N8IG Repeater

The N8IG Repeater system is a Kenwood NXR-710K Repeater setup in Analog Mode. The repeater was purchased by the Union County EMA and put into service on March 10, 2019.

The old repeater is GE MASTR II Repeater donated by Honda Americas to the Union County EMA. It has served the amateur radio operators of Union County well over the years. It was taken out of service when the Kenwood repeater was put online.  

The transmitter is limited to 80 Watts ERP from a Decibel Products 4 bay folded dipole at 96' atop our tower at the County Offices building. 
There are multiple GE MASTR UHF receiver bays for link receivers. The Repeater and all UHF Link receivers, Voter, and Controller are co-located there.

The controller, voter, and the GE MASTR UHF receivers still need to be setup on the Kenwood Repeater. We hope to accomplish that in the coming weeks. The information below will be updated after that is completed.

The (new 11/2014) primary link receiver is now a Kenwood TM-V-7A crossband radio fed by a 7 dBd Hustler G7-144 receive antenna 175' AGL on top of a centrally located water tower which feeds an Advanced Receiver Research (Ar²) P144VDG 0.5 dB low noise pre-amplifier about 50' below the antenna.  A mobile VHF duplexer provides VHF front end selectivity from a 3.4 kW FM Broadcast site just three miles away.  The signal is fed via another 230' of RF-400  (0.4") cable to the ground mounted cross-band radio.  The signal is UHF linked back to the main Repeater/transmitter site via the same VHF/UHF signal combiner/splitters and 230' + a separate 50' of RF-400 cable (= ~9 dB total loss @ UHF) to the horizontal UHF 5 element Yagi aimed south.  This central and high VHF receive site and low noise VHF amplifier (with enough gain to overcome the small cable's signal losses) gives complete Union County coverage for mobiles and ~90% coverage for handhelds.  Additional coverage is planned for Remote receiver sites (e.g., Bellefontaine when repaired).  Mobile coverage into Marion, Urbana, Hilliard, Delaware and beyond have been consistently reported.

2 Meter Repeater Functions
Code Name
 26  Time Female
 27 Time Male
  29   Date
 3+(1-9)  Retrieve MEssage Position 1-9
 4   Check Mail
  4 * Record Mail
  4 ** Erase last Message
   4 *** Record and playback, useful for hearing yourself on the repeater
5 followed by keys Repeats Key pressed

Below are photos of the Kenwood N8IG repeater system.

Image: 
Repeater and Amplifier
Repeater Rack