[R-390] AGC Line Again

[Larry H]

Ross, To check for leakage in the IF deck, you will need to temporarily
disconnect 1 end of 2 resistors, R544 and R545.  Then it should draw 0
current and measure infinity.

Regards, Larry

On Mon, Feb 17, 2020 at 11:51 AM Jacques Fortin <jacques.f at videotron.ca>
wrote:

> Ross,
>
> Could it be the AGC line leaking to GND thru one of the Mechanical Filters
> ?
> With the IF module out of the radio and not powered, you should be able to
> apply up to -100V to the J512, pin 6 without "seeing" any current
> "delivered" to the AGC line.
> If ever you measure a leakage there, disconnect R507 at S503, pin 8 and
> re-test.
> If the leakage goes to zero, your problem is inside one (or many) of the
> Mechanical Filters.
> If ever it proves to be the case, there is a turnaround to this problem
> (without re-building the offending(s) Mechanical Filters, say..)
>
> 73, Jacques, VE2JFE
>
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