HF radio for armored vehicles, nicknamed ‘MÁŇA’.
Used by the Czechoslovak army since the 1950s. Used by the Arab countries from the 1950s until late 1960s, designated RM 31+RM 31-50.
Frequency range: 2.000 to 5.995 MHz, 5 KHz increments, CW (Continuous Wave morse), MCW (Modulated CW), or AM (Amplitude Modulation) voice; output power: 6 Watts CW, 3 Watts MCW, 1.5 Watts AM; using ZD-31 power supply for 12 Volts DC.
Vacuum tubes technology.
