http://www.ebay.de/itm/Primo-EM4052PMI4-Precision-Condenser-Microphone-/390603511389 Granted they are not ribon mic's or anything exotic but they are 10X better than anything sold specifically for a Ham radio or CB radio! You can name your own price for them and roll your own interface. It only needs 4V so most units that feed 6-10 volts to a Universal 8 pin will feed this bad boy just fine. You could do audio IC or a tube pre and do impedance matching, modeling. eq, compression easy enough. In fact you could use all off the shelf stuff and toss it in a project box even. The freq response is so flat a pine wood derby car would not roll down the graph! Seems perfect to feed a hifi type of setup. Do keep in mind that as you feed it more power gain goes up so the chart with it will be different at say 9V as compared to 4V. I doubt you will ever get a capsule this nice this cheaply. LOL Maybe I will hang one from my rear view mirror and convert my dead pedal into a ptt pedal! LOL It will just hang like a lipstick mic in front of a church choir! LOL Technicaly these are not RF microphones just the elements/capsule and not specific to RF or broadcasting. So I was not sure where to put them. So I thought homebrewing covered it better since you have to do some work to make them into a finished product for rf use.