What is the cheapest microwave receiver for SETI?

Selection of the appropriate receiver leaves more to the discretion of the experimenter than any other portion of the amateur SETI system. Four distinct options present themsleves. In descending order of cost, they are: High-end microwave scanning receivers. read more

I'm looking for something much cheaper than the ICOM 7000, something cheaper than 100 euros. I'm interesting in building my own radiotelescope for SETI. read more

The microwave receiver takes a small, selected portion of the radio spectrum, and converts it to audio for signal analysis. Selection of the appropriate receiver leaves more to the discretion of the experimenter than any other portion of the amateur SETI system. read more

The stuff used for cable TV is cheap (pennies per meter) but pretty lossy at 1.4 GHz. The kind you buy for, say, CB radio antennas is a little better, and a bit more costly. read more