Re: LPF-Control PCB TX Logic at U3 & U7
Hey yall',
I ran the LPF test .ino along with the K9HZ LPF Prototype Test Report using MAIN and all modes and functions pass.? So all LPF control board HW works with in-band loss for LPF about -0.5db and -2.5db for BPF.? I've run the RX using LPF directly (not thru the control board) and thru the BPF.? Works great, all filters switch fine !!!!!? Now need to troubleshoot the control board using 66.4. I'm using V12, single RX.? Looks like there are issues out there.? Any specifics?? Modes? TX to RX?? Right now I'm guessing there are issues with 66.4.
Mark
KU3O
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I have some but its stashed away in the office I¡¯m moving¡? and of course, I just had a colonoscopy 4 hours ago¡ so will find it in a few days.? What I know is that we are at the limits of the followers, filters, the LO, the RF Amp.? If there is a better part for the mixer, I¡¯m all ears¡ ? Check out the schematics for the Elecraft KX3¡ I got a few hints from that¡ ? ? 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 Bob Larkin
Sent: Friday, March 21, 2025 5:54 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Tiny Ten Transceiver? The DC operating point would seem to be that of Fig 1 of the data sheet for the PSA-8A+.? But that is fine, either way.? I was hoping to get some data on noise level data of other implementations of the QSD without any RF amplifier to see if I am fighting a general problem or something I created.?? Any sort of noise level vs frequency or S/N or MDS or that sort of data without the RF amp, if available would be helpful.?? Many thanks, Bob
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The DC operating point would seem to be that of Fig 1 of the data sheet for the PSA-8A+.? But that is fine, either way.? I was hoping to get some data on noise level data of other implementations of the QSD without any RF amplifier to see if I am fighting a general problem or something I created.?? Any sort of noise level vs frequency or S/N or MDS or that sort of data without the RF amp, if available would be helpful.?? Many thanks, Bob
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Ok so what's the problem then?
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: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email: bill@...
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of jerry-KF6VB Sent: Friday, March 21, 2025 4:52 PM To: [email protected]Cc: K9HZ <bill@...> Subject: Re: [SoftwareControlledHamRadio] CW Side tone On 2025-03-21 14:19, K9HZ wrote: Why isn't this a menu item?
*** It is. It's also one of the settings accessible by poking at the volume control knob switch. - Jerry
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: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email: bill@...
-----Original Message-----
From: [email protected]
<[email protected]> On Behalf Of jerry-KF6VB
Sent: Friday, March 21, 2025 12:32 PM
To: [email protected]
Cc: Paul Michel via groups.io <pm1430967@...>
Subject: Re: [SoftwareControlledHamRadio] CW Side tone
On 2025-03-21 05:17, Paul Michel via groups.io wrote:
My CW side tone is very loud, the volume setting in the CW menu does
not have any affect. I am using V12 boards and running Ver 50.2.
Any ideas on what to look for? *** Yeah, there's a line you need to change in the .ino file.
Inside setup_cw_transmit_mode()
you will see something like: sidetone_oscillator.amplitude( 1 );
Replace it with:
sidetone_oscillator.amplitude( sidetoneVolume / 500 );
- Jerry, KF6VB
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¡°this puts 30+ dB of gain right ahead of the QSD?¡±? no no no¡ its operating at a voltage that provides much less gain¡? ? ? 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 Bob Larkin
Sent: Friday, March 21, 2025 1:30 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Tiny Ten Transceiver? Thank you much for the comments.? This is all most useful in understanding the operation and limitations of QSD/Tayloe receivers. I went back and spent some time with theT41 schematics.? Q: Do you have noise measurements of the T41 circuitry *without* the U2 RF amplifier??? This is where I am running into problems.? If I read the schematic correctly, this puts 30+ dB of gain right ahead of the QSD?? That would cover noise issues, and thus the question. Don't do anything special if you don't have data.? I will continue with Tiny Ten measurements and post those.
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Re: Tx-Rx logic on LPF-Control
First, R8-R11 should NOT BE POPULATED under I2C control.? ?U15 pins GPA0 and GPA1 should ALTERNATE STATE.? NOTHING should be plugged into J1 unless it LISTENS ONLY. ???U3 and U7 appear to be working correctly¡ ? I think something happened the software and I need to have Oliver look into this because its happening to everyone and just after the last version of the software was released. Sorry just finished a colonoscopy so a little out of 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: Friday, March 21, 2025 2:56 PM
To: [email protected]
Subject: [SoftwareControlledHamRadio] Tx-Rx logic on LPF-Control? In my efforts to track a PA oscillation problem I noticed that in the SSB mode, the receive solid state switches (U1 & U8 on the LPF-Cntl) do not change state when the PTT is engaged but the transmit SSS's (U3 & U7) do change state.? I'm using ver 66.4.? In the CW mode, all 4 SSS's change state on key down.? I would expect all the switches to change state in CW and SSB so that the BPF is used in Tx and Rx.? Am I understanding this correctly?
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On 2025-03-21 14:19, K9HZ wrote: Why isn't this a menu item?
*** It is. It's also one of the settings accessible by poking at the volume control knob switch. - Jerry 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: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email:? bill@...
-----Original Message-----
From: [email protected]
<[email protected]> On Behalf Of jerry-KF6VB
Sent: Friday, March 21, 2025 12:32 PM
To: [email protected]
Cc: Paul Michel via groups.io <pm1430967@...>
Subject: Re: [SoftwareControlledHamRadio] CW Side tone
On 2025-03-21 05:17, Paul Michel via groups.io wrote:
My CW side tone is very loud, the volume setting in the CW menu does
not have any affect. I am using V12 boards and running Ver 50.2.
Any ideas on what to look for? *** Yeah, there's a line you need to change in the .ino file.
Inside setup_cw_transmit_mode()
you will see something like: sidetone_oscillator.amplitude( 1 );
Replace it with:
sidetone_oscillator.amplitude( sidetoneVolume / 500 );
- Jerry, KF6VB
|
Why isn't this a menu item?
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: www.VillaGrandPiton.com
Moderator: North American QRO Group at Groups.IO.
Moderator: Amateur Radio Builders Group at Groups.IO.
email:? bill@...
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected]< [email protected]> On Behalf Of jerry-KF6VB Sent: Friday, March 21, 2025 12:32 PM To: [email protected]Cc: Paul Michel via groups.io <pm1430967@...> Subject: Re: [SoftwareControlledHamRadio] CW Side tone On 2025-03-21 05:17, Paul Michel via groups.io wrote: My CW side tone is very loud, the volume setting in the CW menu does
not have any affect. I am using V12 boards and running Ver 50.2.
Any ideas on what to look for? *** Yeah, there's a line you need to change in the .ino file. Inside setup_cw_transmit_mode() you will see something like: sidetone_oscillator.amplitude( 1 ); Replace it with: sidetone_oscillator.amplitude( sidetoneVolume / 500 ); - Jerry, KF6VB
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Re: Tx-Rx logic on LPF-Control
Folks who are having issues with PA oscillations, do you see it on the beta version of the Ver66-9 code?
And if you, does it go away if you comment out this line and uncomment the next one?
i.e.,? this should be: setBPFPath(BPF_IN_RX_PATH);
//setBPFPath(BPF_NOT_IN_PATH);
On Friday, March 21st, 2025 at 3:56 PM, D Solt via groups.io <davesolt@...> wrote:
In my efforts to track a PA oscillation problem I noticed that in the SSB mode, the receive solid state switches (U1 & U8 on the LPF-Cntl) do not change state when the PTT is engaged but the transmit SSS's (U3 & U7) do change state.? I'm using ver 66.4.? In the CW mode, all 4 SSS's change state on key down.? I would expect all the switches to change state in CW and SSB so that the BPF is used in Tx and Rx.? Am I understanding this correctly?
dave, n3ds
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Tx-Rx logic on LPF-Control
In my efforts to track a PA oscillation problem I noticed that in the SSB mode, the receive solid state switches (U1 & U8 on the LPF-Cntl) do not change state when the PTT is engaged but the transmit SSS's (U3 & U7) do change state.? I'm using ver 66.4.? In the CW mode, all 4 SSS's change state on key down.? I would expect all the switches to change state in CW and SSB so that the BPF is used in Tx and Rx.? Am I understanding this correctly?
dave, n3ds
|
Thank you much for the comments.? This is all most useful in understanding the operation and limitations of QSD/Tayloe receivers.
?
I went back and spent some time with theT41 schematics.? Q: Do you have noise measurements of the T41 circuitry *without* the U2 RF amplifier??? This is where I am running into problems.? If I read the schematic correctly, this puts 30+ dB of gain right ahead of the QSD?? That would cover noise issues, and thus the question.
?
Don't do anything special if you don't have data.? I will continue with Tiny Ten measurements and post those.
?
73, Bob? W7PUA
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Re: boards and kits and stuff
Sounds very interesting. Alas, I know nothing about FPGA, but wish I did.
Jack, W8TEE
On Friday, March 21, 2025 at 11:50:27 AM EDT, rebruhnke via groups.io <rebruhnke@...> wrote:
Jack, one version of my radio (it has been in progress for 10 years!) did use the Raspberry PI for the display. I used Python and it worked quite well. Hated the? boot time so I looked at other options.? My radio, up until now, always used a DSPIC as the RX and TX processor, modeled somewhat from the SDRCube project. Another processor has always been used for the UI. I even split the audio processing up with another DSPIC. An FPGA has always been the frequency/down/up convertor.? Next iteration used an ARM (Microchip again) running at 300MHz for the UI and that worked quite well. The current iteration uses two Teensys, one for the UI and the other in place of the DSPIC.
?
Russ
-- Jack, W8TEE
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On 2025-03-21 05:17, Paul Michel via groups.io wrote: My CW side tone is very loud, the volume setting in the CW menu does
not have any affect. I am using V12 boards and running Ver 50.2.
Any ideas on what to look for? *** Yeah, there's a line you need to change in the .ino file. Inside setup_cw_transmit_mode() you will see something like: sidetone_oscillator.amplitude( 1 ); Replace it with: sidetone_oscillator.amplitude( sidetoneVolume / 500 ); - Jerry, KF6VB
|
Re: boards and kits and stuff
Actually it didnt originally dawn on me to use the parallel bus for the display bit it makes a lot of sense to do that and dedicate a processor to it. ?I may take a look at that. ?
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 21, 2025, at 10:40?AM, rebruhnke via groups.io <rebruhnke@...> wrote:
? I have been playing with a Genmitsu CNC....? Made the rear panel of my radio using that.... so much nicer than drilling even with my drill press.? Learning curve was big even after knowing and using the 3D printer.
?
My display uses an 8bit parallel bus. I prefer that to any type of serial bus
?
Russ
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Re: boards and kits and stuff
Jack, one version of my radio (it has been in progress for 10 years!) did use the Raspberry PI for the display. I used Python and it worked quite well. Hated the? boot time so I looked at other options.? My radio, up until now, always used a DSPIC as the RX and TX processor, modeled somewhat from the SDRCube project. Another processor has always been used for the UI. I even split the audio processing up with another DSPIC. An FPGA has always been the frequency/down/up convertor.? Next iteration used an ARM (Microchip again) running at 300MHz for the UI and that worked quite well. The current iteration uses two Teensys, one for the UI and the other in place of the DSPIC.
?
Russ
|
Re: boards and kits and stuff
I have been playing with a Genmitsu CNC....? Made the rear panel of my radio using that.... so much nicer than drilling even with my drill press.? Learning curve was big even after knowing and using the 3D printer.
?
My display uses an 8bit parallel bus. I prefer that to any type of serial bus
?
Russ
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Re: LPF-Control PCB TX Logic at U3 & U7
Thanks Oliver.? I recognize this from the sketch.? I use the test code to check the LPF out and let yall' know. The filters alone are working great.
Thanks again.
Mark
KU3O
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My CW side tone is very loud, the volume setting in the CW menu does not have any affect. I am using V12 boards and running Ver 50.2.
Any ideas on what to look for?
?
Paul M.
KC2TVJ
?
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Re: LPF-Control PCB TX Logic at U3 & U7
There seems to be several failures at the LPF associated with the last software release. ? Maybe just coincidental ?
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 21, 2025, at 5:56?AM, Oliver KI3P via groups.io <oliver@...> wrote:
? The sketch that aids in testing the LPF is here:
I don't recall there being a detailed checklist to work through... the closet we have a list of all the functions of the LPF that you can test with the software:
? Serial.println("N ? - Select NO FILT band");? Serial.println("6 ? - Select 6M band"); ? Serial.println("10 ?- Select 10M band"); ? Serial.println("12 ?- Select 12M band"); ? Serial.println("15 ?- Select 15M band"); ? Serial.println("17 ?- Select 17M band"); ? Serial.println("20 ?- Select 20M band"); ? Serial.println("30 ?- Select 30M band"); ? Serial.println("40 ?- Select 40M band"); ? Serial.println("60 ?- Select 60M band"); ? Serial.println("80 ?- Select 80M band"); ? Serial.println("160 - Select 160M band"); ? Serial.println("1-4 - Select antenna 1 to 4"); ? Serial.println("XV ?- Select TXVR state"); ? Serial.println("HF ?- Select none-TXVR state"); ? Serial.println("PA ?- Toggle 100W PA state"); ? Serial.println("TXB - Toggle TX BPF state"); ? Serial.println("RXB - Toggle RX BPF state"); ? Serial.println("TX ?- Select TX state"); ? Serial.println("RX ?- Select RX state"); ? Serial.println("SWR - Read the SWR");
Is that what you were looking for?
Cheers, Oliver KI3P
On Thursday, March 20th, 2025 at 8:39 PM, epif18 via groups.io <epif18@...> wrote:
I think my LPF is acting up.? I'm using 66.4.? I built it a while ago and tested it with the LPF testing software, worked great.? But I seem to remember a detailed checklist to be used with the SW that I can't seem to find.? Am I mistaken, loosing my mind or just can't find it on github?? I need to get the hook ups right when testing the various modes.? With the nanoVNA hooked up to the filter board, filters are switched correctly but when I go through the control board I can't seem to get a good result.
Thanks
Mark
KU3O
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Re: LPF-Control PCB TX Logic at U3 & U7
The sketch that aids in testing the LPF is here:
I don't recall there being a detailed checklist to work through... the closet we have a list of all the functions of the LPF that you can test with the software:
? Serial.println("N ? - Select NO FILT band");? Serial.println("6 ? - Select 6M band"); ? Serial.println("10 ?- Select 10M band"); ? Serial.println("12 ?- Select 12M band"); ? Serial.println("15 ?- Select 15M band"); ? Serial.println("17 ?- Select 17M band"); ? Serial.println("20 ?- Select 20M band"); ? Serial.println("30 ?- Select 30M band"); ? Serial.println("40 ?- Select 40M band"); ? Serial.println("60 ?- Select 60M band"); ? Serial.println("80 ?- Select 80M band"); ? Serial.println("160 - Select 160M band"); ? Serial.println("1-4 - Select antenna 1 to 4"); ? Serial.println("XV ?- Select TXVR state"); ? Serial.println("HF ?- Select none-TXVR state"); ? Serial.println("PA ?- Toggle 100W PA state"); ? Serial.println("TXB - Toggle TX BPF state"); ? Serial.println("RXB - Toggle RX BPF state"); ? Serial.println("TX ?- Select TX state"); ? Serial.println("RX ?- Select RX state"); ? Serial.println("SWR - Read the SWR");
Is that what you were looking for?
Cheers, Oliver KI3P
On Thursday, March 20th, 2025 at 8:39 PM, epif18 via groups.io <epif18@...> wrote:
I think my LPF is acting up.? I'm using 66.4.? I built it a while ago and tested it with the LPF testing software, worked great.? But I seem to remember a detailed checklist to be used with the SW that I can't seem to find.? Am I mistaken, loosing my mind or just can't find it on github?? I need to get the hook ups right when testing the various modes.? With the nanoVNA hooked up to the filter board, filters are switched correctly but when I go through the control board I can't seem to get a good result.
Thanks
Mark
KU3O
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K9HZ
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