Hi All, Hope you had a good Christmas, and looking forward to the New Year.
Anyway my question. I have a RLC-MOT installed in my Mitrek 10mtr RX, and have also fitted a optocouple to isolate the radio from the controller (RLC-2A) I have used the circuit from the Mitrek pages in Repeater-Builder which includes a NPN transistor to switch the + output from the RLC-MOT, to a low on the controller. However the problem I have is that when it is connected using a 3.3K or 4.7K resistor in series on the base it does not work, it keeps it low (RLC-MOT) and I get no switching. Take the wire off the base resistor and I have 6v on the output of the RLC-MOT. Now I have got it to work by putting a 1N914 diode before the base resistor, but I only have 2v on the line from the RLC-MOT, which I think is strange??? So now I have the following. Pin 4 (earth) and pin 5 of the optocoupler are the COR from controller. Pin 1 anode of opto. This has a 1.2k to 12v Pin 2 cathode of opto. This is connected to the collector of the 2N2222 Emiter is connected to earth or ground Base is connected to the 5v output of the RLC-MOT through a 1N914 diode and a 3.3k resistor. And that is it. This is taken from page 31 of Mike Morries's information sheet on "Interfacing the Motorola Mitrek Mobile Radio to a Repeater Controller" (A very well written and helpful guide - Highly recommended) Any assistance would be gratefully received, if not I will go with what I have. Regards Kevin. Get Skype and call me for free.
sparc_nz
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