Question about Shure SM58 Professional Microphone

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Small volatage at mic and pin 2 cable becomes open

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If you don't have continuity of around 300 ohms or so between pins 2 and 3 there is either broken wiring within or the dynamic mic module is bad and requires replacement.

Posted on Apr 28, 2010

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Replaced starter on a trex R/V on a 1999 chevy c3500hd chassi. with a 6.5l disel engine. forgot how to wire in the new starter. I have 2 heavy duty cables 2 small cables with rings and 1 small cable with...


I presume that the big battery cable is a no brainer, and kindly reference that terminal as 12:00 position.
With respect to the small cables, if you have become confused, ONE of them will become live when key is turned to the start position. That small cable goes to the 2:00 position. The other small wire(s) go to the small terminal at approx 10:00 position.
The function of the other small wires is to provide more power to the ignition, during starting, by bypassing the resistor.
Doc

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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

Countryman mic getting a noise like a white noise generator sounds but it comes and goes. What can I do about it?


Serious crackle or noise is a different problem, but a lesser, rustling crackle is very common with these mics. If you aren't looping the cable close to the mic, you will run into issues.

What you have to do, is put a small, 1/2' loop in the cable, making sure that the looped part of the cable is touching the initial part of the cable. Affix them so they stay that way throughout your performance/production. The closer you get the loop to the mic, the better.

As a test, take the mic, hook it up to equipment and listen on headphones. Start handling the mic, mainly by rubbing the cable, or rub the cable with various fabrics, listening for the rustle. Then put the loop in it and do the same thing. It is amazing how much more quiet it becomes. Try it with the loop half way down the cable and handle the cable above and below the loop. you can hear the rustling above the loop, but not below.

This model HAS to have that loop for quiet audio.

May 30, 2010 | Countryman E6 Ear Professional Microphone

1 Answer

Properly connecting the mic cable to the pins. my mic is currently in a state of repair due to the absence of the original cable.


For low impedance A3F/A3M, two wires with Shield
Pin 1 is ground/shield
Pin 2 is hot or +
Pin 3 is cold or -

For high impedance A3F/A3M, one wire with Shield
Pin 1 is ground/shield
Pin 2 is hot
Pin 3 is not used.

Feb 21, 2010 | Audio Players & Recorders

1 Answer

I would like the color breakdown on the wiring diagram


colors are on the bike side of the connector are spelled out in the shop manual, however they do not include what is used for the headset side of the connector. These are the three pin numbers on the connector that appear to be the ones for the microphone portion. Hope it helps. For the whole setup the passenger uses 5 pins and a tab; while the driver uses all 7 pins plus a tab. So, on a HD three wires will not correctly interface with the system.

pin 4 =BK = MIC Common
pin 2 = passenger gy/bk & Drain = MIC Shield
pin 2 = front y/bk & Drain = MIC Shield
pin 1 = red = MIC

Jul 19, 2009 | 2008 Harley Davidson FLHX Street Glide

3 Answers

Where can i get my shure beta 58 repaired? I live in Redditch in the UK.


Hi,

The easiest way to find a service agent near you for your microphone is to contact Shure at the following;

All service and repair issues for Shure, QSC, Phonic, Sound Devices and Radial products are handled directly by Shure Distribution UK. Please contact them at the following for information on service and repair issues:

Shure Distribution UK
Unit 2
The I.O. Centre
Lea Road
Waltham Abbey
EN91AS

Phone: 44(0) 1992 703058
Fax: 44(0) 1992 703057
email service@shuredistribution.co.uk

Hope this helps. Please remember to rate my answer.
Many Thanks

Jul 13, 2009 | Shure Beta 58A Professional Microphone

1 Answer

Road king 56 4 pin mic


take a wire or small screw driver across any two pins you are looking for a earth from tx to tx the last pin is mic. on mic side use a multimeter earth is braid, find rx lead next . key mic multimeter shows 0 tx. audio has a higher value .

Apr 08, 2009 | Magnum DeltaForce CB Radio

1 Answer

Problem with cable staying solidly connected to the microphone


If your cable has no spring pin, it is likely not to stay connected. If you notice on your mic cable, there is a hole as follows.

       \/
   o      o

       o

The arrow is where the whole is on the outside of the mic. This is where the pin on the cable clicks firmly into place. If your cable doesn't have a small pin, then it is time to find a new cable. 

Feb 03, 2009 | Shure SM58 Professional Microphone

5 Answers

Shure beta 58


Benimur, you are correct, except that the Beta 58 is a condenser mic that required phantom power. In that case all 3 lines are used. Included below are the connections.

Dan

Sep 11, 2008 | Shure Beta 58A Professional Microphone

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