[Amps] ETO 91b Timer

[gudguyham at aol.com]

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


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On Tuesday, January 23, 2024, 11:50 AM, Stewart G4AFF <stewart at 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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