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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 22nd Sep 2018, 10:51 am   #1
cinema1
Triode
 
Join Date: Jun 2008
Location: Preston, Lancashire, UK.
Posts: 36
Default AVO MODEL 8 mrk 11

Hi,
the AV0 meter 8 as two faults------no reading on the a/c range-----ohms-x 100 range will not zero.
I bought this meter from a car boot sale, can any one help in regards to a good starting --point to repair, I replaced the batterys.
can any one help.
kind regards .
Eric.
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Old 22nd Sep 2018, 2:14 pm   #2
Herald1360
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Location: Leominster, Herefordshire, UK.
Posts: 12,465
Default Re: AVO MODEL 8 mrk 11

Is the 15V battery good?

AC ranges could be the rectifier or current transformer perhaps. Have you got the circuit diagram?
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Old 22nd Sep 2018, 6:42 pm   #3
Superscope
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Join Date: May 2017
Location: St Austell, Cornwall, UK.
Posts: 105
Default Re: AVO MODEL 8 mrk 11

Hi Eric,

Herald1360 has pretty much summed up the most likely culprits.

Check out this similar thread which deals with a similar problem
https://www.vintage-radio.net/forum/...d.php?t=147029

Regarding the Zeroing of the x100, definitely check the 15V Battery,
but don't forget to check for any corrosion on the Contacts and make
sure their clean.
This can catch people out.


Ian
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