K8SN coverage map
(click for larger image)
Owner: Sam Nabkey - K8SN
Frequency: 442.175 TX / 447.175 RX
CTCSS: 103.5 TX & RX
Location: Approximately 16 miles South of Grand Rapids
Controller: FF-Systems Inc. FF-800 with FF-CAD 500ms Audio Delay Board and companion FF-8070 Digital Voice Recorder System.
Receiver: Tactel TAC310SX on 447.175 Mhz (103.5Hz CTCSS). Also on each Link channel from the remotes
Exciter/Amplifier: Exciter: Motorola Mitrek, Amplifier: Glenayre UHF 300W ex-paging amplifier.
Power Output: 100watts
Power Supply: 25A Newmar switching power supply. The Glenayre amp has it's own power supply.
Duplexer: Main Receiver is connected to a 445-449 Mhz Multi-Coupler consisting of a DCI 8 Pole pass filter and a DB Products 4 port amp/splitter. - Transmitter is combined with others.
Antenna: RX 16 Bay UHF Folded Dipole at 525' TX is a 3db Fiberglass at 490'
Remote base: Doug Hall Electronics RB-1, Kenwood TM-241A, Two Bay folded Dipole at 190', DCI and PAR Electronics Filters to eliminate Intermod.
IRLP: IRLP NODE #4168
Other Info: Doug Hall Electronics 4RV System 8 Channels
Remote receiver electronics and other misc. facts: Remote sites are Motorola Mitreks Listening on 447.175Mhz and retransmitting on one of the link channels back to the Moline Site. These site average about 1 to 5 W output into either a 6 or 11 elment Beams. Duplexed from the Remote Base Antenna at 190' into a cell wave shape factor filter - Passing a "band" of channels and rejecting the Transmitter. Allows for lower power link-back tranmitters at the remote sites. The above are fed into a TX/RX Preamp fed to a 8 Port Splitter.