[ARC5] Drift in BC-453, possibly BFO...

[Kenneth G. Gordon]

On 11 Dec 2017 at 17:17, arc5 at ix.netcom.com wrote:

> Simple ( if you're not using a product detector):  Turn off the internal BFO and use a 
> known-stable signal source for BFO injection.  Loose-couple just about anywhere near the 
> converter or IF.  This will either confirm or eliminate the bfo as the source of the problem.

Correct.

BTW, there is a small temperature compensating capacitor for the HFO mounted on the 
bottom of the 12K8 socket. It is one of those "dog-bone" types, usually white.

If that is missing or defective, drift will be very noticable.

This has nothing to do with the BFO of course.

Ken W7EKB

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