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Author Topic: cut vca switch  (Read 5603 times)

Toni Quintana

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cut vca switch
« on: July 03, 2020, 11:34:41 PM »
it has started to smell burnt out and the cut switch on the group 1 vca suddenly lights up very dimly.  Which card should I check?
Thank you
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horizonsound

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Re: cut vca switch
« Reply #1 on: July 04, 2020, 01:44:42 AM »
Possibly the BFR39 / BFR80 transistors on the CF80E20 card.
If these blow through, the adjacent 10R resistors will probably burnout as well. The evidence will be clear.
I had this happen to a few of my VCA groups.

Anthony.
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Toni Quintana

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Re: cut vca switch
« Reply #2 on: July 08, 2020, 11:00:24 AM »
That is what has happened, thank you very much
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