Re: [Johnson] Valiant I crystal oscillator won't unkey

WA5VGO hbrnut at suddenlink.net
Tue Dec 16 18:24:36 EST 2008


 From the Johnson Service Bulletin:
In some cases, very active crystals continue to oscillate under key up 
conditions. Increasing the bias on V3 stops even the most active crystals. 
Change R7 from 1 megohm to 500K 1/2 watt and R11 from 33K to 100K 1/2 watt.

I'm not sure why they would specify a non-standard value like 500K, but I'm 
sure a 470K would work fine.

73,
Darrell, WA5VGO


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