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Information - Help 
ID = 27748
Tube type:  Double Diode-Triode   Audio Frequency 
Identical to ABC1_7pin
Similar Tubes
Other base:

Base British-7-Pin, old (M7A) Top contact with a cap.
Filament Vf 4 Volts / If 0.65 Ampere / Indirect / Specified voltage AC/DC
Information source Taschenbuch zum Röhren-Codex 1948/49   
ABC1_7pin: my Collection
Wolfgang Thiel

ABC1_7pin: AH eigene Sammlung
Alexander Hofer


from Just Qvigstad

Forum contributions about this tube
Threads: 1 | Posts: 3
Hits: 1924     Replies: 2
ABC1_7pin (ABC1_7pin)
Rob Zanchetta

Hi, Would anyone have data for the ABC1 tube with the british 7 pin base.

Jacob Roschy


it's hard to imagine, that the data for the ABC1_7pin may differ in any way to the normal ABC1, with exception of the base diagram.

The base diagram for the ABC1_7pin is most likely the same as for the Mullard TDD4, whereas the data for the TDD4 are close to the ABC1.

Regards, Jacob

Rob Zanchetta

Thanks.. I mainly wanted to base connections...  so the tip about it being similiar to the TDD4 may be useful..  I'll compare and see if I can work suitable settings for an AVO model CT160 tube tester.


End of forum contributions about this tube

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