{Collins} 30L-1, keyed down current @ no excitation.



Hello All

Concerning the preparation of my two 30L-1 for proper use, I just wonder about the key down current (no excitation).
 
When I activate the key at 1800 VDC on both Amp's the current readings on the meters (D.C.Amps.) reach 200mA.
 
According to the instruction book 110 mA is indicated.
 
Tubes are brand new Penta 811A.
R21, R22, R23 and R24 brand new.


I wonder about the difference.

Is someone able to inform me what controls this current and what can cause this difference?

Has anyone experienced something similar ?

Thanks in advance.

Br.

Bent
OZ5ZD





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