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Old 25th Apr 2022, 2:34 pm   #2899
The Philpott
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Join Date: Aug 2016
Location: Colchester, Essex, UK.
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Default Re: AVO Multimeter survey

Further to what Jerry has mentioned, there's one other source of quiescent drain (just about) worth mentioning, and that's on the Avo Model 7. It appears that at some point in WW2 a mod. to the basic design was carried out which biased the rectifier slightly for AC readings using a trickle from the 1.5volt cell..thus ideally when idle the meter is not left at an AC setting. (The current is very minimal, and is typically indicated by the needle nudging upwards very slightly)

Dave
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