This 250 watt commercial AM transmitter was designed by Warren Bruene of Collins Radio. A commercial brother of the famous 30K-1 amateur  AM transmitter, this rig features beautiful audio, the option of using audio clipping and dual 75THs modulating a 4-125 driven by an 807. The 30K-5 is a two channel transmitter with relay selectable RF components for the two frequencies that can be pre-tuned.