Description
The Telefunken Torn.E.b /24b-305 (Spez 976 Bs) receiver
was the end product of a series of Telefunken ‘portable’
receivers developed mainly for field use from the late 1920s
onwards. They were intended for use both as a general purpose field receiver and as an accompanying receiver for a
number of transmitters of the type normally found installed
in signals trucks. The receiver frequency coverage is from
100kHz to 6670kHz.
The earliest version was designed by Telefunken in the late
1920s as Spez 276 Bs and this was revamped in the early
1930s as Tornister Empfanger (portable receiver) Spez 445
Bs. By later standards it could be described as clumsy. Not
unlike the National HRO, it employed plug-in coil units
(three of them marked Kurz, Mittel and Lang) to cover the
frequency range (see cover photo). The circuit employed four
triode valves type RE 074 powered from a 90 volt battery and
a 4.8 volt alkaline accumulator (type NC10). Radio, batteries
and accessories were all in one case – quite a load for the
signalman! With the development of the military general purpose two volt filament pentode valve (RV2 P800) the set was
redesigned and split into two cases, one for the radio and one
for the batteries and accessories. If necessary, the two cases
could be clipped together.
The plug-in coil system was dispensed with and replaced
by an integral rotating coil turret. Trials with this equipment
pointed to a need for some ergonomic improvements and
some simplification of controls and other slight changes
resulted in a more ‘user friendly’ front panel. The rectangular power supply plug and socket were replaced by a circular
five pin connector which became standard for much field
equipment. Thus, in 1936/37 the Telefunken Torn.E.b Spez
976 Bs was accepted for Wehrmacht use as the Torn.E.b/24b305 ( also known outside Germany as the AE95).
Comments:
This is an early model, with the original morse code handset, with Waffenamt stamps.
Price includes shipping in the USA – if you are in Europe let us know via email which shipping method you would like due to weight.
