AM 690 Underground Radio

24 hours per day - neighborhood coverage - none of the hits!

Truly underground, the station is located in an old bar room, part of a basement den, near the breaker box.

An Atom core low power computer runs a continuing auto DJ, random music tracks, PSAs and podcasts, with software processing

Transmitter on the left, tuner on the right

5 watts output

Tuned DDS VFO locks frequency

Originally the TX-5 used a crystal for 610 khz.

How AM 690 couples to the line