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Old 3rd Dec 2017, 9:29 am   #6
Radio Wrangler
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Default Re: Very odd fault with Dynatron Radiogram

Speaker impedance?

It will affect the current the amplifiers take, and thus the loop gain of an unwanted feedback path created by an iffy decoupling capacitor.

When you're close to the edge on oscillation, the sensitivity to various influences canbe amazing.

David
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