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Hi Everyone,
Had some good feedback on the versions 66.1 and 66.3. The attached update fixes the known problems.
Fixes include issues with the SSB transmit cal and power levels, which were caused primarily because of improper initial values. I tried these several times and everything appears to work properly.
The initial setup should be performed in the following order:
1. Frequency Cal
2. Receive cal
3.? Set SSB Power Level to 10W
4. Preliminary SSB PA Power cal to ensure levels are nearly correct
5. Transmit IQ calibration
6. Set CW Power level to 10W
7. CW PA Power level cal
8. Check SSB PA Power Cal. one final time
?
Again, it is best to erase the Teensy to start over with the new EEPRM values and be sure to uncomment line 3163 of the .ino file.? Comment out again after the initial download.
?
Other changes were primarily to fix a couple of the increments and to correct the on-screen text in a few spots.
?
A revised instructions PDF will follow.
Al
AC8GY
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Thanks Albert, SDT66_3 was the first build of the code that actually worked properly for me, appreciate all the hard work from yourself, Jack, Bill, Oliver and the others who have contributed to the T41. It's a great experimental radio !!
On Fri, 28 Feb 2025 at 13:26, Albert Peter via <albertfpeter= [email protected]> wrote: Hi Everyone,
Had some good feedback on the versions 66.1 and 66.3. The attached update fixes the known problems.
Fixes include issues with the SSB transmit cal and power levels, which were caused primarily because of improper initial values. I tried these several times and everything appears to work properly.
The initial setup should be performed in the following order:
1. Frequency Cal
2. Receive cal
3.? Set SSB Power Level to 10W
4. Preliminary SSB PA Power cal to ensure levels are nearly correct
5. Transmit IQ calibration
6. Set CW Power level to 10W
7. CW PA Power level cal
8. Check SSB PA Power Cal. one final time
?
Again, it is best to erase the Teensy to start over with the new EEPRM values and be sure to uncomment line 3163 of the .ino file.? Comment out again after the initial download.
?
Other changes were primarily to fix a couple of the increments and to correct the on-screen text in a few spots.
?
A revised instructions PDF will follow.
Al
AC8GY
?
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First impression is that 66.4 has cracked it.
?
Thanks
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Roger G8JWT
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For us Colonials who aren't too bright, what does "cracked it" mean?
Jack, W8TEE
On Friday, February 28, 2025 at 11:25:09 AM EST, bty84827531 via groups.io <roger.trett@...> wrote:
First impression is that 66.4 has cracked it.
?
Thanks
?
Roger G8JWT
-- Jack, W8TEE
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For us Colonials who aren't too bright, what does "cracked it" mean?
Jack, W8TEE
On Friday, February 28, 2025 at 11:25:09 AM EST, bty84827531 via groups.io <roger.trett@...> wrote:
First impression is that 66.4 has cracked it.
?
Thanks
?
Roger G8JWT
-- Jack, W8TEE
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You've solved the problem with TX calibrate!
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One thing I have just noticed is that RF Out Atten seems to work in reverse. The higher the number the greater the output.
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Roger G8JWT
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Roger,
It is working correctly, but the readout is confusing.
Next round I will fix it to read in dB, from 0 to -31dB.
Thanks,
Al
AC8GY
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Well you would want this to read out in WATTS¡ not db reduction¡ ? ? 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 Albert Peter via groups.io
Sent: Friday, February 28, 2025 11:44 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] T41 V66.4 with Code Revisions? It is working correctly, but the readout is confusing. Next round I will fix it to read in dB, from 0 to -31dB.
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Come now Jack.... I'm sure you have heard the term "cracked the case" before... same deal.... :))
Well you would want this to read out in WATTS¡ not db reduction¡ ? ? 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@... ? ? ? It is working correctly, but the readout is confusing. Next round I will fix it to read in dB, from 0 to -31dB.
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Hi Al, Ver 066_4 is a "Winner,Winner, Chicken Dinner" as a couple of T41 experts I know would say. I was able to calibrate Xmit IQ all bands without a problem using the receiver of my FT991A. Had a couple of minor issues, one with display, which you are probably aware of. When adjusting IQ Phase with .001 resolution the last digit appears to not being erased but overwritten with the new numbert and after a couple of twists of the dial you cannot read the number. I have also copied the EEPROM dump and SD card dump (attached PDF) after copying EEPROM to SD and it looks like a formatting issue in the EEPROM Dump first line. The 80M number seems to not being copied into the SD, throwing the number to band correlation off. Not sure how that would affect the order and placement and did not want to try coping the SD back to EEPROM for fear of shifting the placement order. Thanks again for getting this working correctly. Rick, KN4AIE On Fri, Feb 28, 2025 at 8:26?AM Albert Peter via groups.io <albertfpeter@...> wrote:
Hi Everyone,
Had some good feedback on the versions 66.1 and 66.3. The attached update fixes the known problems.
Fixes include issues with the SSB transmit cal and power levels, which were caused primarily because of improper initial values. I tried these several times and everything appears to work properly.
The initial setup should be performed in the following order:
1. Frequency Cal
2. Receive cal
3. Set SSB Power Level to 10W
4. Preliminary SSB PA Power cal to ensure levels are nearly correct
5. Transmit IQ calibration
6. Set CW Power level to 10W
7. CW PA Power level cal
8. Check SSB PA Power Cal. one final time
Again, it is best to erase the Teensy to start over with the new EEPRM values and be sure to uncomment line 3163 of the .ino file. Comment out again after the initial download.
Other changes were primarily to fix a couple of the increments and to correct the on-screen text in a few spots.
A revised instructions PDF will follow.
Al
AC8GY
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OK, just had not heard it used that way.
On Friday, February 28, 2025 at 02:35:08 PM EST, Peter McCracken EI3JCB via groups.io <peter.mccracken@...> wrote:
Come now Jack.... I'm sure you have heard the term "cracked the case" before... same deal.... :))
Well you would want this to read out in WATTS¡ not db reduction¡ ? ? 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@... ? ? ? It is working correctly, but the readout is confusing. Next round I will fix it to read in dB, from 0 to -31dB.
--
Jack, W8TEE
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This needs to be verified with others, I get same BPF for 17 and 10M.
17M BP looks OK?
10M it selects 17M filter bank.
I was about to pull all the torroids off and start over, I had another BPF board that uses BCD, (I installed 0 resistors and cut feed back to main) and it did exactly the same.
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Ver 66.? I think 66.4
Tim W4YN?
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You can check the software to ensure that it didn't get messed up somehow. In BPF_Control.h, make sure that the definitions of the control words for those bands are OK:
#define BPF_BAND_10M ? ?0x0002#define BPF_BAND_17M ? ?0x4000
Then, in BPF_Control.cpp, make sure that setBPFBand applies those control words:
? ? case BAND_17M:? ? ? BPF_GPAB_state = BPF_BAND_17M; ? ? ? break; ? ? ... ? ? case BAND_10M: ? ? ? BPF_GPAB_state = BPF_BAND_10M; ????? break;
Finally, check that your definition of the bands structure in the ino file hasn't got messed up. Look for the bit that starts with this line: struct band bands[NUMBER_OF_BANDS] =
If all those are correct, then the problem is in hardware. I'd look for a solder short somewhere in this part of the board:
The anode of D1 should go high when the 17m band is selected -- all other diode anodes should be low. The anode of D4 should go high when the 10m band is selected.
On Monday, March 17th, 2025 at 4:01 PM, Tim via groups.io <w4yn@...> wrote:
This needs to be verified with others, I get same BPF for 17 and 10M.
17M BP looks OK?
10M it selects 17M filter bank.
I was about to pull all the torroids off and start over, I had another BPF board that uses BCD, (I installed 0 resistors and cut feed back to main) and it did exactly the same.
?
Ver 66.? I think 66.4
Tim W4YN?
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Tnx OM I will start checking!
Tim?
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Something is wrong. ?The hardware is set up to select 17M and 10M differently. ? The truth table in in the design note directory, the I2C addresses document, the LPF tab. ?
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@... ?
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On Mar 17, 2025, at 3:01?PM, Tim via groups.io <w4yn@...> wrote:
? This needs to be verified with others, I get same BPF for 17 and 10M.
17M BP looks OK?
10M it selects 17M filter bank.
I was about to pull all the torroids off and start over, I had another BPF board that uses BCD, (I installed 0 resistors and cut feed back to main) and it did exactly the same.
?
Ver 66.? I think 66.4
Tim W4YN?
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Hardware was issue.
I was testing 3rd party BPF that uses same bcd code as ours.
Looking for short now.
Tim
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It is hardware issue.?
I am testing 3rd party BPF?
BCD input code is same as yours.
Tracing for short now.
Tim
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jjpurdum
K9HZ