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1T4
The 1T4 is a miniature screened pentode for use in battery-powered devices. It has a B7G base and was introduced around 1940. Pinout as seen from the bottom of the valve.

➤ 1T4 datasheet

Pinout as seen from the bottom of the valve

1T4 on this website
GPO interference investigation receiver WT No. 11
The UK Type 36/1 (MCR-1)
Norwegian Receiver Type 31/1 (Sweetheart)
Polish OP-3 (Type 30/1) WW-II clandestine receiver
First hand-held two-way radio
RBZ receiver (WWII)
RBZ
Belgian post-war version of the UK Type 36/1 (MCR-1), made by MBLE (Philips)
RS-1 (AN/GRC109)
Portable radio direction finder (US, 1942)
RZ-301 Pospisil (CZ)
Equivalents
  • 1F3
  • CV785
  • DF91
  • VT-173
  • W17
Further information
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© Crypto Museum. Created: Sunday 01 January 2023. Last changed: Sunday, 01 January 2023 - 11:53 CET.
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