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Mutual Conductance Tube Tester
Mutual Conductance Tube Tester
Fine instruments though they are, I can't afford the silly prices that Avo VCMs seem to command nowadays. But I found this nice valve tester on eBay at very reasonable cost.
It came with a comprehensive list of settings and data for all sorts of valves.
The red "valve holders" are really pin straighteners - quite handy for B9A, B7G etc.
It also tests tran***tors!
Mutual conductance is measured dynamically, with the aid of an inbuilt 6AT6 valve oscillator.
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