Self-made HF CW (morse code) transmitter, used by the Haganah Signal Service in clandestine stations during 1945 – 1948.
Based on 1624 vacuum tube (power pentode).
Output power: ~25 Watts.
Frequency range: 2 to 12 MHz.
Unique power supply (2.5 Volts filament voltage, 300 Volts high voltage).
