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Hi All !
I built a Softrock Combined Lite II Receiver with a fixed IF of 460.800 KHz.
First of all it was totaly unusable because i have a 20 KW AM Transmitter five miles away from my qth.
It is the transmitter of "MDR Info" at 1044 KHz located near Dresden.
So i choosed to built a 500 KHz lowpass filter from this desgin:
http://www.k5td.com/K5TD/500kHz_Low_Pass_Filter.html
The spurious and second-order intermodulation products are gone and now it seems that i have a new problem.
I receive a fence of signals, which look like packet transmissions all over the spectrum.
Is this a powerline modem ?
I switched all powered, and network devices of in the house. Antenna is a vertical outside.
Any hints ?
73 Oliver DL6KBG JO61UB