| Type: | Amateur VHF transceiver |
| Frequency range: | 144-146 MHz (5 / 1 / 0.1 KHz steps) |
| Mode: | FM/SSB/CW |
| RF Power output: | 1-10 W |
| Receiver system: | N/A |
| Sensitivity: | SSB/CW: Better than 0.5 uV (10 dB S+N/N) FM: Better than 0.6 uV for 20 dB noise quieting |
| Selectivity: | SSB/CW: 2.4 KHz (-6 dB), 4.8 KHz (-60 dB) FM: 15 KHz (-6 dB), 30 KHz (-60 dB) |
| Image rejection: | More than 60 dB |
| Voltage: | 13.8 VDC or mains |
| Current drain: | RX: Max 0.6 A TX: Max 2.3 A |
| Impedance: | 50 ohms, SO-239 |
| Dimensions (W*H*D): | 241*111*264 mm |
| Weight: | 5 Kg |
| Manufactured: | Japan, 1980-198x (Discontinued) |
| Other: | 3 memories |
 IC-251_block_diagram.pdf | 81 kB |
 IC-251_modifications.zip | 673 kB |
| IC-251_pcb.pdf | 8779 kB |
| IC-251_schematic_diagram.pdf | 574 kB |
| IC-251 - user manual | 6927 kB |
