FRDX-400
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GENERAL
| Type | HF receiver |
|---|---|
| Frequency range | 1.7-30.1 MHz in 11 bands 160 m: 1.7-2.3 MHz 80 m: 3.5-4.1 MHz 40 m: 6.9-7.5 MHz 20 m: 13.9-14.5 MHz 15 m: 20.9-21.5 MHz 10 m A: 27.9-28.5 MHz 10 m B: 28.5-29.1 MHz 10 m C: ?-? MHz (Optional) 10 m D: 29.5-30.1 MHz (Optional) WWV: 9.9-10.5 MHz (Optional) CB: 26.9-27.5 MHz (Optional) Plus internal 6 m and 2 m converter options |
| 160 m | 1.7-2.3 MHz |
| 80 m | 3.5-4.1 MHz |
| 40 m | 6.9-7.5 MHz |
| 20 m | 13.9-14.5 MHz |
| 15 m | 20.9-21.5 MHz |
| 10 m A | 27.9-28.5 MHz |
| 10 m B | 28.5-29.1 MHz |
| 10 m C | ?-? MHz (Optional) |
| 10 m D | 29.5-30.1 MHz (Optional) |
WWV
| CB | 26.9-27.5 MHz (Optional) |
|---|---|
| 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 | Mains: 100 / 110 / 117 / 200 / 220 / 234 VAC (Fixed power cord) |
| Current drain / power consumption | Less than 50 W |
| Antenna impedance / connector | 50-75 ohm / SO-239 (HF) 50-75 ohm / SO-239 (6 m option) 50-75 ohm / SO-239 (2 m option) |
| Dimensions (W*H*D) | 368*165*292 mm (14.5*6.5*11.5") |
| Weight | 11.34 Kg (25 lb) |
| Other features | ANL. |
RECEIVER SECTION
| Receiver system | Double conversion superheterodyne 1st IF: 5.3545-5.9545 MHz 2nd IF: 455 KHz |
|---|---|
| Sensitivity | AM: 1 uV (10 dB S+N/N) SSB/CW: 0.5 uV (10 dB S+N/N) |
| Selectivity | AM (Wide), through MF3 4 KHz (-6 dB)7.5 KHz (-25 dB) FM, through MF4 with optional MF455-A240F 24 KHz (-6 dB SSB/CW/AM (Narrow), through MF2 2.4 KHz (-6 dB)4 KHz (-60 dB) CW (Narrow), through MF1, with optional MF455-03AZMF1 600 Hz (-6 dB)1.5 KHz (-60 dB) |
| Image rejection | — |
| AF output power / speaker | 1 W at 5% distortion / External only ohm |
| External speaker connector | Screw terminals, 4 and 600 ohm |
MISCELLANEOUS
| Manufactured | Japan, 1967-197x (Discontinued) |
|---|---|
| Additional info | See also the companion transmitter, the FLdx-400 There was an identical receiver called Sommerkamp FRdx-500 for the European market |
| ?? FC-2TR FC-6TR MF455-03AZ MF455-A240F MF455-AO50F | FM detector unit 25/100 KHz XTAL calibrator/marker unit Internal 2 m converter unit Internal 6 m converter unit CW filter. 600 Hz FM filter. 24 KHz AM filter. 5 KHz |
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