![R J - 4 5 P l u g](/images/new-backgrounds/149652/1496523x1.webp)
R J - 4 5 P l u g
G r a y
O r a n g e
( R e a r V ie w )
1
B la c k
R e d
2
1
3
8
7
4
8 - P in P lu g ( R e a r V ie w )
8 | 5 | 6 |
|
G r e e n
Y e ll o w
B lu e
B r o w n
M ic A d a p te r R a d i o In te r f a c e C a b le - W ire d s tr a i g h t - th r o u g h ( p in 1 to p i n 1 , e tc . )
Mic Connector: The next step is to determine for certain the function of each pin on the mic connector. If your radio has a round
To minimize the possibility of making a wiring mistake, we have provided a wiring table for you to complete in the Jumper Wire Diagram. As the correct signal is determined for each microphone pin, you should record it in the table. You might want to use a pencil for this process, in case you need to make a change or use the table for a different radio later.
If your radio uses the
If your radio uses an
The best way to insure you have the correct wiring order is to verify with a multimeter where the Ground and PTT pins actually are on the connector. Because the
Start the identification process by checking for continuity between the radios chassis and the connector pin number that is listed as Chassis Ground in your radio manual. For example: If the manual says that Pin #3 is Ground, then check continuity between the radio chassis and the third pin (Pin #3) on the round connector. When making this measurement, remember that you are looking for “Zero Ohms”. There will no doubt be some amount of continuity between several other pins, but remember that the one you are testing for is a “short” to ground! If you don’t find continuity on the pin that you tested, then the pin numbers must be reversed in the radio manual. You can verify this by testing the third pin from the other end (in our example Pin #6). You should find continuity on that pin if the order is in fact reversed.
If you would like to up your confidence even further, you can turn your radio ON and test the PTT line. Your radio should be attached to an antenna or dummy load for this test, since you will be transmitting briefly. In this test you will be manually keying the transmitter by briefly shorting the PTT line to Ground. If one is available, use a small value resistor (a few hundred ohms) to short the PTT line to Chassis Ground (chassis - not the ground pin). The resistor is not really necessary, but a good idea just in case you are shorting the wrong pin! If the radio transmits, you can be absolutely certain that you have the pin numbering correct.
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