Tom wrote:

In my experience with the DE1103, there is a lot of stuff above 20MHz
all the time - it's crud generated internally due to intermodulation
distortion among strong signals at lower and higher frequencies.


Crud?...I used to get a lot of that between 26.965-27.405 MHz. In fact,
that is all I got. Seems to have quietened down a lot in the last
decade. It must have something to do with the eleven year 'Dumb Spot" cycle.






mike