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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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Old 9th May 2019, 1:02 pm   #2161
Sinewave
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Default Re: AVO Multimeter survey

What are the different variants? I can only off the top of my head think of 5.
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Old 9th May 2019, 1:10 pm   #2162
AndyGilham
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Default Re: AVO Multimeter survey

Actually, the differences I have seen are only related to the top resistance board (Or Volt former board). From early models with just wound shunts, then hand wound resistors and the introduction of wound coils in various combination and then the resistors......it just goes on!

Andy
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Old 9th May 2019, 3:03 pm   #2163
Sinewave
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Default Re: AVO Multimeter survey

Quote:
Originally Posted by AndyGilham View Post
Actually, the differences I have seen are only related to the top resistance board (Or Volt former board). From early models with just wound shunts, then hand wound resistors and the introduction of wound coils in various combination and then the resistors......it just goes on!

Andy
I see, so not variants as such, just different components used from time to time?
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Old 9th May 2019, 7:50 pm   #2164
The Philpott
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Default Re: AVO Multimeter survey

Andy, I now recall i posted details of Meter 769-2929 on the survey thread, starting at Page 72, Post No.1438 onwards. These notes are preferable to the handwritten ones, which are a bit muddled. (searching on 769-2929 i the quickest way to access it i imagine)

The peg at the rear of the early type nickel plated Z screw appears to be glass, i assume this is to prevent touching the screw with a finger affecting the needle deflection. It does look a bit fragile though, replacing the movement is delicate!

Dave

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Old 9th May 2019, 11:27 pm   #2165
sven_swe
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Default Re: AVO Multimeter survey

New unit:

AVO 8 MK5
No 0547746CE 7/84
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Old 13th May 2019, 7:00 am   #2166
AndyGilham
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Default Re: AVO Multimeter survey

Quote:
Originally Posted by The Philpott View Post
Andy, I now recall i posted details of Meter 769-2929 on the survey thread, starting at Page 72, Post No.1438 onwards. These notes are preferable to the handwritten ones, which are a bit muddled. (searching on 769-2929 i the quickest way to access it i imagine)

The peg at the rear of the early type nickel plated Z screw appears to be glass, i assume this is to prevent touching the screw with a finger affecting the needle deflection. It does look a bit fragile though, replacing the movement is delicate!

Dave

Thank you Dave, I shall compare your detailed notes with my instrument.

Regards
Andy
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Old 18th May 2019, 11:51 am   #2167
M0XNA Neil
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Default Re: AVO Multimeter survey

Acquired two AVO9 SX's and both with cases with serial numbers:


5222-1S-263 which will be February 1963.

5573-1S-163 which will be January 1963.


Both are still accurate and look as if they have never been used out of their cases.

Neil
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