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Old 6th Jan 2018, 9:18 pm   #6
pmmunro
Octode
 
Join Date: Jul 2004
Location: Dundee, UK.
Posts: 1,797
Default Re: Military AVO 8 Questions

I don't think this is specifically a NATO feature but a feature of the earliest Model 8 Mk V instruments. It may have been retained on later NATO versions or perhaps the push-on push-off style was found to be more acceptable for the commercial market.

I have somewhat vague memory of an AVO sales rep. visiting the Polytechnic where I was a (slightly) mature student at the time. i.e. Having had a real full time job before joining the course concerned. This would have been around 1971/2. Unusually some of us were invited to see this redesigned Avo meter and I seem to remember that the demonstration model had the quarter turn locking Rev MC button.

PMM
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