Topband: Vicious noise - found

[Brian Moran]

I'm feeling a little sheepish about this -- the noise turned out to be a brand-new, recently installed USB to Serial converter, hooked to a rig no less (not THE rig though!). Perhaps there's a DC-DC converter in it from which to get the handshaking +/-V.
   
  The closer antennas didn't hear it as well as a beverage, but the major clue was that I was able to hear it on the dummy load, too.
   
  Thanks for everyone's suggestions, 
  Brian N9ADG