Re: AVO Multimeter survey
Latest acquisitions, two model 9 Mk IV. Serial numbers 15467 & 15470, both 24/10/70. There are no stickers anywhere within and those on the outside are damaged so the at the first two figures are hard to read but I am fairly sure are correct.
Both are intermittent in operation and I have noted that silver migration problems relative to the rotary switches is common. First inspections have not disclosed anything and I would very much appreciate advice regarding what to look for and if the problem exists, how to fix it.
Also please, is there a copy of the service manual, or a circuit diagram, available anywhere on the net?
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