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Re: LPF-Control PCB TX Logic at U3 & U7

 

¿ªÔÆÌåÓý

Yeah me either¡­ I have not spent more than 2 days in a row in our house in the last month due to conferences, ?vacation travels, contests, family events, etc.? Hope this settles down before Hamvention.

?

?

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 Oliver KI3P via groups.io
Sent: Saturday, March 22, 2025 10:05 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] LPF-Control PCB TX Logic at U3 & U7

?

My radio is still offline as I rebuild it after the burning smell. Still waiting on a replacement Teensy to be delivered. So I'm not much help at the moment.
Re: LPF-Control PCB TX Logic at U3 & U7

 

Bill: my new radio layout is prone to the display freezes, so I'd be happy to test one of your display buffers (5V) if you have any available for testing.
Re: LPF-Control PCB TX Logic at U3 & U7

 

My radio is still offline as I rebuild it after the burning smell. Still waiting on a replacement Teensy to be delivered. So I'm not much help at the moment.
Re: LPF-Control PCB TX Logic at U3 & U7

 

¿ªÔÆÌåÓý

And this works perfectly on your radio¡­ correct Oliver?


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@...

?


On Mar 22, 2025, at 5:20?AM, Oliver KI3P via groups.io <oliver@...> wrote:

?
The code that controls the LPF is here:
?
Can you try out version 66.9 of the code and see whether the problem persists? This is the fully-featured version that is in beta testing.
Re: CW Side tone

 

Jerry,
?
Yeah, That fixed it.
?
Thanks,
Paul M. KC2TVJ
Re: LPF-Control PCB TX Logic at U3 & U7

 

¿ªÔÆÌåÓý

I won¡¯t be able to test till Monday?
dave

On Mar 22, 2025, at 6:20?AM, Oliver KI3P via groups.io <oliver@...> wrote:

?
The code that controls the LPF is here:
?
Can you try out version 66.9 of the code and see whether the problem persists? This is the fully-featured version that is in beta testing.
Re: LPF-Control PCB TX Logic at U3 & U7

 

The code that controls the LPF is here:
?
Can you try out version 66.9 of the code and see whether the problem persists? This is the fully-featured version that is in beta testing.
Re: LPF-Control PCB TX Logic at U3 & U7

 

¿ªÔÆÌåÓý

Well¡­. What I can tell you¡­ working backwards towards the code, ?TX_BPF_SEL and RX_BPF_SEL, or GPA0 and GPA1 for U15 which is I2C address Hex 0x25 on WIRE2.? ?GPA0: HI = BPF In Circuit During TX, LO = Bypass. And GPA1: HI = BPF In Circuit During RX, LO = Bypass.?

?

Now in the code (which I do not know but Al and Oliver do), Somewhere in the code is in this (I can¡¯t focus tonight but will do it tomorrow):

?

#define LPF_BOARD_MCP23017_ADDR 0x25

#define TXSTATE 1

#define RXSTATE 0

#define TXRX_PIN 22

?

// GPIO2 is mapped to TX pin:

// HIGH means TX mode

// LOW means RX mode

pinMode(TXRX_PIN, OUTPUT);

TXRX_state = RXSTATE;

digitalWrite(TXRX_PIN, TXRX_state); ?// RX mode

?

if (selection == "TXB"){

? ? Serial.println("Toggling TX BPF selection");

? ? ? GPA_state = GPA_state ^ 0b00000001;

? } if (selection == "RXB"){

? ? Serial.println("Toggling RX BPF selection");

? ? ? GPA_state = GPA_state ^ 0b00000010;

? }

? if (selection == "TX"){

? ? Serial.println("Selecting TX state");

? ? TXRX_state = TXSTATE;

? ? digitalWrite(TXRX_PIN, TXRX_state); ?// TX mode

? }

? if (selection == "RX"){

? ? Serial.println("Selecting RX state");

? ? TXRX_state = RXSTATE;

? ? digitalWrite(TXRX_PIN, TXRX_state); ?// RX mode

?

?

?

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 epif18 via groups.io
Sent: Friday, March 21, 2025 8:43 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] 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
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
Re: Tiny Ten Transceiver

 

¿ªÔÆÌåÓý

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@...

?

?

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
Re: 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
Re: CW Side tone

 

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@...

-----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
Re: Tiny Ten Transceiver

 

¿ªÔÆÌåÓý

¡°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@...

?

?

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.

?

73, Bob? W7PUA
Re: Tx-Rx logic on LPF-Control

 

¿ªÔÆÌåÓý

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@...

?

?

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?

dave, n3ds
Re: 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
Re: CW Side tone

 

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@...

-----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
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
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
Re: 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.
?
73, Bob? W7PUA
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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