HFU HF Underground

Technical Topics => Equipment => Topic started by: ThaDood on January 25, 2025, 1857 UTC

Title: Another look at the Radio Shack DSP-40 NR / Audio Amp, and maybe improvements.
Post by: ThaDood on January 25, 2025, 1857 UTC

http://www.gbppr.net/scanner/dsp40/index.html   I bought one of these at a hamfest, in the late 1990's, for $5.00. I couldn't turn that down, since the components themselves are at least worth that. As with everyone else who has tried one, the results are not that impressive, but my take is that it's great for taking out HET's when someone tunes-up on the FREQ that you want to QSO on. Anyway, after sitting in a bin for like 20-some years, it was time to take yet another look at this unit, and see if there were any modifications to be done with it. Apparently so... I'm going to try these.

Title: Re: Another look at the Radio Shack DSP-40 NR / Audio Amp, and maybe improvements.
Post by: Robot Matrix on January 27, 2025, 0809 UTC

I miss the old Radio Shack before they went all CE, cellphones, and later bankrupt. I don't think it was all their fault.  I think people got dumber, and as a result, RS became more irrelevant. I'm currently building an antenna that they used to sell, which you can't find anymore, even on ebay.