The meter on my AVO VCM has gone open-circuit. The movement is undamaged, swinging freely as it's now undamped. Is there a repairer in the UK anywhere ?
Jim Hawkins
UK Moving coil meter repairer ?
Jan 26, 2008
9 Replies
These people
formatting link
15 years ago when they traded as Test Instrument Services at the same address. Contact them and please report back whether they still do or do not.
-- Diverse Devices, Southampton, England electronic hints and repair briefs , schematics/manuals list on
formatting link
Many thanks for that. I've emailed them and will let you know the outcome.
Jim Hawkins
AVO in Dover and Farnell in Wetherby both provide repair and calibration services.
Best Regards:
Baron.
Not for moving coil meters.
Jim Hawkins
Sorry to hear that Jim. Although I must confess I have never heard of the movement going open circuit on an AVO before.
Regards:
Baron.
Gerry at Crowthorne Tubes might be worth trying.
formatting link
Emailed Inmar, but no reply so far. Found a company (Glanford Electronics Ltd.), who offered to have a go, but it didn't sound very hopeful. I've sent it to them, but still awaiting the outcome. But I've since found another company (Crowthorne Tubes Ltd) who offer a replacement moving-coil movement which can be installed in the original Avo meter case, and using the same dial. Their trick is to use a 1mA movement (much more robust than the 30 microamp original Avo one) and feed it with a suitable opamp! Neat!
Jim Hawkins
Neither want to know.
Jim Hawkins
Yes! Many thanks for that. He has a much better solution than trying to fix a 30 microamp movement! (See my reply to N Cook above)
Jim Hawkins
Join the Discussion
Have something to add? Share your thoughts — no account required.
Didn't find your answer?
Ask the community — no account required