Note: Please do not link down into my pages. I change this directory structure often and your links will not work correctly.
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EIA Base ...................................... 7BM
Heater Voltage ................................ 5 V
Heater Current ................................ 7.5 A
Pentode
Input ......................................... 12 pf
Output ........................................ 6.5 pf
Grid to Plate ................................. 0.06 pf
Pentode
Plate Voltage ................................. 4000 V
Grid No. 2 Voltage ............................ 750 V
Plate Dissipation ............................. 75 W
Grid No. 2 Dissipation ........................ 30 W
For other characteristics and typical operation, see 4E27
If you are uncertain about the EIA designator for a particular tube please use the "Index" button to list all the tubes in the database. You can click on the designator for the closest tube.
(c) 1994-2021 by William A. Beech, NJ7P
Mon, 30 Jan 2023 00:43:31 -0700