photo thanks to Pedro Vidal Terrasa
AN/FRT-10 transmitter
photos thanks to NF7M
500 kw LF 100-200 kc CW/FSK - spec
sheet
dual 250 kw transmitters
diesel engines for p/s
installed at Guardamar del Segura, Spain
Info from John Cobb:
"The AN/FRT-10 was unique, a 500 kW LF giant tuning 100 - 200 kHz. It was in two amplifier bays, which we drove alternately with an external TMC
synthesized exciter stack, running the single-channel KSUB broadcast at about 50 kW. It fed a 1200-foot tower, through 8-inch rigid coax and a big
variometer/capacitor network in the helix house. The amplifier bays each
consisted of IPA and driver stages for the finals: four air-cooled 6697 triodes in grounded-grid push-pull configuration!"
