Re: AVO Multimeter survey
PMM,
I have had a look, but do not seem to have a schematic anywhere.
I have looked into the protimeter a little more this morning. It seems the Multiminor Protim came in 3 different variants.
1. The Protimeter Mark 2A
2. The Protimeter Mark 3
3. The Protimeter Grain Master
See the attached drawing from May 1959. Interestingly the 2 selectable options for the range are RESET and USE. For the Universal Avometer Protimeter, i see the same range names, not the 'TEST' or 'CHECK', but the word 'USE'
I do believe there were a number of variants of those
1. Universal Protimeter with 'CHECK' (Left Side) and 'TEST' (Right Side) - Early 1956
2. Universal Protimeter with 'TEST or USE' and 'RESET' - January 1958
2. Universal Protimeter with 'RESET' and 'TEST or USE' - January 1958
3. Multiminor Protimimeter Mk 3 - February 1958
4. Universal Protimeter with 'TEST' and 'RESET' - March 1958
5. Multiminor Protimimeter Grain Master - July 1959
6. Multiminor Protimimeter Mk 2A with 'RESET' and 'USE' - May 1959
Andy
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