mic.
On Saturday, April 5th, 2025 at 10:32 AM, Oliver KI3P via <oliver= [email protected]> wrote:
If I connect a broadband power meter to the output of my radio I measure the following:
| State |
Power [dBm] |
Calculated RMS Voltage [V] |
Measurement configuration |
| PTT not pressed |
-47 |
9.99E-04 |
No attenuation |
| PTT pressed, no sound |
4 |
0.35 |
Added 40 dB of attenuation |
| PTT pressed, speaking |
40 |
22.4 |
Added 60 dB of attenuation |
So I get roughly similar numbers.
If I connect an oscilloscope across a 50 Ohm load connected to the antenna output I see the following waveform when I start PTT with no mic connected, SSB mode at 14.1 MHz. I don't see a signal that exponentially decays in 5 ms.
If I press the PTT while whistling loudly, the waveform looks like this (note the change in vertical scale from 5 to 20V per division):
On Friday, April 4th, 2025 at 4:12 PM, D Solt via <davesolt= [email protected]> wrote:
I am getting about 50mv noise out of the 20W amp in SSB with PTT engaged; no mic plugged in. I'm running version 66.9 and am all calibrated. Additionally, when PTT is engaged there is a burst of signal (about500mv) that exponentially decays in 5ms. The audio sounds pretty rough on my other radio, but wonder if that is because of such close proximity. Amplitude is affected by MIC GAIN. Any thoughts?
dave, n3ds
|
No reason for it, it's just another bug that needs to be squashed.
On Tuesday, April 8th, 2025 at 11:51 AM, K9HZ <bill@...> wrote:
¡°The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset.¡± ? I didn¡¯t catch that either¡ any reason for that. Seems a bit quirky¡ ? ? 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@... ? ? ? Are you saying that if you tune to 10 MHz and select SAM demodulation, you measure a frequency offset of 190 Hz? A gotcha with the frequency calibration is that it matters how you tune to 10 MHz -- don't touch the fine tune knob! The math under the hood in the frequency calibration routine doesn't account for the fine tune frequency offset. Instead, tune by pressing the Dir Freq (Direct Frequency) button and entering 10 on the button pad. Does that help? On Monday, April 7th, 2025 at 8:35 PM, epif18 via groups.io <epif18@...> wrote:
I'm running a V12, 66.9, TCXO.? I've run freq cal and I'm off by 190 hz.? I've hard coded the cal value into si5351.init as well as 0.0.? The 190 hz error shows against my freq standard (10MHz) as well as my Siglent sig gen.? Zero beat is at 10,000,190. And when I'm listening to some SSB net on 20M, the best audio comes in at +190 hz (assuming they run the net on a whole freq).? Freq cal shows an error of 0.15Hz throughout the 20 min.? I adjust the cal factor to a freq error of 0.15Hz before I start cal.? I've run cal multiple time with the same results.? Everything is temp stabilized. 190 Hz isn't that bad but I'd like it to be close to zero.
?
|
Thanks, that's definitely a bug! I can recreate it on my radio. Will track it down and squash it.
On Tuesday, April 8th, 2025 at 2:20 PM, bty84827531 via groups.io <roger.trett@...> wrote:
By pressing the select/enter button (top left).
?
Roger G8JWT
|
Love this new format! 
Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com
email:??bill@... ?
|
Oliver, This is similar to what I am getting.? Do you know how to get rid of it?? I notice that when I connect my HP signal generator, the background noise disappears and I have a clean sine wave with no noise. dave
The frequency calibration of my HackRF One is a little bit off, but here's what the audio sounds like from my radio (see attached WAV file). I haven't done anything to try to improve the mic.
On Saturday, April 5th, 2025 at 10:32 AM, Oliver KI3P via <oliver= [email protected]> wrote:
If I connect a broadband power meter to the output of my radio I measure the following:
| State |
Power [dBm] |
Calculated RMS Voltage [V] |
Measurement configuration |
| PTT not pressed |
-47 |
9.99E-04 |
No attenuation |
| PTT pressed, no sound |
4 |
0.35 |
Added 40 dB of attenuation |
| PTT pressed, speaking |
40 |
22.4 |
Added 60 dB of attenuation |
So I get roughly similar numbers.
If I connect an oscilloscope across a 50 Ohm load connected to the antenna output I see the following waveform when I start PTT with no mic connected, SSB mode at 14.1 MHz. I don't see a signal that exponentially decays in 5 ms.
If I press the PTT while whistling loudly, the waveform looks like this (note the change in vertical scale from 5 to 20V per division):
On Friday, April 4th, 2025 at 4:12 PM, D Solt via <davesolt= [email protected]> wrote:
I am getting about 50mv noise out of the 20W amp in SSB with PTT engaged; no mic plugged in.? I'm running version 66.9 and am all calibrated.? Additionally, when PTT is engaged there is a burst of signal (about500mv) that exponentially decays in 5ms.? The audio sounds pretty rough on my other radio, but wonder if that is because of such close proximity.? Amplitude is affected by MIC GAIN.? Any thoughts?
dave, n3ds
|
Re: T41 V9 troubleshooting guide
Dave Cripe made some changes to the 4SQRP boards and they were V09 versions. ?Greg has provided a link to the build instructions that 4States provided that show V09. ?I thot that some in my kit were marked V10 but I had purchased a set of those before I got
the kit from AG1P who has since become an SK. ?
I was doing well with my kit until the display
died about a year ago. ?Got a replacement but never did discover the fault so it¡¯s on the shelf with a number of other things this old duffer has screwed up. ?
The estate sale should provide some great opportunities for some young engineer.
73
Jim w0nkn
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Show quoted text
On Apr 8, 2025, at 1:12?PM, jjpurdum via groups.io <jjpurdum@...> wrote:
?
Check with Al, but I think that was the number we used on the first batch of boards we produced for the Beta T41
On Tuesday, April 8, 2025 at 02:05:48 PM EDT, K9HZ <bill@...> wrote:
Huh well then what is a V9?
?
?
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 don't think so. That was V10.
On Tuesday, April 8, 2025 at 01:31:10 PM EDT, K9HZ <bill@...> wrote:
Version 9?? Not familiar with that¡? Maybe that was a 4SQRP radio?
?
?
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@...
?
?
?
A co-worker purchased a V9 T41, but its not completely operational.? I know this is a few revs back, but is there a (per board) check
out/troubleshooting guide somewhere for that rev??? Something with test point voltages?
--
Jack, W8TEE
--
Jack, W8TEE
|
Re: Radiated EMI from displays
Sure¡ Hopefully I get better at the code for the design¡ Its been years since I used G-code for anything. ? ? 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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Show quoted text
From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io
Sent: Tuesday, April 8, 2025 1:14 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Radiated EMI from displays? If you make one for the 7" display, put me down for one. On Tuesday, April 8, 2025 at 01:58:13 PM EDT, K9HZ <bill@...> wrote: I finally got my 4-axis CNC machine fired up last night and the first thing it made was a box for the back of my radio with a 5¡± display based on John Lundberg¡¯s work.? I¡¯m pretty excited about this even though it turned out to be a disaster (idiot G-coder me)¡ but it was a step forward.? I have buckets full of scrap PCB to work from to work with to get this right¡ ?but my rather crude test measurements confirm Terrance¡¯s assertion that it is, indeed, worth about 20 db noise floor reduction on the upper bands to placing the entire display into a shielded box. ? I have a young hot-shot engineer that started working for my engineering consulting company this week¡ and I think I will put him on this project¡ to get him up to speed with our lab.? I¡¯d rather work on the 100W amp getting those kitted and finalize the Auto Tuner.? [BTW, anyone want to work along with us to see how that project comes together? I¡¯ll start a #Tuner thread for 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@... ? ? ? Another way to test this is to disconnect the display altogether.? This can't be done with the existing software as the code will hang trying to start the RA8875 object.? However, in developing the T41 Beacon Monitor, I created a version of the T41 software that doesn't update the display, though the RA8875 object was still there to display the Beacon Monitor.? With a bit of work, I separated that portion of the display code as well.? I can now completely disconnect the display.? It's not too hard to print the S-meter value to the serial monitor, but controlling the radio without a display is a bit of a guess.? That's where my comes in handy.? With that I see a 10 to 20 dB reduction in the noise floor on the upper bands of the 4SQRP without its 5" display.? This seems consistent with the results that John posted. I need to repeat this with my v12.
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Jack, W8TEE
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jjpurdum
K9HZ