TH-31BT
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GENERAL
| Type | Amateur VHF transceiver |
|---|---|
| Frequency range | USA TX: 220-225 MHz RX: 220-225 MHz |
| Tuning steps | 5 KHz |
| Frequency stability | ±? ppm |
| Mode | FM |
| Channels / memory management | None |
| Repeater shift / offset | -1.6 MHz |
| Power supply | 5.8-10 VDC (7.2 VDC nominal) |
| Current drain / power consumption | RX: 30 mA (Squelched)TX: 350-650 mA |
| Antenna impedance / connector | 50 ohm / Threaded phono |
| Dimensions (W*H*D) | 57*120*28 mm (2.24*4.72*1.1"), with PB-21 |
| Weight | 260 g (9.17 oz), with PB-21 |
| Other features | DTMF keyboard. CTCSS/PL encoder. |
RECEIVER SECTION
| Receiver system | Double conversion superheterodyne 1st IF: 16.9 MHz 2nd IF: 455 KHz |
|---|---|
| Sensitivity | 0.25 uV (12 dB SINAD) |
| Selectivity | 12 KHz (-6 dB)28 KHz (-40 dB) |
| Image rejection | — |
| AF output power / speaker | 250 mW at 10% distortion / 8 ohm |
| External speaker connector | 2.5 mm |
TRANSMITTER SECTION
| RF output power | HighLow 1.25 m:1 W150 mW |
|---|---|
| 1.25 m | 1 W |
| Modulation system | Reactance |
| Max FM deviation (Factory set) | ±5 KHz |
| Spurious emissions | Better than -? dB |
| Microphone impedance / connector | ? ohm / 3-conductor (3.5 mm) |
| Microphone input level | — |
MISCELLANEOUS
| Manufactured | Japan, 1986-1987 (Discontinued) |
|---|---|
| Additional info | — |
| AJ-3 BC-2 BC-6 BH-3 BT-2 DC-21 EB-2 HMC-1 PB-21 PB-21H RA-9A SC-8 SC-8T SMC-30 | BNC adapter Wall charger for PB-21H 2-pack quick charger Belt hook Dry cell battery case (Six LR03 / AAA batteries) DC-DC converter for mobile use External battery case (Six LR14 / C batteries) Headset with VOX NiCd battery pack. 180 mAh NiCd battery pack. 500 mAh StubbyDuk antenna Soft case with belt hook Soft case with belt hook Speaker-microphone |
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