UHF Repeater - Low Power

The versatile TKR-851 is ready for deployment as 16-user group conventional repeater, a simplex or full-duplex base station, or as the RF core of a trunking system. Advanced features such as DSP audio processing, 5-tone/DTMF over-the-air remote control and programmable auxiliary I/O's combined with round-the-clock reliability add up to a superlative performing unit.

Supplied With

D.C. CableYes, 4m long
FootYes, 4 pcs
Front GlassYes
FuseYes, 10A
Hardware FixtureYes
Instruction ManualYes, English, Spanish, French, Italian, German & Dutch
Screw SetYes

PMR Construction Features

Accessory Features

Current drainStandby (Power Save): 0.3 A
Receive: 1.2 A
Transmit/Receive: ≤ 8 A

Applicable Standards

Technical Specifications

Frequency Range - E Type440-470 MHz
Frequency Range - E3 Type400-430 MHz
Number of Channels16
Channel SpacingWide: 25 kHz
Mid: 20 kHz (only "E Type")
Narrow: 12.5 kHz
5-Tone StandardEEA, ZVEI, CCIR, ZVEI-2, EIA, Kenwood proprietary
Antenna Impedance - 50 OhmYes
Antenna ConnectorRX: BNC TX: N
CW IDVariable speed/tone frequency/modulation
CW Message8 x 32 characters max.
Duty CycleReceive: 100%
Transmit: 100%
Frequency Stability± 1.5 ppm (-30 °C to + 60 °C)
Operating ModesFM
Operating Temperature Range-30 °C to + 60 °C
Operating Voltage13.2 V DC ± 15% Negative Ground
PLL Channel Steps5.0 kHz/6.25 kHz
Repeater Hold TimeFrom "Off" to 10 seconds
Test ToneVariable modulation/frequency
Dimensions483 x 88 x 340 mm
Weight (net)9.7 kg

Receiver Specifications

Adjacent Channel Selectivity83 dB at 25 kHz
80 dB at 20 kHz (only "E Type")
75 dB at 12.5 kHz
Audio Output4 W with less than 5% distortion
Circuitry - Double Conversion SuperheterodyneYes
Intermodulation72 dB
Sensitivity - EN 20 dB SINAD0.45 µV
Spurious Reponse Rejection (Analogue)90 dB

Transmitter Specifications

RF Power Output1 W to 25 W
Microphone Impedance600 Ohm
Modulation DistortionLess than 3%
Modulation Limiting± 5 kHz at 25 kHz
± 4 kHz at 20 kHz (only "E Type")
± 2.5 kHz at 12.5 kHz
Spurious Emission (EN)-36 dBm ≤ 1 GHz
-30 dBm > 1 GHz