[RFI] My Station RFI Sources

Kris Mraz, N5KM Kris Mraz, N5KM" <mraz@aud.alcatel.com
Thu, 08 Jan 1998 14:36:16 -0600

Now that the upper HF bands are getting active I've discovered a 
myriad of noise sources within my own shack. I'll be attacking
these and will report successes and failures. Here's the current

PC: Various birdies leaking from all cables. Strong broadband hash 
that, I believe, is coming from the switching power supply. This hash
is not affected by unplugging all cables from the PC.

Monitor: birdies from horizontal scanning rate.

HDR-300 rotator: Broadband hash. This also interferes with my TV
channel 5! (TV antenna is outside on mast at least 30 ft. away).

Packet: TNC (MFJ 1278) generates low level broadband hash. I haven't
tried removing cables to see where its leaking yet.

To work the weak ones on 10 and 15m I have to turn everything off.
This is not fun, as you can imagine. Can anyone suggest a starting 
point for the switching power supply problem?

Kris N5KM 

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