On Mar 3, 2025, at 1:55?PM, Donald Hellen <donhellen@...> wrote:
?There is no file storage in basic groups created after a certain date, and this is one of those groups.
Donald KX8K
On Sun, 02 Mar 2025 17:31:36 -0800, "Samuel W7STF via groups.io" <sernstfortin@...> wrote:
Just to let everyone know where I am, attached one can find a 14page document with lots of pictures and helpful supplemental information on construction, use and modification of the DSPham project by G. Whaley.
The funny thing that occured to me is that there is no Files section (at least that I am aware of) at this time in this Group.
I might have to ask the moderator about this, but for the moment, I've uploaded it to this message / topic.
Apologies. This isn't the ideal place to park it, and it's usefulness transcends any one manufacturer. If you've got an older rig, and you want to start experimenting with DSP, this is a good starting point.
More than likely, the document will be parked somewhere on GitHub, possibly with the source code. I'm asking Graham about what he thinks makes sense.
For as long as it is located in this message, I welcome any feedback which will improve the information contained within.
My intentions were to fill in some of the gaps in the very compact instructions in Graham's README.md file on GitHub.
Let me know what you think if you are so inclined.
73 W7STF, Sam
---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM ??/g/Ham-Antennas /g/HamRadioHelp ???/g/Baofeng /g/CHIRP ?https://rf-amplifiers.groups.io/g/main
Re: Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
There is no file storage in basic groups created after a certain date, and this is one of those groups.
Donald KX8K
On Sun, 02 Mar 2025 17:31:36 -0800, "Samuel W7STF via groups.io" <sernstfortin@...> wrote:
Just to let everyone know where I am, attached one can find a 14page document with lots of pictures and helpful supplemental information on construction, use and modification of the DSPham project by G. Whaley. The funny thing that occured to me is that there is no Files section (at least that I am aware of) at this time in this Group. I might have to ask the moderator about this, but for the moment, I've uploaded it to this message / topic. Apologies. This isn't the ideal place to park it, and it's usefulness transcends any one manufacturer. If you've got an older rig, and you want to start experimenting with DSP, this is a good starting point.
More than likely, the document will be parked somewhere on GitHub, possibly with the source code. I'm asking Graham about what he thinks makes sense. For as long as it is located in this message, I welcome any feedback which will improve the information contained within.
My intentions were to fill in some of the gaps in the very compact instructions in Graham's README.md file on GitHub. Let me know what you think if you are so inclined. 73 W7STF, Sam
Just to let everyone know where I am, attached one can find a 14page document with lots of pictures and helpful supplemental information on construction, use and modification of the DSPham project by G. Whaley.
The funny thing that occured to me is that there is no Files section (at least that I am aware of) at this time in this Group.
I might have to ask the moderator about this, but for the moment, I've uploaded it to this message / topic.
Apologies. This isn't the ideal place to park it, and it's usefulness transcends any one manufacturer. If you've got an older rig, and you want to start experimenting with DSP, this is a good starting point.
?
More than likely, the document will be parked somewhere on GitHub, possibly with the source code. I'm asking Graham about what he thinks makes sense.
For as long as it is located in this message, I welcome any feedback which will improve the information contained within.
?
My intentions were to fill in some of the gaps in the very compact instructions in Graham's README.md file on GitHub.
Let me know what you think if you are so inclined.
On Feb 28, 2025, at 8:01?PM, Samuel W7STF via groups.io <sernstfortin@...> wrote:
?
Russ, thus far, pretty good. So I have a TS-570DG and TS-890S that I am trying it with. (yes, I know, both have MPUs for doing signal processing and NR).
?
I find the NR, NB and Morse decode functions in the TS-890S to be very good. My ultimate desire though is to use this circuit with a Realistic DX-302 SW receiver (remember those of the 1970s?). I purchased one last year, which has none of the processing
capabilities of the 570 and 890. That was one motivator for building Graham's project.
?
Also, my desire was simply to get exposed to the practical application of this area of study.. Over 35yrs ago, I was pursuing a post-grad degree at GA Tech, and at the time, taking classes from professors well known and published in the field of Digital
Signal Processing. Unfortunately, most of the concepts and theory I learned then exists amongst mental cobwebs at this point. It's often said, what you don't use, you lose.?
?
Tom - this is DSP in the aft-end of the audio chain. Graham's project does not perform signal processing in the IF-stage, but I think you'll find this a worthwhile project.
?
It's not too dissimilar to the DSP modules made by BHI (the NEDSP boards). Years ago, I put one of those into a TS-440SAT with pretty dramatic results. I have a write up for it on the Kenwood TS-440S Groups.Io forum in the Files section and another person
posted a YouTube video on it.
Interestingly, while the results were very good with the BHI module, there were many artifacts (like sounding under-water) in that implementation when going to the highest setting of NR, that I do not hear with the Teensy. The Teensy implementation is
also much less expensive!?
?
FWIW: In the files section of the TS-570 Group.Io, I placed a write-up for installing an IF tap for SDR Waterfall Display in my TS-570DG. I like to experiment, and Kenwood makes great products. So blending new and older technology is a great aspect of
our hobby.
I'm assembling a few photos now and will post them here in the file section tomorrow (Saturday) which covers initial prototyping of the circuit and specifics to assembly which may be of help others. I think I'll post my notes as well. Then I'll go the
next step to revise those notes, and provide information regarding the software and installing the necessary elements on a PC.
?
Graham's README.md file covers a lot that should be read first, but I did need his help so I think I can distill some of it to help people get over the "activation energy" needed to purchase the parts and give it a go if interested.
73 W7STF S.
?
?
?
Re: Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
Russ, thus far, pretty good. So I have a TS-570DG and TS-890S that I am trying it with. (yes, I know, both have MPUs for doing signal processing and NR).
?
I find the NR, NB and Morse decode functions in the TS-890S to be very good. My ultimate desire though is to use this circuit with a Realistic DX-302 SW receiver (remember those of the 1970s?). I purchased one last year, which has none of the processing capabilities of the 570 and 890. That was one motivator for building Graham's project.
?
Also, my desire was simply to get exposed to the practical application of this area of study.. Over 35yrs ago, I was pursuing a post-grad degree at GA Tech, and at the time, taking classes from professors well known and published in the field of Digital Signal Processing. Unfortunately, most of the concepts and theory I learned then exists amongst mental cobwebs at this point. It's often said, what you don't use, you lose.?
?
Tom - this is DSP in the aft-end of the audio chain. Graham's project does not perform signal processing in the IF-stage, but I think you'll find this a worthwhile project.
?
It's not too dissimilar to the DSP modules made by BHI (the NEDSP boards). Years ago, I put one of those into a TS-440SAT with pretty dramatic results. I have a write up for it on the Kenwood TS-440S Groups.Io forum in the Files section and another person posted a YouTube video on it.
Interestingly, while the results were very good with the BHI module, there were many artifacts (like sounding under-water) in that implementation when going to the highest setting of NR, that I do not hear with the Teensy. The Teensy implementation is also much less expensive!?
?
FWIW: In the files section of the TS-570 Group.Io, I placed a write-up for installing an IF tap for SDR Waterfall Display in my TS-570DG. I like to experiment, and Kenwood makes great products. So blending new and older technology is a great aspect of our hobby.
I'm assembling a few photos now and will post them here in the file section tomorrow (Saturday) which covers initial prototyping of the circuit and specifics to assembly which may be of help others. I think I'll post my notes as well. Then I'll go the next step to revise those notes, and provide information regarding the software and installing the necessary elements on a PC.
?
Graham's README.md file covers a lot that should be read first, but I did need his help so I think I can distill some of it to help people get over the "activation energy" needed to purchase the parts and give it a go if interested.
73 W7STF S.
?
?
?
Re: Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
I have 3 radios that could benefit from such a thing: a 520, an 830, and an FT 101b. I have only basic experience with an arduino. ?A project like this would certainly be of interest!
73,
Tom ai4th
Re: Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
The hardest aspect of the project for me was my lack of recent experience with the Arduino development environment. I received some handholding from Graham.
However, now I could support others, like he supported me if they wanted to build the software that is to be uploaded to the Teensy.
Another aspect of the learning curve for me was examining the source, and documenting how to use the menu system of the project.
So, I've been putting some additional documentation together and sharing with Graham that may get merged with Graham's documentation, or stand on it's own and be provided as supplemental notes.
?
It is possible (I can ask Graham about this) to provide the resultant file of the build process so others wouldn't necessarily have to worry about installing the Arduino IDE and libraries.
Of course then, you'd rob yourself of the ability to modify the source code.
But I think I can provide step-by-step instructions for installing the necessary libraries and downloading the source, and getting the system setup so one can do builds and perhaps their own modifications.
?
The wiring is much simpler IMHO than building many other kits. Everything is rather modularized in Arduino, and the connections to the LCD, and Rotary Encoder from the Teensy and it's Audio Board is pretty simple.
While it's most easy to use a solderless breadboard and Dupont Jumpers to initially get things working, you wouldn't need a breadboard, you can do point-to-point wiring using a soldering iron without much effort.
?
In a day or two, I will upload a few pictures of the breadboard implementation I have.
Sam
Re: Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
On Thu, Feb 27, 2025 at 11:57?AM Samuel W7STF via <sernstfortin=[email protected]> wrote:
I'm experimenting with this technology.
I am attempting to assess if anyone would be interested in my experience constructing an Arduino-based DSP Noise Reduction implementation by Graham Whaley.
One can read about his wonderful DSPHam device here:
?
It's quite feature packed and provides the user with:
Several digital filters with differing bandwidth for FM, AM, SSB, CW which can be customized
Two different AGC algorithms
Noise Blanker and Notch Filter
Selectable Noise Reduction Algorithms: Least Mean Squared (LMS), Spectral Subtraction, Two types of Moving Average, and Leaky LMS
Three algorithms for decoding CW
Approximate parts summary and cost:
$36 Teensy 4.1 ARM Cortex-M7 Processor
$15 Teensy 4.0/4.1 Audio Adpater Shield
$ 4? Two-Line x 16 character backlit LCD (I originally used an RGB LCD, but then modified the code to use a cheaper mono-chromatic LCD)
$ 2? Rotary Encoder
Some additional miscellaneous parts, for 5V power-supply, wire, filter, mono-audio plugs, etc.
?
Note: I have not put it in an enclosure yet. But one can see from the list above, adding DSP capability to an older radio can be done for a very reasonable amount.
?
Please let me know if you are interested.
73 W7STF Sam
?
Any Interest in adding Digital Signal Processing Noise Reduction to an older Kenwood Transceiver?
I am attempting to assess if anyone would be interested in my experience constructing an Arduino-based DSP Noise Reduction implementation by Graham Whaley.
One can read about his wonderful DSPHam device here:
?
It's quite feature packed and provides the user with:
Several digital filters with differing bandwidth for FM, AM, SSB, CW which can be customized
Two different AGC algorithms
Noise Blanker and Notch Filter
Selectable Noise Reduction Algorithms: Least Mean Squared (LMS), Spectral Subtraction, Two types of Moving Average, and Leaky LMS
Three algorithms for decoding CW
Approximate parts summary and cost:
$36 Teensy 4.1 ARM Cortex-M7 Processor
$15 Teensy 4.0/4.1 Audio Adpater Shield
$ 4? Two-Line x 16 character backlit LCD (I originally used an RGB LCD, but then modified the code to use a cheaper mono-chromatic LCD)
$ 2? Rotary Encoder
Some additional miscellaneous parts, for 5V power-supply, wire, filter, mono-audio plugs, etc.
?
Note: I have not put it in an enclosure yet. But one can see from the list above, adding DSP capability to an older radio can be done for a very reasonable amount.
Picked up a used TS570SG recently.? It is a nice radio overall.? However, the SWR circuit doesn't seem to be working correctly.? It never shows higher than a 1.5 SWR, even with no load connected.? And it doesn't agree with an external meter I? have.? Consequently the SWR/Power foldback circuit never really gets activated. I tried a full reset on it and it still does the same thing.
Maybe out of context of this group but I'm looking for some
intelligent answers.
Anyone know of a "good" whip for HT use? ?Dual band would
be nice, but better yet a triband better. ?I' tried a few
models from Diamond, Comet and some "white box" ones from
China. However the return loss is poor to unusable in the area
of 8 ~ 0 db respectively. I have more results on the web site,
but don't wanna bore the readers.?
--
-
Regards, Karl Shoemaker
To contact me, please visit SRG's web site at?
for the current email address.
On 2/20/2025 2:19 PM, Jim Barbour via groups.io wrote:
Why not stick with what came with the radio? Every Kenwood I've had worked great with the original antenna. I still use the original on the G71 I have. The F6 I had to replace because I caught it in a door...I did change that one out for the Vertex quadband antenna which gave me some 6M rx capability-plus it was much cheaper. But that's been working great too. I don't think much of the ham grade aftermarket antennas, especially the big long ones. They catch on things, break easy, and don't work enough better to justify spending the money on them.
On 2/20/2025 2:31 PM, Lou WA5LOU via groups.io wrote:
Have you tried any of the antenna groups?
Lou WA5LOU
On Thu, Feb 20, 2025 at 2:26?PM K7SRG via groups.io <> <srg734@... <mailto:[email protected]>> wrote:
??? Maybe out of context of this group but I'm looking for some ??? intelligent answers. ??? Anyone know of a "good" whip for HT use?? Dual band would be nice, ??? but better yet a triband better.? I' tried a few models from ??? Diamond, Comet and some "white box" ones from China. However the ??? return loss is poor to unusable in the area of 8 ~ 0 db ??? respectively. I have more results on the web site, but don't wanna ??? bore the readers. ??? -- ??? - ??? Regards, Karl Shoemaker ??? To contact me, please visit SRG's web site at ??? <> ??? for the current email address.
Why not stick with what came with the radio? Every Kenwood I've had worked great with the original antenna. I still use the original on the G71 I have. The F6 I had to replace because I caught it in a door...I did change that one out for the Vertex quadband antenna which gave me some 6M rx capability-plus it was much cheaper. But that's been working great too. I don't think much of the ham grade aftermarket antennas, especially the big long ones. They catch on things, break easy, and don't work enough better to justify spending the money on them.
On 2/20/2025 2:31 PM, Lou WA5LOU via groups.io wrote:
Have you tried any of the antenna groups? Lou WA5LOU On Thu, Feb 20, 2025 at 2:26?PM K7SRG via groups.io <> <srg734@... <mailto:[email protected]>> wrote: Maybe out of context of this group but I'm looking for some intelligent answers. Anyone know of a "good" whip for HT use?? Dual band would be nice, but better yet a triband better.? I' tried a few models from Diamond, Comet and some "white box" ones from China. However the return loss is poor to unusable in the area of 8 ~ 0 db respectively. I have more results on the web site, but don't wanna bore the readers. -- - Regards, Karl Shoemaker To contact me, please visit SRG's web site at <> for the current email address.
On Thu, Feb 20, 2025 at 2:26?PM K7SRG via <srg734=[email protected]> wrote:
Maybe out of context of this group but I'm looking for some intelligent answers.
Anyone know of a "good" whip for HT use?? Dual band would be nice, but better yet a triband better.? I' tried a few models from Diamond, Comet and some "white box" ones from China. However the return loss is poor to unusable in the area of 8 ~ 0 db respectively. I have more results on the web site, but don't wanna bore the readers.?
--
- Regards, Karl Shoemaker To contact me, please visit SRG's web site at? for the current email address.
Tom ai4th
Frank Swindler Jr.
K7SRG
Charlie Fellenbaum - WB4FAW
Lou WA5LOU