From the top of the unit we have a 120VAC power strip
for AC power inside the cabinet. Next is a 4-Cavity set of UHF
Duplexers mounted above the 443.975MHz Repeater. The repeater
is a GE Mastr Exec Mobile conversion with a ICS Controller. The
Mastr Exec is a 40 watt unit running 30 watts. Conversion was
performed by Henry Hamblin of Hamblin Communications of Corbin,
Ky. |
The Double-Blade Knife Switch controlls both the DC
Power Supply and the Battery Back Up. Our normal power supply
is a 208VAC Input with a 13.8VDC/50A Output. To provide un-interrupted
Repeater service during power outages, there are two 6VDC/200AH
Batteries in place behind the Knife Switch Panel. |
Just below the Knife Switch Panel is home to the 147.030MHz
Repeater. First we have a SCOM 7K Controller mounted over the
Motorola Mitrek Mobile Conversion. The Mitrek is a 110 watt unit
running at 45 watts. The tan box houses the volume, squelch controls,
PTT disable switch, local speaker, and cooling fans for the Repeater.
Below is a set of 4-Cavity Wacom Duplexers. |
In the bottom of the cabinet we have the main power
supply unit. The power supply is 13.8VDC at 50 Amps supplied
by 208VAC. The power supply also maintains a constant charge
on the back-up batteries. With this set-up, should there be an
outage in AC power, the batteries will provide un-interrupted
13.8VDC to the repeaters. The batteries will power the repeaters
for a period of 12 hours of constant transmit time or 48 hours
of normal repeater use. |
