A selection of old Radio Equipment

Monday 20 January 2014

AVO Characteristic Meter Mark lll

AVO Valve Tester Mk 3
 

My Reserve Valve(tube) tester
When it arrived its meter was stuck on the end stop
and the overload kept buzzing and tripping out
a little bit of circuit work and a considerable amount of work on the meter
brought the beast back to life

This can test all types of normal valves , Diodes , Triodes , Pentodes, Tetrodes, indirect or directly heated.

Tests:
Inter electrode leakage/shorts
Mutual conductance
Plot Ia/Vg at a range of parameters

Fully functional but little used
Source:- My own collection
Donated by the son of a deceased colleague

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