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ID = 16378
Brand: Lorenz; Berlin, Zuffenhausen u.a.
Tube type:  Triode, vacuum   Power/Output 
Identical to S321

Base Europe side contact P8A (Au P, 8SC) (Codex=Sc)
Was used by Military and/or Government
Filament Vf 6.3 Volts / If 2.2 Ampere / Indirect / Parallel, (AC/DC)

This tube was also used in the target radar FuMG 40L of the German Wehrmacht in different stages.

Unfortunately, information about the S321 in the tube databooks are very unreliable. Mr. Heiko Bruntsch was able to measure one with the following results:

At Va = 200V and Vg = 21V the Ia = 85 mA.

The slope at this point is 7 mA/V and the µ ~ 6

The "Röhren-Codex 1948" shows a wrong base diagram.

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Information source -- Collector info (Sammler)   
Rudolf Osterkamp

S321: Tabu Röhren-Codex, 1951
Anonymous 15 Collector

S321: H. Bruntsch
Heiko Bruntsch

from Just Qvigstad

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