Re: 'Megger' Circuit Testing Ohmmeter (early 1960s)
Going back to the Circuit Testing Ohmmeter, according to the Evershed and Vignoles product catalogue from 1951 (with acknowledgements to the excellent Richard's Radios website) four models were available:
0 - 3 ohms and 0 - 30 ohms
0 - 30 ohms and 0 - 300 ohms
0 - 500 ohms and 100 - 50,000 ohms (upper range reversed)
0 - 1,000 ohms and 100 - 200,000 ohms (upper range reversed)
With the exception of the first model listed, these instruments don't offer any resistance measuring capability that isn't present in any self-respecting Avometer!
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Phil
Optimist [n]: One who is not in possession of the full facts
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