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SPECIFICATIONS. GENERAL. Type: Amateur HF transceiver. Frequency range: 10-80 m in eight bands. 3.5-4.0 MHz (80 m) 7.0-7.5 MHz (40 m) 14.0-14.5 MHz (20 m)
SPECIFICATIONS. GENERAL. Type: Amateur HF transmitter. Frequency range: 10-80 m in 8 bands. 3.5-4.1 MHz. 6.9-7.5 MHz. 13.9-14.5 MHz.
SPECIFICATIONS. GENERAL. Type: Amateur HF transceiver. Frequency range: 10-80 m in eight bands. 3.5-4.0 MHz (80 m) 7.0-7.5 MHz (40 m) 14.0-14.5 MHz (20 m)
GENERAL. Type: HF receiver. Frequency range: 1.7-30.1 MHz in 11 bands. Plus internal 6 m and 2 m converter options. Tuning steps: Analog / continuous. Frequency stability: Less than 100 Hz for any 15 minute period after warmup. Mode: AM / SSB / CW (FM option) Channels / memory management: 4 optional. XTAL controlled. Power supply:
Yaesu HF-Transceiver FTDX-400. Coverage 80 to 10 m HAM-bands, 3 extra bands can be added; Modes: SSB, CW, AM; P in : 560 W PEP, 500 W for CW, 125 W for AM. The Yaesu SP-400 speaker matches the FT DX-400.
The FTdx400 was one of the flagship models of YAESU MUSEN Co., that was designed to provide the best performance for variety of user demands by means of tube that was the most stable electronic device at that era. In terms of SSB transceiver that consisted of tubes, FTdx400 was similar to the Heathkit SB-401 and Collins KWM-1/KWM-2 in general.
While I loved the rig, it had some shortcomings: no CW filter or provision for one; no 160 meter coverage; a 5-second carrier-on time limit while tuning because the 6KD6 sweep tube finals weren't all that rugged and no built-in fan to keep those tubes cooler.
