BC-620 (SCR-509/510), BC-659 (SCR-609/610), RT-111/TRC-20 (AN/TRC-20) and BC-1335 (SCR-619). In a message dated 05/15/2012 16:11:15 PM Central Daylight Time, ranickel at comcast.net writes: > The CS-137 crystal box was for - what radio? > > Thanks and 73, > Bob W9RAN Robert & Susan Downs - Houston wa5cab dot com (Web Store) MVPA 9480