I have purchased several of the cheap solid state CB amplifiers.? These things will work anywhere from approximately 100KHz to 30+ MHz.? They are broad as a barn.? However, if you are going to use them on the HAM bands, you really should use a band pass filter.? Not using one will almost guarantee you will be transmitting on many bands at once!? I have modified several of these amps by installing a low pass filter board from a parts radios.? Most of the LPF's I have bought off EBAY will work, although some circuitry will need to be done to change the band of operation.? A simple switch on the front will work.? Maybe some simple frequency determination device would be able to automatically change the band?? I'll have to look into this down the road.? Radio control is pretty easy to do for ICOM radio's.? I am going to do this for my FT-817, once I get it working although that kind of gets away from QRP operation!
73, Clint, VE3CMQ
