Re: Sourcing batteries/cells thought to be obsolete.
If my memory serves me correctly, it was the Avominor (only) which used the U10 cell. This can be furnished from 1/3 of a 1289.
The Avo 7 used originally a square section 1.5V cell with a flying negative lead and a thumbscrew positive terminal, but most have been modified to take a single C cell. My model 7 Mk II has Avo's own adaptor consisting simply of a paxolin frame with two phosphor bronze strips to provide the connections. It works well enough.
I can see no problems in using alkaline cells in Avometers with the added advantage that reputable makes seldom leak. An alkaline AA cell will out-perform a zinc-carbon U10 and can be fitted to an Avominor with a spacer sleeve and end caps.
Leon.
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