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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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11th Jun 2021, 1:20 pm | #1 |
Triode
Join Date: Feb 2021
Location: London, UK
Posts: 10
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AVO 2 Panel - restoration ideas?
I have an AVO 2 Panel tester which doesn't work. Don't know why - meter lost magnetism or what. Before I open up the meter part I'm wondering what's the simplest fix. One easy solution it seems would be to use the panel part and make a basic emissions tester from scratch to connect to it. If so, what's the 9 pin connector - a B9G? Diameter of pins is 26mm in a straight circle.
Any ideas for a basic emissions tester, circuit etc? I have bench supplies at 30v/2A or 15v/4A for the heaters and grid bias. I could rig up a basic HT and use a 150v glow tube for instance. I'd use a multimeter to read off results. I only intend to measure smaller input tubes and maybe some outputs like 6L6, 6V6 etc. Nothing exotic or bigger. Or if I open up the Meter unit, can I substitute a couple of test points for the meter and use a multimeter instead? |
11th Jun 2021, 1:49 pm | #2 |
Dekatron
Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 13,454
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Re: AVO 2 Panel - restoration ideas?
Last edited by ms660; 11th Jun 2021 at 2:05 pm. Reason: additional info |
11th Jun 2021, 4:05 pm | #3 |
Triode
Join Date: Feb 2021
Location: London, UK
Posts: 10
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Re: AVO 2 Panel - restoration ideas?
Thanks - I've ordered a B9 socket. Now I need to figure out an easy build for a way to test emissions.
ideas? |
12th Jun 2021, 6:50 am | #4 |
Nonode
Join Date: Jun 2016
Location: Bognor Regis, West Sussex, UK.
Posts: 2,300
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Re: AVO 2 Panel - restoration ideas?
The AVO 2 panel has the same horseshoe magnet as the AVO 7 and seems to suffer from loss of magnetism. I have tried re-magnetising the magnet and replacing it with a neobium magnet.
I reported my adventures here: https://www.vintage-radio.net/forum/...d.php?t=165159 I have also breadboarded a digital meter replacement for the AVO 2 panel using peak detection and sample and hold, this works well on the bench on simulation, I am trying to find the main panel from a 2 panel AVO tester with a duff meter to fit it into. see here: https://www.vintage-radio.net/forum/...7&postcount=14 Peter |