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The Philpott · 12th Dec 2018, 10:55 pm

At more or less the same time as the High Resistance DC 'minor was released there was the Low Resistance Ohmmeter based on the same (reinforced/stepped side) casing as the HR. I know of two in existence, one of which is in poor condition from impact damage and corrosion. Instrument No.370 made in Apr 1941 and No.375 in May 1941. Both restored as far as possible.

The movement of the LRO appears to be of a unique current rating, and as with all meters based on this casing the glass is perilously thin, meaning it is not a pocket meter in the truest sense.

Dave

12th Dec 2018, 10:55 pm	#1864
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,107	Re: AVO Multimeter survey At more or less the same time as the High Resistance DC 'minor was released there was the Low Resistance Ohmmeter based on the same (reinforced/stepped side) casing as the HR. I know of two in existence, one of which is in poor condition from impact damage and corrosion. Instrument No.370 made in Apr 1941 and No.375 in May 1941. Both restored as far as possible. The movement of the LRO appears to be of a unique current rating, and as with all meters based on this casing the glass is perilously thin, meaning it is not a pocket meter in the truest sense. Dave