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ID = 22572
Tube type:  Vacuum Pentode 
Identical to 12HL7

Base Noval, 9 pin miniature (USA pico-9) B9A
Filament Vf 12.6 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC
Description Durch Heizfaden-Mittenanschluss auch Betrieb mit 6.3 V und 0.6 A möglich. 
Tube prices 1 Tube prices (visible for members only)
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12hl7_sockel.png 12HL7: RCA Tube Manual
Peter Hoddow

Just Qvigstad
12HL7: RCA Tube Manual
Peter Hoddow



Forum contributions about this tube
Threads: 1 | Posts: 1
Hits: 3227     Replies: 0
12HL7 (12HL7) Suppressor action
Joe Sousa

The following plots show the effect of bias voltage at the suppressor grid g3.

Further discussion of g3 action can be found at:

Right-click and view or save these plots for higher resolution.



End of forum contributions about this tube

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