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

AM Amateur Radio wanted

HF, AM Amateur Radio wanted 

for my personal use

Have you a

KW Vanguard
KW 160

Heathkit DX 60

Panda Cub

Heathkit DX 100

or any HF AM transmitter for sale ?

is it a failed project or perhaps you have one rotting in a shed ?

Leave me an e-mail address

in the comments box below
(click on no comment) 

and I will get back to you

UK only thanks