| GENERAL |
| Type: | Amateur HF transceiver |
| Frequency range: | TX: 10-160 m + WARC MHz
RX: 0.1-30 MHz |
| Tuning steps: | Down to 10 Hz |
| Mode: | AM/FM/SSB/CW/FSK |
| Channels/memory management: | 60 regular (duplex)
1 scratch pad
1 programmable scan (1 band edge pair)
Non-replaceable backup battery (inside CPU!) |
| Repeater shift/offset: | No dedicated. Use VFO A/B split instead |
| Power supply: | 13.8 VDC |
| Current drain/power consumption: | RX: Max 2 A
TX: Max 20 A |
| Antenna impedance/connector: | 50 ohms / SO-239 + 1 phono(RCA) for RX only |
| Dimensions (W*H*D): | 375*146*432 mm (14.75*5.75*17") |
| Weight: | 7.25 Kg (16 lbs) |
| Other features: | Full QSK. RS-232C. VOX. NB. PBT. Transverter jacks. |
|
|
|
|
| RECEIVER SECTION |
| Receiver system: | Triple conversion superheterodyne
1st IF: 70 MHz
2nd IF: 9 MHz
3rd IF: 6.3 MHz (455 KHz for FM) |
| Sensitivity: |
AM (10 dB S/N):
0.1-1.6 MHz: 3.5 uV
FM (12 dB SINAD):
0.1-1.6 MHz: 1 uV
SSB/CW/FSK (10 dB S/N):
0.1-1.6 MHz: 0.5 uV
|
| Selectivity: |
AM: 6 KHz (-6 dB), 11.25 KHz (-60 dB), standard filter
FM: 15 KHz (-6 dB), 30 KHz (-60 dB), standard filter
SSB/CW: 2.4 KHz (-6 dB), 4.5 KHz (-60 dB), standard filter
|
| Image rejection: | >80 dB |
| AF output power/speaker: | 1.5 W at 2% distortion / 4 ohms |
| External speaker connector: | 1/4"-jack, 4-16 ohms |
|
|
|
|
| TRANSMITTER SECTION |
| RF output power: |
0-100 W (100% duty cycle up to 20 minutes)
|
| Modulation system: | SSB: Balanced modulation |
| FM deviation: | ±5 KHz |
| Spurious emissions: | Less than -45 dB |
| Microphone impedance/connector: | 200 ohms to 50 Kohms / 4-pin |
|
|
|
|
| MISCELLANEOUS |
| Manufactured: | USA, 1993-199x (Discontinued) |
| Additional info: | |
| Related documents: | User manual (11.8 MB) |
| Modifications: | |
| Options/Accessories: |
236
238
239
257
259
282
285
288
305
700C
705
961
5061
RM-500
|
Remote control cable for connecting to either 253 or 420
2 KW manual antenna tuner
Dummy load
Voice synthesizer
Universal ALC annunciator
250 Hz CW filter. IF: 6.3 MHz
500 Hz CW filter. IF: 6.3 MHz
1.8 KHz SSB filter. IF: 6.3 MHz
Serial level converter
Electret hand microphone, 4-pin
Electret desk microphone, 4-pin
Power supply. 13.8 VDC, 22 A. Built-in speaker
Lowpass line filter
Rack mount kit
|
|
