[Amps] UM4001CR pin diode source - or Alpha 86 vac relay mad

[Anthony W. DePrato]

Yes either Dick Byrd, N4UQ or Brad Focken 
(KØHM)  he designed this amp and the 89  and has a repair shop in Colo.
he repaired my 89 beta unit total turnabound time 2 weeks.
73 Tony WA4JQS