Eighth in microphone jack/wire bad

The Galaxy 73V is a CB radio that has a microphone with a four-pin connector. Here are the steps to check the microphone wiring:

1. Check the microphone cable: Make sure the cable is not damaged or broken. If the cable is damaged, replace it with a new one.
2. Check the microphone pins: Check if the pins on the microphone connector are clean and straight. If they are dirty or bent, clean them or straighten them out.
3. Check the microphone wiring: Use a multimeter to check the continuity of the microphone wiring. To do this, set the multimeter to the continuity mode and touch the probes to each of the four pins on the microphone connector. You should hear a beep sound indicating that there is continuity.
4. Check the wiring connections inside the radio: Open up the radio and check if the microphone wiring is connected properly. The wiring should be connected to the correct pins on the microphone jack and soldered securely.
5. Check the audio circuit: If the wiring is properly connected and there is still low sound, the issue may be with the audio circuit of the radio. In this case, it is best to take the radio to a professional technician for repair.

It is important to note that modifying or tampering with a CB radio is *******, and can result in fines and penalties. If you are not familiar with CB radio repair, it is best to seek the assistance of a professional technician.

On microphone input of your soundcard if it is not there then sorry you need a tiny amp as the other inputs are all at line level

Mic plug has been replaced (new lav mic) so that leaves the mic jack connected to the body transmitter. Corrosion is a possibility...

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but I think it's something to do with the mic jack on the transmitter. Some units solder these connectors directly to the internal PC board and after a while, the solder connections break. Have a tech open it up and closely inspect the input jack's solder pads.

email the company you purchased from

There could be a number of reasons for this problem you will need to work through them from one end of the system to the other to diagnose.
Start with a bit you know is working.

1. Look at the receiver unit first. Do the indicator lights come on when you switch the microphone on? If yes hold the microphone belt pack about a couple of feet from the receiver and move it from one side to the other. Do the lights flicker? If it is a 2 channel (dual diversity) model -do the A and B channel lights flash on and off to indicate that the receiver is switching channels? If they do the problem is unlikely to be the microphone or belt pack.
2. Is your amplifier/ computer/ audio system producing sound from other sources (e.g. radio etc)?
3. Unplug the output lead from the back of the receiver and plug a cabled microphone or other sound source / instrument to it to test the cable.
4. It may be some sort of external interference. Most of these sort of microphones can be switched to different frequencies. Try changing frequency (usually a little rotary switch on the back of the receiver and inside the battery pack - will often need a small flat bladed screwdriver to operate it) and make sure that there is a clear line of sight between receiver and transmitter units with no large lumps of metal or electrical devices in between.
5. Do not use re-chargeable batteries as they almost never achieve an adequate voltage. Always use Duracell Ultra or equivalent.
6. The capsules and cables of lavalier / lapel microphones are very prone to failure. Try removing the microphone jack lead and plugging in a different one . If you don't have another microphone try a simple audio lead - maybe a mini jack-plug to standard 6mm jack and connect an electric guitar or other sound source (or just touch the bare plug contacts at the other end of the lead to see if it creates a sound) . Does it work? If it does then it is possibly the microphone itself rather than the belt pack. These microphone capsules are not repairable and mending the cables / jack plugs can prove very fiddly, (lost are moulded units and cannot be dismantled anyway) however replacement microphone capsules are not very expensive (about £16-£20 in the UK) but before you replace it see steps 7, 10 and 11 below because it could just be a problem with the jack socket on the belt-pack
7. Look at the jack socket itself. These often attach to the case of the belt-pack with a threaded ring that screws onto the socket unit. Sometimes the screw ring can work ever so slightly loose - which means that the jack plug doesn't quite go far enough into the socket to make a proper electrical contact (we had exactly this problem with a different brand of lapel microphone).
8. If the tests at no 6 don't find the problem examine the wire aerial on the belt pack carefully. Sometimes the central core of the aerial can get cracked by frequent bending (usually when people stuff the belt pack in their pocket). Try twisting the wire backwards and forwards gently. Work all the way along it's length - does this make the unit work -albeit intermittently?
9. Dismantle the belt pack to check that the aerial wire has not got broken off the circuit board.
10. While you are in there check that the wires to the microphone jack socket have not got broken off or stretched so that the screen and core are shorting out.
11. Put a battery in the belt-pack and try touching the contacts on the microphone input jack socket with a small screwdriver or other metal object - does this produce any sounds? If so it may be that the contacts inside the socket are bent and therefore not touching the pin of the jack-plug. Some careful re-bending with a thin probe may solve the problem.
12. If you have got this far you can be fairly certain the fault like in the microphone capsule because you have eliminated every other possibility

If you do not have experience in repairing these mics, you should probably have a pro audio technician do the work. The problem is an open circuit in microphone's internal wiring; either the mic cartridge is dead, or one or more of the fine wires connecting it to the microphone output connector are disconnected. Sometimes the fault is caused by a bad solder connection, or a faulty switch. As I mentioned, unless you have experience with these items, you can permanently damage a potentially salvageable mic. A goos tech should be able to identify the problem in a few minutes, and if the mic is repairable, it should be a cheap fix. Worst case scenario, a dead cartridge replacement may cost half the price of a new mic. But then, it's essentially a new mic.

Open Control Panel double click on the sound icon click on the recording tab find your mic or headset double click on it find the levels tab and you should be able to adjust your mic.

First, try another mic on the radio to be sure it's the mic and not the radio causing the problem. If it's the mic, check the wiring circuits for a bad switch or broken wire. Simply...the TX circuit is closed and the RX is open when the key is squeezed. The RX circuit is closed and the TX circuit is open when the key is released. Use a simple ohm meter to check for resistance between the pins on the mic (after removal from the radio of course). Open circuit will read 1, closed circuit should be very close to zero. You'll probably find the TX circuit never closes when the key is squeezed. Could be a broken wire or faulty switch in the handset.
Also check...If the mic "keys up"...you see the meter move normally, but no voice...it's either a faulty mic element (the little round thing you talk into) or the audio circuit of the radio has a defective component which a good CB shop can replace.

This is probably interference in the wireless connection for the lavalier mic.
Try switching channels to find a clear one!
Or switch to a wired lav mic if that's practical.

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The User Guide can be found on the Shure website.