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
- posted
16 years ago
UK Moving coil meter repairer ?
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- posted
16 years ago
These people
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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
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- posted
16 years ago
Many thanks for that. I've emailed them and will let you know the outcome.
Jim Hawkins
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- posted
16 years ago
AVO in Dover and Farnell in Wetherby both provide repair and calibration services.
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Best Regards:
Baron.
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- posted
16 years ago
Not for moving coil meters.
Jim Hawkins
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- posted
16 years ago
Sorry to hear that Jim. Although I must confess I have never heard of the movement going open circuit on an AVO before.
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Regards:
Baron.
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- posted
16 years ago
Gerry at Crowthorne Tubes might be worth trying.
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- posted
16 years ago
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
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- posted
16 years ago
Neither want to know.
Jim Hawkins
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- posted
16 years ago
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