How to Build a Wireless Microphone

In those days there were only bands that were totally legal, who was a 37 megahertz citizens band. And at different frequencies, propagation and RF pickup is different frequencies. So we had to use another frequency. The other thing was like the metal thing on the guitar or on the end of the microphone. It looked like it was a snap on transmitter that we used for the mic. We did an old fashioned sand casting. I found a guy in Sacramento who would sand cast these things.