Small portable batteryreceiver with
extends throughagreen plasticcase,on whicha
primitivescale in theformofanumber of
bars has been applied.
batteries andaferrite antennaare placed in three separate
The TRF radio is equipped with three
subminiature valves, made by Hivac.
The poweris provided by twobatteries:a
22.5volts battery for theanode voltage, and a 1.5 voltspenlight
battery for the filament. The energy consumption
is very low: 0.25 mA.
receivesonlyon medium wave(200-550
meters) andcan be listened towith an
Many components,such asthe
valves, the anodebattery and
earphonewere also usedinhearing
was designed by anengineerin Haarlem.
In 1955 it wasintroduced in
the Netherlandsby "Tecla
Industry andTrading Company",
Nieuwezijds Voorburgwal 314, Amsterdam.
The radio was also shown at the Jaarbeurs Trade Fair in
September and at the electronics fair Firato
in October. A brief message appeared in the October
issue of Radio Bulletin.
The certificate of
guarantee shows the
May 31,1955.The original pricewasf 89.50.