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Old 9th Apr 2018, 9:36 am   #19
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Default Re: AVO CT160 - relay activates at power on

Quote:
Originally Posted by MikeViking View Post
Measuring the voltages on the top panel (via the test sockets) works for heaters and anodes, but the screen voltages are lower than the value selected by the screen switch. I need to investigate that further. If I set the screen voltage rotary pot to 100v, I would expect 100v at the test socket right? Is that not the case?
The screen volts control is not a rotary potentiometer, it's a multiple position switch. The anode and screen voltages measured on the valve sockets will not match those selected on the switches. This is because the CT160 works using AC voltages. You are advised to consult the service manual.

Measured AC voltage should be 1.1 x selected voltage -2 +6%.
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