146.28 - 146.88 Repeater
Map of 88 coverage

Photos by Joe Iverson (KD5KKZ)

    These pictures are the heart of the 146.88 repeater located on the 59th floor of
the CityPlex building at 81st and south Lewis in Tulsa, OK.
The image on the left is the face of the repeater rack and from top to bottom -
receiver voting board, ACC controller, ACC DVR, Spectrum transmitter,
Pyramid power supply, Henry amplifier and finally the Motorola Micor
local receiver.
The right image is the back side of the rack beginning at top with the 3 UHF
Motorola Micor receivers, receiver voting board, ACC controller and
the ACC DVR.

Merlin Griffin (WB5OSM) 146.88 site chairman:

The 146.88 repeater consists of:

Receivers:
On the channel 6 tower 3 miles north of Sand Springs - a Motorola Maxtrac receiving on 146.28 MHz feeding a Motorola Radius UHF link transmitter.  An 88.5 Hz PL tone needed to activate it.

On top the Mid Continent building in downtown Tulsa - a Motorola Maxtrac receiving on 146.28 MHz feeding a Motorola Radius UHF link transmitter. An 88.5 Hz PL tone needed to activate it.

At Liberty Fire Department 201st near Delaware Avenue - a Motorola Maxtrac receiving on 146.28 MHz feeding a Motorola Radius UHF link transmitter. An 88.5 Hz PL tone needed to activate it.  This unit is located on a 75 foot tower.

At City-Plex at 81st & South Lewis - a ????receiver is receiving on 146.28 MHz.
(141.3Hz PL tone needed to activate it)

There are three UHF Motorola Radius units monitoring the UHF link frequencies.


Controller:
These receivers are all fed into a Hall Electronics voter card then to an ACC RC-96 repeater controller, attached to it is an ACC digital voice recorder (DVR).

Transmitter:
The transmitter is a 10 watt Spectrum feeding a 120 watt Henry Radio amplifier.

The output of the amplifier is feed into a set of four Wacomm 8" cavity duplexer then to the Hustler G6 antenna on the roof of the CityPlex Building.