In parallel to their E52 / E44 receivers, Autophon developed a VHF - receiver;
because of the use of the VHF range for military tactical communications
was still quite far in the future, only a small test series of this receiver
has been made on behalf of the Airforce / Anti-Aircraft troops.
The front panel is divided in two sections by the horizontal linear dial
of the turret tuning arrangement.
Above the dial, You find from the left hand the coaxial antenna connector and
the sockets for connecting longwire antenna and earth, then the station clock, and the signal strength meter. This can be switched to
indicate the heaters and plate / B+ voltages. At the right upper corner, You find
the mains socket, the mains voltage selector and mains switch and some fuses.
Underneath the frequency dial, You find the rotary band switch operating the
turret tuner - find the corresponding dial in the dial window - and at the right hand the
main tuning knob with a mechanical blocking arrangement. Next to this one the
switch for the two different IF bandwidths of +/- 20 and +/- 75 kHz.
In a row of controls below, You find from the left the volume control ("Lautstärke" or
"Puissance"), the noise limitetr switch, speaker and headphone jacks,
the AGC/RF gain control, the BFO control for CW reception, the tone and the AM/FM
reception mode switch.
In 1947, only a small preliminary series of eleven receivers of this set
has been produced, only four of them remained with the Signals Comp. 20