Had the same problem. Check the ground (earth) is attached properly to the mic. This will cause the signal to be interrupted and can also cause a phasing problem. A lot of techs don't check that when you send them for repair
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It has dust or oxide inside. Go to Radio Shack and pick up a can of "Tuner Cleaner" or "Contact Cleaner". Using the tube that comes with the can, spray the switch liberally, trying to get some of the spray down inside the switch. While still dripping wet, work the switch back & forth several times. Let it dry out & use it.
If that's not enough... the mike will need to be opened up to gain better access inside the switch with your spray. No need to unsolder anything, you just need to get that spray inside the switch.
Don't use anything except "tuner cleaner" or "contact cleaner" for the purpose. Don't use WD40, don't use silicone spray, don't experiment. Let's get your mike working... and only tuner cleaner or contact cleaner is known to do that.
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
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.
If the mic is a condensor you would need to have phantom power, or it will not work. Use a small mixer or externat power supply. We here at Pro Line Music Have small mixers that have phantom power. 215-736-8055
A common problem that SOME have is due to the foam windscreen inside the metal screen rubbing the diaphram of the mic.
Unscfew the dome screen and make sure the foam is out agaist the scree everywhere.
If the dome has become dented, this is my cure: Temporarily remove the foam sheet inside the dome. Put the dome over the handle of a Crescent wrench (has about the right contour). Pound on the screen with a RUBBER mallet, rotating the screen as it reforms! Good as new! Replace the foam sheet and reassemble!