RTX mod. WS-18 MK III - (England 1943) - Portable radio set, operating mode AM and CW in band from 6 to 9 MHz, power ouput 0,5 W. Employed 6 tubes (3) ARP12, (2) AR8, (1) ATP4, Power requirements: dry battery with 3 V, 12 V, 162 V out in a single pack. Sectional rod antenna is packed with the set, and may be erected on the set up to 3 m high.