[Boatanchors] [AMRadio] 4-1000 question

[Paul Baldock]

Based on the replies of been getting, I should have highlighted 30mA 
grid current WITHOUT DRIVE APPLIED.

Thanks

- Paul

At 03:50 PM 11/6/2012, Paul Baldock wrote:
>I have acquired a LK-2000 linear that uses a 4-1000 in grounded grid,
>zero bias. B+ is around 3400V. Control Grid and Screen Grid are both grounded.
>
>When I go to transmit (no rf applied) the standing plate current is
>about 140mA which is good. However the Grid Current (Ig1+Ig2) is
>about 30mA - I would have thought it should be zero but I am not that
>familiar with using Tetrodes as Triodes.
>
>I tried a second tube (they are both pulls) with very similar results.
>
>It does not appear to be a metering issue.
>
>Is this normal?
>
>Thanks
>
>- Paul   KW7Y
>
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