[Boatanchors] 4-1000 question

[Paul Baldock]

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