TH-21A
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GENERAL
| Type | Amateur VHF transceiver |
|---|---|
| Frequency range | USA TX: 144-148 MHz RX: 144-148 MHz |
| Tuning steps | 5 / 10 / 100 KHz, 1 MHz |
| Frequency stability | ±? ppm |
| Mode | FM |
| Channels / memory management | None |
| Repeater shift / offset | ±600 KHz |
| Power supply | 7.2 VDC (Battery pack)or 5.8-10 VDC external |
| Current drain / power consumption | RX: 28 mA (Squelched)TX: 300 to 600 mA |
| Antenna impedance / connector | 50 ohm / Threaded phono |
| Dimensions (W*H*D) | 57*120*28 mm (2.24*4.72*1.1") |
| Weight | 290 g (10.23 oz), with antenna and PB-21 |
| Other features | — |
RECEIVER SECTION
| Receiver system | Double conversion superheterodyne 1st IF: 16.3 MHz 2nd IF: 455 KHz |
|---|---|
| Sensitivity | 0.5 uV (28 dB S/N) |
| 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 | — |
TRANSMITTER SECTION
| RF output power | HighLow 2 m:1 W150 mW |
|---|---|
| 2 m | 1 W |
| Modulation system | Reactance modulation |
| Max FM deviation (Factory set) | ±5 KHz |
| Spurious emissions | Better than -60 dB |
| Microphone impedance / connector | ? ohm / ?-pin |
| Microphone input level | — |
MISCELLANEOUS
| Manufactured | 1984-198x (Discontinued) |
|---|---|
| Additional info | — |
| AJ-3 BC-6 BT-2 DC-21 EB-2 HMC-1 HS-8 PB-21 PB-21H SC-8 SMC-30 | Antenna adapter (Twist lock to BNC) Quick battery charger Dry cell battery case (Six LR03 / AAA batteries) DC-DC power supply (For mobile operation) External battery case (Six LR14 / C batteries) Headset with VOX Earphone Standard NiCd battery pack Heavy duty NiCd battery pack Soft carrying case Speaker-microphone |
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