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The Philpott · 16th Mar 2019, 4:34 pm

Andy- Let's hope some relevant documents survived purges of the archive, thanks.

Peter- Dynamo regulators were certainly set at a lower voltage than we see in alternators so a 15v scale would have been adequate for them at least. Lucas would be the best (only!) candidate thus far.

The wear to the case where it has been moved across surfaces (handle uppermost) suggests a lengthy stint in an environment laden with abrasive but rather fine dust. If so this factor might also be contributing to the lack of precision in the ball and socket detents of the rotary selectors.

Dave

16th Mar 2019, 4:34 pm	#13
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,105	Re: Avometer Model 40 Special (7.5mA FSD) Andy- Let's hope some relevant documents survived purges of the archive, thanks. Peter- Dynamo regulators were certainly set at a lower voltage than we see in alternators so a 15v scale would have been adequate for them at least. Lucas would be the best (only!) candidate thus far. The wear to the case where it has been moved across surfaces (handle uppermost) suggests a lengthy stint in an environment laden with abrasive but rather fine dust. If so this factor might also be contributing to the lack of precision in the ball and socket detents of the rotary selectors. Dave