Once the cathode heats up, won't the grids etc develop a negative voltage
due to electron emission (space charge?).

Also, if the multimeter is set to the high megohms range, there may be some
resistance measurement cathode - anode which should be polarity dependent -
and should vary depending on voltages placed on the control grids. I
wouldn't have a clue as to likely values, but it _may_ be useful for
comparitive purposes (with a known good valve as a reference).

RP


On 12/11/06, David VanHorn <dvanhorn@microbrix.com> wrote:
>
> > Other than being able to tell if filaments are not
> > shorted will a meter be able to tell me any more?
>
>
> About all you can tell with a meter is filament connection, and wether the
> filament is shorted to the cathode, (it may be designed to be) and wether
> the other elements are shorted.
>
> If you want to do a basic operational test, you'll need at least plate and
> grid voltages, and some resistors to set other grids up properly.
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