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Coated-filament type used in power supply of transmitting and industrial equipment. Requires small four-contact socket and may be operated in vertical position only, base down.
Bulb .......................................... ST-12
Base Type ..................................... 4-Pin
Maximum Overall Height ........................ 4.688 In.
Maximum Seated Height ......................... 4.063 In.
Maximum Diameter .............................. 1.563 In.
EIA Base ...................................... 4P
Filament Voltage .............................. 2.5 V
Filament Current .............................. 2 A
Diode
Peak Inverse Plate Voltage .................... 7500 V
Rectifier
Output Voltage ................................ 2200 V
Output Current ................................ 125 mA
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
Tue, 21 Mar 2023 03:12:05 -0700