Re: AVO 8 Variants (Mk1,Mk2,Mk3,Mk4...etc)
Hi Sam
LR & INS......
I've got the instruction book for a Mk5 and INS is " insulation " ie up to 200Mohm. This is done by using an external supply of 140-160v.
The Mk5 has no mention of LR but my guess is it stands for " low resistance " .
Joe
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