Question about Shure ULX Professional Series - Handheld Wireless Microphone System (Frequency Set J1) ULXP24B87CJ1 Microphone

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Need to repair a radio mic - Shure ULX Professional Series - Handheld Wireless Microphone System (Frequency Set J1) ULXP24B87CJ1 Microphone

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Contact Shure for repairs.

Posted on Jul 27, 2014

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1 Answer

PC 78 elite, no modulation



Check tr 14 15 AND 16 AND DIODES D14 D13

Jun 10, 2013 | Uniden PC78ELITE 40-Channels Base CB Radio

2 Answers

Can transmit but not receive, same with or without mic, have tried different mic ...no dice ?


Your radio is in need of repair. Typically you can find flat rate repair for the CP200 style radio for around $85. You may have a bad speaker, or other internal issue.

Best regards.

Jul 14, 2012 | Motorola Mint Radius Cp200 Uhf 4ch Radio

1 Answer

I have new cobra ltd new antannas and mounts can hear but cant talk


You say antennas,I assume co-phased,as long as they were installed correctly&adjusted for the lowest swr reading,we'll assume they are ok.Next step would be the radio adjustments ,there is a switch next to your meter that must be set to s/rf,another switch for cb/pa needs to be on cb and last the knob for mic gain needs to be set at about halfway to three quarters depending your voice level and mic type used..are you using the stock mic that came with the radio,if so you should be able to transmit..look at the meter when you key the mic and talk it should move with your voice.If your using an aftermarket mic such as a power mic,make sure the battery is fresh and the correct type,this may also not be wired correctly for your radio if bought second hand..next step would be taking vehicle w/radio to a reputable cb repair shop or technician to evaluate.Good luck and hope everything works out.

Sep 05, 2011 | Cobra 29 LTD CB Radio

1 Answer

Audio is lost now and then on my bearcat 210xlt but every thing else works fine.


The most common cause for this problem is a broken wire in the mic cord. The mic switch is responsible for putting the radio in receive mode. If the TX wire is broken, then the radio will not go into receive mode. This usually happens because the mic cord is constantly moving around in the vehicle, and as well you are always pulling and tugging on the cord so you can talk in the mic. It happens.

if you have a spare mic, you can try it. If the receive works with another mic, then your stock mic needs repair, if you want to keep using it. Usually the wires break off at the solder joints at the plug, and is a quick fix with a soldering iron.

Or you can just use the other mic, or buy a new one.

Aug 14, 2011 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

I have a DX98VHP that sounds like the PA is staying keyed up when I unkey the radio. It makes noise on receive and meter showes about 8 s-units. When it does this I can turn the power off and it still...


Your mic has a series of contacts which cut off the speaker before you transmit and activate the transmitter. If the mic has screws holding it together. With the radio power off. Open the mic and check the spacing between the contacts if it is not enclosed. Some are sealed in a casing. You want to verify that the contacts are not sticking or too close together allowing other functions to stay on.

If you cannot check the contacts. Unplug the mic connector. Get a copy of the mic wire functions and use an Ohm meter to verify that the speaker leads disconnect when the mic button is keyed. It should read "0" when the mic button is pressed. If not, then there is a problem in the mic button switch and you will need a new mic.

Carefully inspect the mic cable for wear breaks. The wires inside are easily damaged when the shielding is damaged. Cables can be repaired. Be sure to slide on two to three shrink tubes to cover the repair job when done. Slide on the tubes and heat them one at a time to create a good protective shield for the wires. This involves several solder connections which will need a small shrink tube on each wire solder. Electrical tape can be used but it will end up a large bulge in the cable afterwords. This should be considered a temporary repair since the strength of the mic cable will be compromised. Stretching the cable afterwords can result in a wire break.

Next check the connector where the mic attaches to the radio, Often there are two small screws which can be removed so you can check the wire connections. A lose wire may be making contact with another contact when the mic is moved around allowing the speaker to stay on during transmit. A small lose strand of wire will account for the noise. After a lot of use the contacts in the plug can become lose if you frequently stretch the cord pulling on the connector. If it is the problem make a note of the wire positions. Then remove the leads with a solder iron. Be careful not to overheat the small metal post as the posts are seated in a plastic mold which can be damaged when overheated. Slip shrink tubing onto the mic cable. If the clamp was not very snug use more than one piece of shrink tubing. Cut off the bare ends and strip back about a 16th (just enough to solder back on). Re-solder the fresh wires to the pins. Over time the wires going into the solder weaken and break. Make sure there are no lose wire strands which could touch another pin. Slide down the shrink tube as far as possible and heat with a match or lighter. Re-attach the clamp so that it holds the cable snugly.

If the problem is not in the mic switch, cable or connections, you will need to take the radio to a technician.

You can also check for mic related problems by using a known good mic. However it should be for the same model radio. Pin numbers and configurations vary between radios, even the same brand of radio. Just because it fits the connector does not mean it will work properly and can even damage the radio.

Mar 01, 2011 | Galaxy Radios Microsystems DX98VHP CB...

1 Answer

Motorola cp200 attached microphone will send but will not recieve


Assuming you have the correct mic for the radio (HMN9030 or PMNN4013). It is possible
1) you have accidentally plugged the mic into the radio with the radio turned on, (this will cause the radio to receive but not transmit. It can simulate VOX.)
2) you have a bad audio accessory jack,
3) you do not have the mic plugged all the way in (you will feel a slight click when the mic is seated properly)
4) you have a bad mic or bad mic cord.

Possible solutions:
1) With the radio turned off, replug in your mic (feel for the click), then turn your radio on, and see if it works.
2) Try a known good mic from another unit.
3) If none of the above solve the problem, send your radio along with the mic to a repair facility and have the jack tested. (FYI: Flat rate repair on this style radio is currently around $85. Cord replacement on the mics can average $27 to $38.)


Feb 03, 2011 | Motorola CP200 Two Way Radio

1 Answer

I have to scream just to get heard


Two things to check:
1) Check to see if your mic hole or area might have something covering the mic or debris in the hole.
2) If your radio has separate setting for Narrowband and Wideband channel spacing, yours may be set differently than the others.

If neither of these are the issue, your radio may need repair or replacement, as you might have a bad mic.

Best regards.

May 03, 2010 | Chatterbox FRS X2 Communicator Two Way...

1 Answer

29 ltd classic wont transmit


Hi,
Great radio when it works.
If you have your settings on CB - not PA - -be sure that your Cobra has that setting selected.
If CB -is selected and still nothing - be sure you have a working mic. These wires are fragile and can break internally. One easy way to check is to borrow a cobra mic or even drop by a CB repair shop and ask them to do a mic check with the mic - it is free.

If you have a bad mic replace it and all should be well.
If your mic is good and it still doesn't transmit you will need to replace the finals in the unit. It is common that these burn out of you got too close to someone with too powerful a radio. The CB shop will need to look at it further and repairs should not be over about 40.00.

Good luck with your Cobra.

Mar 31, 2010 | Cobra 29 LTD CB Radio

2 Answers

Need a mic for a midland 79-892 SSB Radio or at least the 6 pin mic plug


Because the radio has controls for the clarifier on the mic, there is an extra wire to have the control in the mic. This is why the radio uses a six pin mic but it is an offset pin spacing. This is an extremely tough mic connector to find and the radio is getting pretty old.
I have on several radios strapped the RF gain and used this knob as the clarifier and installed a five pin mic connector in the radio and it's mate on the mic. Not a job for those who are not used to doing this! But the radio is worth the repair as it is a good one! Email me at.... poikaa@yahoo.com

Feb 12, 2010 | Midland Radio Communications

2 Answers

Cobra 148 gtl


First off check to see if your mic gain is turned all the way down. Second; if you have a power mic is the battery dead ir the volume of the mic turned down. If these check ok, look for a loose or broken audio wire in your microphone, and the connector (both ends can break). I have seen the wires break as far back as 4 inches from the mic head and the connector depending on how the user held the microphone, or pulled against the wire. if the problem is not found to be any of the above I suggest you take the radio to a qualified technician for repair.

Dec 11, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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