¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io
  1. SoftwareControlledHamRadio
  2. Messages
Expanded Topics Messages Polls
Date
Re: Success

 

¿ªÔÆÌåÓý

Tim¡­ is your display running on 3.3V or 5V?

?

?

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 Tim via groups.io
Sent: Friday, February 14, 2025 9:27 AM
To: [email protected]
Subject: [SoftwareControlledHamRadio] Success

?

I was having terrible issues with code randomly shutting down ie freezing.

I had some ribbon cable ferrites that were split and I installed them on display and front panel ribbon cables.

No more issues! It has been running (50.2) for several days continuous without a hickup.

I do notice that upper side band work fine, lower side band I need to tune 250hz high.

I believe the ferrites saved the day, you can find slip on ones that are much smaller on sleezebay a bit to wide but not s bulky as the clamp on ones.

I only have BPF for 20 and 80, need to finish rest of BPF's and start on LPF's.

At least I know it is not an issue with hardware or SW, it was driving me crazy trying to figure out freezing problems.

Tim W4YN
Re: Software for Chapter 9 AT with Graphical SWR Analyzer

 

Hi Jack
?
I am not sure its the correct file as it seems to relate to your earlier Antenna Analyzer project and not your more recent MicroController Projects Chapter 9 "100 Watt Antenna Tuner"
?
The file AT.h appears to be different to the .h file as described on Page 9-23 of the book as there is no declaration of struct grafix.
?
The Menu options shown on page 9.22 of the book are
"Full",Band, Freq, Oper, Cal
i.e 5 menu options
but
in the .ino file there is the line
const char *menuOptions[] ? ? ? = {" Full ?", " ?Bands ?", " ?Freq ?", " ?Cal "};
?
i.e. Only 4 Menu Options - No Oper menu option.
?
Is it possible there has been a "mix up" with files for the Antenna Analyzer project and the files for the more recent 100 Watt Antenna Tuner?
?
73
?
Dave
GM4NFI
?
?
?
?
Re: Ch 8 Programmable Bench Power Supply

 

While I've slept since that book was written, I believe there is no L3 now. That was removed at some point during the editing of the book and we didn't bother renumbering the parts. As to L1, L2, and L4 specs, these are for RFI suppression. As such, they aren't really "cores", but rather small beads that slip onto a wire, usually between circuit stages. See eBay #184715885509 for example.

Jack, W8TEE

On Friday, February 14, 2025 at 02:17:38 PM EST, Kathy Downing <kl_downing@...> wrote:


Hi,

I am looking at the ch8 programmable bench power supply schematic (p8-35) and BOM for same.

My question:
L1,2, 4 are shown on schematic. Is there an L3?

In the BOM L1,2,4 are listed as "ferrite core". What are the specs??

Thanks,
Larry

--
Jack, W8TEE
Ch 8 Programmable Bench Power Supply

 

Hi,

I am looking at the ch8 programmable bench power supply schematic (p8-35) and BOM for same.

My question:
L1,2, 4 are shown on schematic. Is there an L3?

In the BOM L1,2,4 are listed as "ferrite core". What are the specs??

Thanks,
Larry

Success

 

I was having terrible issues with code randomly shutting down ie freezing.
I had some ribbon cable ferrites that were split and I installed them on display and front panel ribbon cables.
No more issues! It has been running (50.2) for several days continuous without a hickup.
I do notice that upper side band work fine, lower side band I need to tune 250hz high.
I believe the ferrites saved the day, you can find slip on ones that are much smaller on sleezebay a bit to wide but not s bulky as the clamp on ones.
I only have BPF for 20 and 80, need to finish rest of BPF's and start on LPF's.
At least I know it is not an issue with hardware or SW, it was driving me crazy trying to figure out freezing problems.
Tim W4YN
Re: Software for Chapter 9 AT with Graphical SWR Analyzer

 

Try it again. I just uploaded the file again.

Jack, W8TEE

On Friday, February 14, 2025 at 09:57:52 AM EST, David Leckie via groups.io <djcleckie@...> wrote:


Hi
?
Having the same issue as I can't find the source code? for Chapter 9 100W Antenna Tuner with Graphical SWR Analyzer.
?
There is the folder?
?
But this folder is empty.
?
Elsewhere there is a folder Chapter09AntennaAnalyzer.
But as the name states its the code for the Antenna Analyzer Project.
?
?
73
?
Dave
GM4NFI
?
?

--
Jack, W8TEE
Re: Software for Chapter 9 AT with Graphical SWR Analyzer

 

Hi
?
Having the same issue as I can't find the source code? for Chapter 9 100W Antenna Tuner with Graphical SWR Analyzer.
?
There is the folder?
?
But this folder is empty.
?
Elsewhere there is a folder Chapter09AntennaAnalyzer.
But as the name states its the code for the Antenna Analyzer Project.
?
?
73
?
Dave
GM4NFI
?
?
Re: V12 compiling error

 

Yeah as I recall, the max output from the PCM5102 is something like 1-2V
max... works ok for headphones but not quite there for a speaker.


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: Wednesday, February 12, 2025 7:11 PM
To: [email protected]
Cc: Tim via groups.io <w4yn@...>
Subject: Re: [SoftwareControlledHamRadio] V12 compiling error

You should get audio well before max volume.

I had my V12 Main Board and RF board working with my V11 LPF. It worked
fine, and I made QSOs with it.

- Jerry, KF6VB


On 2025-02-12 17:07, Tim via groups.io wrote:
Bill
I got some BPF in place and I indeed have audio in headphones, volume
at max.
Slow pulsing I had is gone.
So the RX path is working FB.
I still get some random freeze ups but at least all is working.
With out BPF there may have been some overload.
Tim W4YN


Links:
------
[1] /g/SoftwareControlledHamRadio/message/32741
[2] /mt/111092895/243852
[3] /g/SoftwareControlledHamRadio/post
[4] /g/SoftwareControlledHamRadio/editsub/243852
[5]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1
943518115/xyzzy
Re: V12 compiling error

 

¿ªÔÆÌåÓý

Yeah that overload is a problem for a lot of SDRs because the front ends are wide open so even a loud AM station by your house could overload the front end and mixing circuits making you think there is something wrong with the receiver.? The BPF of course, only lets in signals from the band you are on¡­ so as long as you don¡¯t have a neighbor ham on the same band overwhelming your receiver¡­ it works fantastic!? Only the really good SD receivers and transceivers use a good BPF like this one.? Of course it¡¯s good for cleaning up spikes in transmit spectrum too.

?

?

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 Tim via groups.io
Sent: Wednesday, February 12, 2025 7:07 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] V12 compiling error

?

Bill?

I got some BPF in place and I indeed have audio in headphones, volume at max.?

Slow pulsing I had is gone.?

So the RX path is working FB.

I still get some random freeze ups but at least all is working.

With out BPF there may have been some overload.

Tim W4YN
Re: V12 compiling error

 

You should get audio well before max volume.

I had my V12 Main Board and RF board working with my V11 LPF. It
worked fine, and I made QSOs with it.

- Jerry, KF6VB

On 2025-02-12 17:07, Tim via groups.io wrote:
Bill
I got some BPF in place and I indeed have audio in headphones, volume
at max.
Slow pulsing I had is gone.
So the RX path is working FB.
I still get some random freeze ups but at least all is working.
With out BPF there may have been some overload.
Tim W4YN
Links:
------
[1] /g/SoftwareControlledHamRadio/message/32741
[2] /mt/111092895/243852
[3] /g/SoftwareControlledHamRadio/post
[4] /g/SoftwareControlledHamRadio/editsub/243852
[5]
/g/SoftwareControlledHamRadio/leave/10484476/243852/1943518115/xyzzy
Re: V12 compiling error

 

Bill?
I got some BPF in place and I indeed have audio in headphones, volume at max.?
Slow pulsing I had is gone.?
So the RX path is working FB.
I still get some random freeze ups but at least all is working.
With out BPF there may have been some overload.
Tim W4YN
Re: Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

 

¿ªÔÆÌåÓý

Oh yeah¡­ now I remember¡­ it¡¯s the reason I have a large building full of Standard AM/FM broadcast transmitters.

?

?

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 Dave Mueller AA3EE via groups.io
Sent: Wednesday, February 12, 2025 3:02 PM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

?

ATSC uses 8VSB modulation.

?
Re: Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

 

ATSC uses 8VSB modulation.
?
Re: Excessive Noise

 

Hey yall'
I think I found a player in the noise problem (maybe one of several!).? I had a very marginal power return connection that I corrected, not sure how this thing even worked with this problem.? Noise problem better but I have this pulsating audio problem that varies by band.? I'm running V12, Ver50.2, Debug off, TXCO, 528MHz, Faster with LTO.? 20M is the worst. I get the same problem going thru an audio amp or directly to MAIN with headphones.? I've tried different Teensy frequencies and all the LTO options to no avail.? I've looked thru the pulsating audio thread but they seemed to apply to older SW versions, maybe even V11 HW.
Thoughts?
Thanks
Mark
KU3O
Re: Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

 

¿ªÔÆÌåÓý

Must have been an FM system?? That process would not work very well for SSB¡­

?

?

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 Dave Mueller AA3EE via groups.io
Sent: Wednesday, February 12, 2025 10:03 AM
To: [email protected]
Subject: Re: [SoftwareControlledHamRadio] Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

?

The system I worked on (ATSC) wasn't real time/continuous. The system took a snapshot of the RF, calculated then applied the corrections, then stopped. It could be set to run every X minutes, but typically after everything reached operating temperatures, there was little improvement. It used two samples, one before and one after the final PA system. Linear correction was for gain variations and group delay caused by the extremely sharp filter edges, non-linear was for distortion.

A third party modulator we used for DVB had the corrections done manually by dragging points around on a graph via a laptop then sending the data to the modulator. Not as fun as pushing a button when you're working on a rooftop!
Re: Testing Band Pass Filter Board

 

¿ªÔÆÌåÓý

That test software just tests to determine if the hardware is there and functioning¡­ not for receiving and transmitting signals¡­

?

?

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 Tim via groups.io
Sent: Wednesday, February 12, 2025 9:07 AM
To: [email protected]
Subject: [SoftwareControlledHamRadio] Testing Band Pass Filter Board

?

I see the sketch for testing board.

I assume you load this into Teensy and plug BPF board into Boards Header??

Not sure how I tell Teensy which band to activate.

I am thinking? alternate maybe just use regular STD and select band might accomplish same thing?

Tim?
Re: Rob Sherwood Presentation Slides on Amateur Radio Transceiver Performance

 

The system I worked on (ATSC) wasn't real time/continuous. The system took a snapshot of the RF, calculated then applied the corrections, then stopped. It could be set to run every X minutes, but typically after everything reached operating temperatures, there was little improvement. It used two samples, one before and one after the final PA system. Linear correction was for gain variations and group delay caused by the extremely sharp filter edges, non-linear was for distortion.
A third party modulator we used for DVB had the corrections done manually by dragging points around on a graph via a laptop then sending the data to the modulator. Not as fun as pushing a button when you're working on a rooftop!
Testing Band Pass Filter Board

 

I see the sketch for testing board.
I assume you load this into Teensy and plug BPF board into Boards Header??
Not sure how I tell Teensy which band to activate.
I am thinking? alternate maybe just use regular STD and select band might accomplish same thing?
Tim?
Right-Left Rule Examples:

 

I presented the Right-Left Rule in the C Programming Guide book (1982) and there have been lots of examples written since then. This is a list of example you might use to test your understanding of the Rule, including some illegal data definitions:

Here are some legal and illegal examples:
Jack, W8TEE
int i; // an int
int *p; // an int pointer (ptr to an int)
int a[]; // an array of ints
int f(); // a function returning an int
int **pp; // a pointer to an int pointer (ptr to a ptr to an int)
int (*pa)[]; // a pointer to an array of ints
int (*pf)(); // a pointer to a function returning an int
int *ap[]; // an array of int pointers (array of ptrs to ints)
int aa[][]; // an array of arrays of ints
int af[](); // an array of functions returning an int (ILLEGAL)
int *fp(); // a function returning an int pointer
int fa()[]; // a function returning an array of ints (ILLEGAL)
int ff()(); // a function returning a function returning an int (ILLEGAL)
int ***ppp; // a pointer to a pointer to an int pointer
int (**ppa)[]; // a pointer to a pointer to an array of ints
int (**ppf)(); // a pointer to a pointer to a function returning an int
int *(*pap)[]; // a pointer to an array of int pointers
int (*paa)[][]; // a pointer to an array of arrays of ints
int (*paf)[](); // a pointer to a an array of functions returning an int (ILLEGAL)
int *(*pfp)(); // a pointer to a function returning an int pointer
int (*pfa)()[]; // a pointer to a function returning an array of ints (ILLEGAL)
int (*pff)()(); // a pointer to a function returning a function returning an int (ILLEGAL)
int **app[]; // an array of pointers to int pointers
int (*apa[])[]; // an array of pointers to arrays of ints
int (*apf[])(); // an array of pointers to functions returning an int
int *aap[][]; // an array of arrays of int pointers
int aaa[][][]; // an array of arrays of arrays of ints
int aaf[][](); // an array of arrays of functions returning an int (ILLEGAL)
int *afp[](); // an array of functions returning int pointers (ILLEGAL)
int afa[]()[]; // an array of functions returning an array of ints (ILLEGAL)
int aff[]()(); // an array of functions returning functions returning an int (ILLEGAL)
int **fpp(); // a function returning a pointer to an int pointer
int (*fpa())[]; // a function returning a pointer to an array of ints
int (*fpf())(); // a function returning a pointer to a function returning an int
int *fap()[]; // a function returning an array of int pointers (ILLEGAL)
int faa()[][]; // a function returning an array of arrays of ints (ILLEGAL)
int faf()[](); // a function returning an array of functions returning an int (ILLEGAL)
int *ffp()(); // a function returning a function returning an int pointer (ILLEGAL)



--
Jack, W8TEE
Re: V12 compiling error

 

On 2025-02-11 10:01, K9HZ wrote:
No problem¡­ if you have amplified speakers or a stereo amp
(audiophile or music)¡­ I encourage you to use it.
*** This reminds me of a project I've got on the back-burner. I got an
amp that should be relatively decent. And a Boston Acoustics speaker
mounted on the wall.

Four HF rigs on the desk. I switch the antenna with a manual switch.

I'd like to build a gadget to switch both the antenna and the speaker & amp
to the desired HF rig. I've got a little card for switching antennas - with
four beefy relays. Bought it from an Eastern European vendor on Ebay.

- Jerry, KF6VB
1281 - 1300 of 33881