In article , MoiInAust wrote:

Yes, but the details are in a distant workshop. From memory it was an AVO
model 40, probably 1,000 ohms per volt that was specified. I am measuring
with a very high impedance Fluke! (Probably 11 megohms). Perhaps that's it!
On the other hand the other voltages are all within limit.

That would do it, yes. Try a Simpson 260.

With a DMM, you will read much higher than an old moving-coil meter when
reading high impedance sources (like plates... the plate resistor is a
very high value quite often).
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."