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Old 7th Mar 2008, 1:49 pm   #275
pmmunro
Octode
 
Join Date: Jul 2004
Location: Dundee, UK.
Posts: 1,797
Default Re: AVO Multimeter survey

You have probably successfully, unwittingly (and surprisingly), misled my learned friend SPCH over the serial number and date. (Why should only the lawyers got to call each other LFs - SPCH is as well eductaed as any of them).

If the meter has a serial number with 27 as its leading figures it seems very likely that it is from August 1937, but does it have a divided by two button? If it does then it's not a 20-range meter but a 36-range one. The 20-range was, as far as my research and memory serve, superseded in 1933 by the 34-range meter which in turn became the 36-range version. It couldn't be 1927 as the first Universal Avometer was the 20-range in 1932 and by 1947, the serial numbers had the later pattern. All of these had fuses.

PMM.
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