Stewart the circuit is basically an RC single a high value resistor and
tantulum capacitor it fires off a switching transistor as I recall. The
circuit is on the main control board located behind the front panel. The board
is easily removed to service the board. I can circle the area when I get a
moment. I’ll follow up shortly. I have had mixed success with repairing timer
circuits. Lou
Sent from the all new AOL app for iOS
On Tuesday, January 23, 2024, 11:50 AM, Stewart G4AFF <stewart@gm4aff.net>
wrote:
Can anyone tell me how the timer works in an ETO 91b? A link to a document or
circuit would be fine - I have neither. I have an issue with my amp where it
occasionally fails to timeout. In fact it just takes too long anyway (sometimes
over 15 minutes).
73
Stewart
G4AFF
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