TM-331A
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GENERAL
| Type | Amateur VHF transceiver |
|---|---|
| Frequency range | USA TX: 220-225 MHz RX: 220-225 MHz |
| Tuning steps | 5 / 10 / 12.5 / 15 / 20 / 25 KHz |
| Frequency stability | ±10 ppm @ -20 to +60°C (-4 to +140°F) |
| Mode | FM |
| Channels / memory management | 20 regular 1 call 4 odd splits 1 priority 1 program scan pair RAM storage with lithium battery backup |
| Repeater shift / offset | ±1.6 MHz |
| Power supply | 13.8 VDC ±15% |
| Current drain / power consumption | RX: Max 600 mATX: Max 6.5 A |
| Antenna impedance / connector | 50 ohm / SO-239 (On pigtail) |
| Dimensions (W*H*D) | 140*40*160 mm (5.51*1.58*6.3") |
| Weight | 1.2 Kg (2.65 lb) |
| Other features | CTCSS/PL encoder. |
RECEIVER SECTION
| Receiver system | Double conversion superheterodyne 1st IF: 30.825 MHz 2nd IF: 455 KHz |
|---|---|
| Sensitivity | 0.16 uV (12 dB SINAD) |
| Selectivity | 12 KHz (-6 dB)24 KHz (-60 dB) |
| Image rejection | — |
| AF output power / speaker | 2 W at 5% distortion / 8 ohm |
| External speaker connector | 3.5 mm |
TRANSMITTER SECTION
| RF output power | HighMidLow 1.25 m:25 W10 W5 W |
|---|---|
| 1.25 m | 25 W |
| Modulation system | Reactance modulation |
| Max FM deviation (Factory set) | ±5 KHz |
| Spurious emissions | Better than -60 dB |
| Microphone impedance / connector | 500-600 ohm / 8-pin (Metal locking ring connector) |
| Microphone input level | — |
MISCELLANEOUS
| Manufactured | 1989-199x (Discontinued) |
|---|---|
| Additional info | — |
| DRU-1 IF-20 MB-201 MC-44 MC-44DM MC-44DME MC-44E MC-55 MC-60A MC-80 MC-85 PG-2N PG-3B PG-4H PG-4J PS-50 PS-430 RC-10 RC-20 SP-41 SP-50B SP-430 TSU-6 | Digital recording unit Interface unit Mobile mounting bracket Multifunction microphone Multifunction microphone with autopatch Multifunction microphone with autopatch (Europe) Multifunction microphone (Europe) Mobile microphone Desk microphone with up/down buttons Omnidirectional desk microphone with up/down buttons Unidirectional desk microphone with up/down buttons DC power cable DC line noise filter Interface connecting cable Extension cable kit Power supply. 13.8 VDC, 20 A Power supply. 13.8 VDC, 10 A (20 A peak) Remote controller / handset Remote controller / panel Mobile speaker. 4 ohm Mobile speaker. 8 ohm External speaker CTCSS/PL decoder unit |
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