I have a couple of GE Delta 110w trunk mount radios that are in working condition. I was wondering how hard it would be to extract the PA board from the radio and use it as an FM amplifier. Although I am unable to find any hard information on the exciter drive current, I am guessing that it is somewhere between 25 and 350ma And there is a separate keying voltage that is applied to turn the transmitter. It is somewhere in the range of 8 or 10 volts but I don't remember which. I can get it wired up to try, but I don't have anything with a low enough output to drive it. Is there any way that I could attenuate the input drive enough to be able to drive this from an HT or a 10w mobile radio without an attenuator inline? Or a decent schematic for a fixed attenuator to tie onto the input would be good also.