Antique Electronics and Vintage Solid State

Western Electric KS-10376 Null Voltage Test Set

Somewhere along the way I picked up a Western Electric KS-10376 Null Voltage Test Set, made by Leeds & Northrup. It's basically a three-decade Kelvin-Varley Divider with a final two-decade precision potentiometer and a galvanometer, with a switching arrangement to either connect it as a potentiometer for voltage measurements or as a Wheatstone bridge with a 10,000 Ω reference resistor for resistance measurements.

Weller 8200 Repair

I have a Weller 8200 soldering gun from my childhood. The bakelite case was pretty beat up, and held together with old dried-up electrical tape.

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One half was intact ...

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... but the other half was broken into several pieces, was missing the louvers, and had a big chip missing.

URM-105C ME-77C Battery Replacement

I bought a URM-105C off of George Rancourt at Deerchester many years ago, along with a URM-25F. George had refurbished them nicely. But I ignored the warning on the meter.

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And the AA batteries leaked and corroded the holder.

HP 410B restoration

I've been working off-and-on at restoring an old HP 410B. The fellow who sold me my HP 606A signal generator at the MIT flea many years ago practically forced his HP 410B on me. I protested that I already had a 410C, but he really wanted it to go to a good home, so I paid him a nominal sum for it. …

Triplett 310 VOM repair

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I'm working on a pair of beat-up Triplett 310 VOMs that don't respond to voltage. 

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I've popped the front cover off, but I can't figure out how Triplett intended us to work on the darn thing.

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There isn't enough slack in the wires to fully separate the front from the back.

Weston Analyzer Model 980


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I'm working on this old Weston Analyzer Model 980 VOM.

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I haven't found a manual for the plain Model 980, but I did find a manual for the Model 980 Mark II. Anyone know of a source for a manual for the original 980?

© Steve Byan 2011-2016