Click for homepage
1AD4
1AD4 is a subminiature filament type, fully-shielded sharp-cutoff pentode valve (tube), designed for RF and AF applications in portable equipment. It has five wire leads that can be soldered onto a PCB directly, but can also be cut and inserted into a suitable socket, as is the case in the ST-2A.

 1AD4 datasheet

Pinout as seen from the bottom of the valve

1AD4 on this website
Hybrid mains-powered CIA surveillance transmitter ST-2A (bug)
Hybrid mains-powered CIA surveillance transmitter ST-2A (bug)
French TR-TG-2A spy radio set
Equivalents
  • RF62
  • CV2237
  • DF652
Further information
Any links shown in red are currently unavailable. If you like the information on this website, why not make a donation?
© Crypto Museum. Created: Monday 10 May 2021. Last changed: Monday, 10 May 2021 - 06:24 CET.
Click for homepage