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IMARK   5208R-AC- Repeater


5208R-AC Repeater in 19" 3RU Equipment Cabinet for installation at Repeater Sites

Imark Stock # 930116


  • 3RU Cabinet
  • Power Supply with Battery Backup Facility
  • Two Kyodo KG108 or KG208 Transceivers
  • Can be configured as a Transponder
  • Full Local Control



The Imark 5208R has been specifically designed to provide a low cost versatile repeater or transponder using two 25-Watt mobile radios. It is a self-contained unit incorporating transceivers, power supply, and interface module and only requires the addition of a diplexer, an antenna and feeder cable to be operational.

The Power Supply Module incorporates an AC Mains SM Power Supply with battery back-up facility and automatic changeover facility. The 5208R can be supplied without the Power Supply as an option at reduced cost for installation at solar powered equipment sites.

The 5208R includes two Kyodo KG108 or KG208 25 Watt mobile transceivers and an audio interface/switching module. The Kyodo KG108/208 transceivers are available for any FM frequency between 66 MHz and 520 MHz, have channel capacities of up to 200 channels, and include CTCSS encoders and decoders that can be programmed for different CTCSS tones on a per channel basis. The RF Power output can be set anywhere between 1 and 25 watts with two fixed outputs being available on a per channel basis. Thus, the transceivers can be pre-programmed with all likely repeater channels, so that the 5208R can be deployed immediately without wasting time to program the transceivers. The Audio Interface/Switching Unit is included to provide the correct audio levels between the two transceivers.

The 5208R cabinet is designed for 19" rack mounting and is 3RU in height. The cabinet features all steel construction and is fitted with handles to assist with maneuverability and with site location.

The Imark 5208R-AC Repeater is normally supplied with the Power Supply, Transceivers for the required frequency band, and the necessary Interface/switching module.



General Details
Number of Channels Up to 200
Channel Spacing 12.5KHz, 20KHz, 25KHz, or 30KHz (5/6.25/10/12.5 KHz PLL steps)
Operation Mode Repeater or Cross Band Translator
Antenna Impedance 50W Unbalanced
Current Consumption ?? mA (Standby), ?? Amps (Repeat Mode), ?? Amps (Transpond Mode) @ 12 Volts DC
RF Power Output Two settings between 1 and 25 Watts on a per Channel basis
Maximum Frequency Deviation Wide band: ▒ 5 KHz, Narrow Band: ▒ 2.5 KHz, Channel Selectable
Frequency Stability Wide Band: ▒ 0.0005%, Narrow band: ▒ 0.0003%
Frequency Response Within +1, -3dB of 6dB/Octave pre-emphasis from 0.3 to 3.0KHz, 1 KHz reference
Signal To Noise Ratio Wide Band: More than 50dB at 1 KHz 70% Modulation

Narrow Band: More than 45dB at 1 KHz 70% Modulation

Modulation Distortion Less than 3% at 1 KHz 70% Modulation
Spurious and Harmonics More than 70dB below rated power
Intermediate Frequencies 1st IF: 48.5 MHz, 2nd IF: 455 KHz
Frequency Stability Wide Band: ▒ 0.0005%, Narrow band: ▒ 0.0003%
Sensitivity Less than 0.4ÁV for 20 dB noise quieting

Less than 0.3ÁV for 12 dB SINAD

Squelch Sensitivity Less than 0.25ÁV
Selectivity More than 70dB at ▒ 25 KHz
Blocking More than 90 dB
Intermodulation More than 70 dB
Spurious Response More than 70 dB
AF Response Within +1, -3dB of 6dB/Octave de-emphasis from 0.3 to 3.0 KHz, 1 KHz reference
AF Distortion Less than 5% at 1 KHz 70% modulation
Signal to Noise Ratio Wide band: More than 50dB at 1 KHz 70% modulation

Narrow Band: More than 45dB at 1 KHz 70% modulation

Power Supply Module
AC Input Voltage 240▒ 20% Volts AC 48 - 62 Hz. (Others available upon request)
Output Voltage 13.65 Volt DC
Power Supply Current 10 Amps at 13.65▒ 2% Volts DC
Over Voltage Protection 14.5 - 16.5 Volts
Over Current Protection 10.55A ▒ 0.45 Amps
Low Voltage Battery Release 9.8 Volts - 10.6 Volts
Unit Dimensions 483 (W) x 343 (D) x 132 (H) mm (excluding protrusions)
Shipping Dimensions 570 (W) x 540 (D) x 315 (H) mm
5208R-AC Weight: ??? Kg's
Shipping Weight: 11.0 Kg's
Inclusions Operators Manual, AC Cable, Transceivers, Power Supply
Options Automatic Identification Module, Lightning Protection, Transient Barrier, Back-Up Batteries


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