The T9K39 had 12 tubes.

The quality of its parts and assembly was rated as "very well constructed" by Allied examiners after the war.

Ant. Kopplg. = antenna coupling

Ant. Umschalter = antenna switch

Regelung = control

Aus = off

ohne Regelung = without control

Kopfhorer = headphones

Oberlagerungsempfanger = heterodyne receiver

Photo by Bruce Culp

Photo by permission of Stg.C.D.V.&T.