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Old 8th April 2014, 05:09 PM   #1
jblmar is offline jblmar  United States
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Join Date: Dec 2005
Location: Brooklyn, New York
Default Lafayette VTVM6

Anyone familiar with this VTVM?
Not much info on the 'net.
Seems like it was modeled after the RCA Senior Volt Ohmist.
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Old 8th April 2014, 08:54 PM   #2
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Location: St Louis, Mo
I think just about everybody's VTVM used the same basic schematic, with some variations on exact component values, tube types, etc. If I had such an instrument and wanted service info I'd download an RCA tube manual from the early 60's, find the VTVM example circuit, and start tracing out my instrument's circuit - noting differences between the example and my hardware. There shouldn't be more than a couple of tubes and a few dozen components in the thing. The worst part will probably be working out the function and range switches.

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Old 9th April 2014, 12:06 AM   #3
jblmar is offline jblmar  United States
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Join Date: Dec 2005
Location: Brooklyn, New York
From what I see on schematics of various VTVMs your correct. Aside from tubes which I no nothing about (which side is up?), the rest of the circuits are basically the same.
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