The Yaesu FT-901DM & FT-902DM Survival Guide provides specifications, maintenance tips, history and modification notes for these HF transceivers.
This Survival Guide collects information from various sources to help owners keep their Yaesu FT-901DM and FT-902DM HF transceivers in optimal condition. It includes specifications, a brief history, maintenance procedures, module descriptions, accessories, and notes on common modifications.
The guide also offers practical advice on cleaning, inspection, and safety when working on these vintage radios, and points to additional resources such as the detailed Service Manual available from the Fox‑Tango library.
| Frequency range | 10‑160 m (early models lacked WARC bands) |
|---|---|
| Modes | SSB, CW, FSK, AM, FM |
| RF Power output | SSB/CW 100 W, AM/FM 35 W |
| Sensitivity (SSB/CW) | 0.25 µV (10 dB S/N) |
| Selectivity (SSB) | 2.4 kHz @ –6 dB, 4 kHz @ –60 dB |
| Image rejection | -60 dB (160‑15 m), -50 dB (10 m) |
| Power supply | Mains 100‑235 V AC 50/60 Hz, 13.8 V DC optional |
| Current drain (receive) | 5.5 A (1.1 A with heater off) |
| Current drain (transmit) | Max 21 A |
| Impedance | 50 – 75 Ω (SO‑239 connector) |
| Dimensions | 345 × 157 × 326 mm (W × H × D) |
| Weight | 18 kg |
| Manufacture years | 1978 – 1982 |
The transceiver can be powered from mains 100‑235 V AC at 50/60 Hz or from a 13.8 V DC source.
The complete FT-901/902DM contains about 2 800 components.
The most frequent failures are the electrolytic capacitors in the power‑supply and related circuits.
High voltages ranging from 100 V to 850 V are present and can be fatal.