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Old 24th January 2007, 07:53 AM   #1
AuroraB is offline AuroraB  Norway
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Default AVO tube tester spares

I just managed to salvage the old AVO VCM 163 tube tester we had stuffed away here at work.
One of the thumdwheels are broken, though....
Anybody seen any sources for spare parts ??????
( I do have the manuals....)
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Old 24th January 2007, 10:14 AM   #2
EC8010 is offline EC8010  United Kingdom
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First, let me tell you that taking apart one of those thumbwheel assemblies and reassembling it is not for the faint-hearted. I took apart and reassembled an assembly from an earlier tester...

I don't have the old assembly and my VCM163 to hand, so I can't confirm that the thumbwheels are the same. They might be. What you could do is to take the thumbwheel assembly apart and move the broken thumbwheel to a less frequently used position such as pins 12 and 13. You might even be able to glue the broken thumbwheel back together while you're at it. At the same time, you could give the internals of the thumbwheel assembly a good clean. This will enable better contacts and reduced friction will mean you stress the thumbwheels less as you use them.

Before you do all this work, I'd check that the rest of the tester works.
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Old 24th January 2007, 12:10 PM   #3
AuroraB is offline AuroraB  Norway
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Quote:
Originally posted by EC8010
First, let me tell you that taking apart one of those thumbwheel assemblies and reassembling it is not for the faint-hearted.


You bet I do know!!! I've been in the business of ancient electronics life prolongation for more than 30 years............

Does this mean that you might have one or two spare sections??
The old switch was swapped for a row of pin connector, which works of course, but still look kind'a silly!
Does it work ? - I don't know! I used it some 20 years ago, and it was OK then. It needs some touching up, for sure, but right now my home work desk is completely covered in house renovation tools and stuff!
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Old 24th January 2007, 01:20 PM   #4
EC8010 is offline EC8010  United Kingdom
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No, I don't really have a spare. One of these days, I intend to make a curve tracer, and when I do, it will need a selector switch to connect it to the sockets...
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Old 24th January 2007, 02:39 PM   #5
AuroraB is offline AuroraB  Norway
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I do have some thumbwheels, but none that fits the VCM...
Do you have switches that are AVO compatible, and how many sections do you need for your project????
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Old 24th January 2007, 03:56 PM   #6
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Hi AuroraB,
Give this guy Gerry a call/email. He specialises in repairing/selling valve testers of all types and may have some spares

Gerry
Crowthorne Tubes, Berkshire, UK
www.crowthornetubes.com
sales@crowthornetubes.com
Tel: +44 (0)1344 776542
1000 2000 hours mon - sat

John Caswell
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Old 26th January 2007, 11:15 AM   #7
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I bought a new thumbwheel set for the AVO from Colomor. I don't know if he has any more. Mine was for the AVO mk 4.
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Old 26th January 2007, 08:43 PM   #8
bolly is offline bolly  Canada
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congrats on getting a vary desireable tester AuroraB, I have one and am still learning how to use her, sorry though, I don't have any parts for you. I just wanted to congratulate you!
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