CB MIcrophone RewireJob. A Diesel Model 360-100 to cobra's
Hi, I need a synopsys for wiring a Diesel Microphone model 360-100 ,5 wire microphone to Cobra/Galaxy 4- pin radio hookup. Wiring on the Mic is 1-yellow, 2-black, 3-white, 4-black, 5-red. What goes on Cobra/Galaxy #1, #2, #3, #4 ? I'm LOST.
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First, you have to replace the cable as you will need a minimum of 4 wires, 2 of them for the transmit and receive switching, and a shielded cable for the audio. It would be nice to have another as the common for the TX/RX switching but the shield is commonly used for this.
You will need to re-wire the switch in the candlestick to allow switching from RX to TX.
Google "D104 to cobra 29 mic wiring" and you will find many hits for this.
Your microphone was not intended to work with this style of radio. To save a buck, the CB manufacturers removed a 50 cent relay to do the transmit/receive switching. You can see what happens when you remove the microphone when you are listening to the Cobra. It'll stop producing any sound. This won't happen with the Tram,
Also, you may have problems with the microphone as it is high impedance as indicated by no transformer or preamp in the base of the microphone. This may be a problem as the Cobra has a relatively low impedance input.
The simplest way is to order a microphone adapter from ebay or a reputable CB shop. I have all my mics wired for standard 4 pin cobra. The standard 4 pin cobra is the most common and if you keep adapters handy then you can use all different kinds of mics on different radios.
The symptom sounds like a bad Microphone connection or a bad microphone!! The Cobra has a built in circuit that wont allow you to hear anyone until the microphone is plugged in and the no transmit part will also do the same. Try another microphone that is wired right for that radio before you do anything else!! let me know!!
According to the astatic wiring hand book it is not used. I would leave it terminated but long enough that if you find your having noise when you receive you could still ground it. I'm pretty sure you don't need it.