Interfacing external repeater controllers to the Motorola MSF5000 repeater.
The MSF5000 CLB series Analog stations require a 2736A EPROM chip to be burned. The key to making this all work is in the programming.
There are several articles on interfacing controllers to the MSF5000, and
several of those articles state they use external PL decoders because
I'm not going to bore you with why this and how much that and use this formula combined with that test to produce whatever..
Here's what really works:
Program your chip, or have it programmed with your TX and RX frequencies,
and whatever PL tone you wish decoded (received by the station)
Repeater Controllers and Tone Panels require basic input and output
signals. You need a Ground (GND), Transmit PTT (PTT), Received Audio
Flip up the MSF5000's control deck and you can obtain all the signals from the following locations:
GND - J800, pin 10 (not always required if powering from the station's
On a more technical note, PTT occurs when TP9 is grounded. RX IN is
strong at J800 pin 39, you may need to attenuate it with a resistor.
Here is the wired control tray, ready to go back on the station.
For the installation pictured above, I used CAT5 cable and wound the
leftover wires back around the wires to
For this particular build, I mounted the controller in an MSF5000
expansion tray and fitted it to the top of the
I hope this helps, and shows you how you really can get an MSF5000 to
decode PL / DPL in the cabinet with