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Fix my VTVM

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Henry G.

New Member
John,

You may have meter static build up. This would give you very unreliable meter readings. Never polish the plastic meter face! It creates a significant static charge. The Meter is a very good capacitor. The plastic face cover, the metal plate, and the plastic meter back make a dandy capacitor that can randomly freeze the needle. Carefully!!!! pry off the cover and wash it in mild dishwash detergent. Air dry!!!! Run a #2 graphite pencil around the perimeter of the meter cover. The graphite can bleed off some of the charge. You may notice a rough dull coating on the lower portion and around the meter. This was the origional esd control applied at the factory. Also if the 4 meter mounting bolts are insulated from the metal plate by tape this adds to the capacitive effect. Remove the tape and use a washer to raise the screw head grounding the metal meter plate to the screw to the chasis. Well worth the try. Good luck.
 
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John1397

New Member
Did finally get it to work

Seems I had changed a resistor and must have forgotten to soldier one end into circuit board.

John
 

tunedwolf

Well-Known Member
Seems I had changed a resistor and must have forgotten to soldier one end into circuit board.

John
Well done! I bet you are glad it's back to it's good old self again!
I love my VTVM, there is just nothing quite like it for valve amp work...

rgds
 
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