[Hallicrafters] computer noise

[Joe and Ann Vlk]

Lots of comments on fluorescent replacement bulb generated hash.  I recently purchased several 4 packs and 6 packs from Home Depot, installed them thoughout the house (including the radio shack) and have not experienced any hash from them.  

There were also side comments on computer/monitor generated noise.  When I purchased my latest 64 bit processor super computer, it put signals all over the bands.  I made a simple "sniffer" coil pick up and plugged it into my 756pro antenna socket and went sniffing.  I determined what every was generating the noise in the computer (most likely the switching power supply) it was being conducted through the computers power cord.  Various clamp on power cord ferrites didn't seem to suppression the noise at all.  I found a build project in my 1980 ARRL Handbook (that's right, 1980) for a brute force filter.  I built one in a Radio Shack plastic project box and wired it in series with the computers power cord.  All the computer generated noise is now completely gone.  Glad I didn't trash that old handbook, maybe I should buy a new one?