Source: rigpix
Transceivers
Updated: 09/02/2026
Kenwood TM-421ES
Confidence score: 50%
Estimated value
125€
Theoretical estimate
106€
Minimum
144€
Maximum
Specifications
GENERAL
- Type
- Amateur UHF transceiver
- Frequency range
- Europe TX: 430-440 MHz RX: 430-440 MHz
- Tuning steps
- 5 / 10 / 12.5 / 15 / 20 / 25 KHz
- Frequency stability
- ±10 ppm @-20 to +60°C (-4 to +14°F)
- Mode
- FM
- Channels / memory management
- 10 regular (0-9) of which #1 functions as priority channel 2 band edge search limits 2 odd repeater split RAM storage with lithium battery backup
- Repeater shift / offset
- Europe -1.6 and -7.6 MHz England ±1.6 MHz
- Power supply
- 13.8 VDC ±15%
- Current drain / power consumption
- RX: 400 mA (No signal) TX: Max 8.5 A
- Antenna impedance / connector
- 50 ohm / SO-239 (On pigtail)
- Dimensions (W*H*D)
- 141*42*193 mm (5.55*1.65*7.6")
- Weight
- 1.2 Kg (2.65 lb)
- Other features
- 1750 Hz repeater tone.
RECEIVER SECTION
- Receiver system
- Double conversion superheterodyne 1st IF: 21.6 MHz 2nd IF: 455 KHz
- Sensitivity
- 0.16 uV (12 dB SINAD)
- Selectivity
- 12 KHz (-6 dB), 26 KHz (-60 dB)
- AF output power / speaker
- 2 W at 5% distortion / 8 ohm
- External speaker connector
- 3.5 mm, 8 ohm
TRANSMITTER SECTION
- 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
- ? mV
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