HF Receiver/Transmitter in a wooden suitcase, used by the Haganah Signal Service and by Gideonim in secret stations and illegal immigration vessels.
Made during 1941- 1947 in secret workshops, in several models: TFR, TXR, FDR, TZR, KSR, MSD.
Some models worked only in morse code (CW), others enabled voice (AM).
Some models were crystal controlled, other had VFO (Variable Frequency Oscillator).
Output power: 7 Watts for earlier models, 15 Watts for later models.
Frequency range: 2 to 12 MHz.
Vacuum tubes technology, regenerative receiver.
Power supply: 220 Volts AC or batteries.
