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The Philpott · 15th Mar 2019, 6:24 pm

Andy-
I have peered thro' at the edges of the scale plate and there is no part number.
'Accuracy BS1' is written at the lower edge- should that be BSI...?

Micheal-
The range knobs are standard for a Model 40, all the way up to 120v,480v, and 1,200v.
It has no significant advantages over a Model D, although arguably a bit more flexibility on resistance, with 12, 120, and also 1,200 ohms at centre scale with the 9volt internal source.

It's all a bit unusual, instinct has me thinking it's part of a small batch for a particular customer. It has certainly seen a lot of use.

Dave

15th Mar 2019, 6:24 pm	#6
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,108	Re: Avometer Model 40 Special (7.5mA FSD) Andy- I have peered thro' at the edges of the scale plate and there is no part number. 'Accuracy BS1' is written at the lower edge- should that be BSI...? Micheal- The range knobs are standard for a Model 40, all the way up to 120v,480v, and 1,200v. It has no significant advantages over a Model D, although arguably a bit more flexibility on resistance, with 12, 120, and also 1,200 ohms at centre scale with the 9volt internal source. It's all a bit unusual, instinct has me thinking it's part of a small batch for a particular customer. It has certainly seen a lot of use. Dave