[Elecraft] Horrible signal on 10130

[Jim Brown]

Most "horrible wide signals" observed on the P3 are produced by 
electronic sources like switching power supplies (including battery 
chargers) and the clocks associated with various digital devices. Some 
may be in your own home, others in the homes of neighbors. They 
typically show up as a typical bell-shaped curve peaking at some 
frequency, and other similar peaks spaced anywhere from 10 kHz to 50 kHz 
apart.  The 33V DC power supply that SteppIR sold me for their 
controller is REAL NASTY, especially on the higher HF bands.  I had to 
replace it with a home brew linear supply so that I could work on those 
bands.

73, Jim K9YC