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Old 22nd Jun 2012, 11:31 pm   #7
AlanC
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Join Date: Jul 2006
Location: Sheffield, South Yorkshire, UK.
Posts: 312
Default Re: NAAFI receiver problem

Hi Malcolm, the voltages don't look too out of the way, for now. Yes the LO is a bit off but you'd still hear something at that if was working. We need to find out why no IF signal is getting through- I think thats where your problem lies, not In the front end. The g1 voltage on the AGC controlled stages will be slightly negative, even under no signal conditions due to a phenomenon called contact potential, caused by ele trons landing on the grid. But all the theory aside, we need to find that IF problem!
Cheers,
Alan
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