Re: Old Raspberry Pi Spectrum Analyser

by sm0vpo Wed Aug 17, 2022 2:23 pm

Has anybody actually used this analyser?

BR Harry - sm0vpo

by **admin** Fri Oct 08, 2021 9:22 pm

Admin wrote:Hi guys,
I recently had a bit of interest on Twitter for a RaPi project. Someone had an old unt and wanted to know if there was anything useful that could be built with it.

There are still a few older Raspberry PI computers floating around. I am usong one fo them for my homepages (Mk1 with 512MB memory), but I also assembled a Spectrum Analyser that covers from 24 MHz to 1866 MHz using the oldest of the two I have (256MB memory).

I had to modify the old RaPi to take a TFT LCD display module, but it went well. Just de-solder the RCA video socket to make space on the PCB component side. This connector was in the wrong place for the longer connectors in the display board. The PCB tracks are quite clumpy so anyone shold be able to solder it without any difficulty.

If anyone is interested in putting an ageing RAPi back into serveice then I have made an image of the 16GB SD card. The link is:
http://85.226.187.247/spectrum_analyser.7z

(http://85.226.187.247/2.jpg) Working analyser. Powered from 5V Power Bank

I have also put it on a second server on port 8080 (http://85.226.187.247:8080/spectrum_analyser.7z) if you have troubles downloading the first. The file is only 900MB!

It includes HD photos of the mod, assembly, and a text file of the installation, including login data and commands.

NOTE: This is old freeware SW that I downloaded many years ago, so I claim no credit whatsoever for aything here, other than building it and getting it working.

Best regards from Harry

On Monday I changed the DV-TV module for a RTL-SDR receiver.
It works perfecctly for 24.2MHz to 1700 MHz as an analyser.

I believe that the module will work for 500kHz to 24MHz but it will need to be programmed. In the RTL-SDR interfce you have to give it a command to change it to low frequency general coverage. I didn't try that.

BR Harry - SM0VPO

by **admin** Tue Sep 28, 2021 12:55 pm

Hi guys,
I recently had a bit of interest on Twitter for a RaPi project. Someone had an old unt and wanted to know if there was anything useful that could be built with it.

There are still a few older Raspberry PI computers floating around. I am usong one fo them for my homepages (Mk1 with 512MB memory), but I also assembled a Spectrum Analyser that covers from 24 MHz to 1866 MHz using the oldest of the two I have (256MB memory).

I had to modify the old RaPi to take a TFT LCD display module, but it went well. Just de-solder the RCA video socket to make space on the PCB component side. This connector was in the wrong place for the longer connectors in the display board. The PCB tracks are quite clumpy so anyone shold be able to solder it without any difficulty.

If anyone is interested in putting an ageing RAPi back into serveice then I have made an image of the 16GB SD card. The link is:
http://85.226.187.247/spectrum_analyser.7z

Old Raspberry Pi Spectrum Analyser 2

(http://85.226.187.247/2.jpg) Working analyser. Powered from 5V Power Bank

I have also put it on a second server on port 8080 (http://85.226.187.247:8080/spectrum_analyser.7z) if you have troubles downloading the first. The file is only 900MB!

It includes HD photos of the mod, assembly, and a text file of the installation, including login data and commands.

NOTE: This is old freeware SW that I downloaded many years ago, so I claim no credit whatsoever for aything here, other than building it and getting it working.

Best regards from Harry

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