wireless transmitter/mic problem

[Fisher]

I'm having a problem with my wireless transmitter and my shotgun mic. Both are brand new so I doubt the problem could be wear. The shotgun is a Beyerdynamic 86SII and the wireless system is a Lectrosonics UH 400A transmitter and a UCR401 receiver.

The mic makes a crackling noise when you touch the transmitter or move the mic. I dont have this problem when the transmitter is connected to an RE50 stick mic... only the shotgun.

I adjusted the the phantom power on the cube to 5V which seemed to help some. I am using phantom power in the cube to power the mic. There is a AA in the mic but the power is off.

Any ideas? I'm at the end of my rope.

Charles Fisher
General Assignments Photojournalist
KTRK-TV

 

[Dan R.]

I had this problem with my Sennheiser and it turned out to be corrosion on the battery terminals. I had to take the battery out and scrape the contacts. Batteries were new, but a previous set corroded the terminals just enough to cause problems. With mine you didn't even have to touch the transmitter and it would intermittently do it.

 

[Necktie Boy]

Sounds like there might be a grounding problem with the Beyer. How does the Beyer work with a cable? Same problem? Or works fine. On my old ME 80, I have to have the switch on to have work.

 

[The Daywood]

I had a problem on my Sennheiser with a Lectro cube, and it was just that it wasn't a tight enough fit... There was just enough play between the mic and the cube to make a difference, and actually, the play ended up being in the mic...The mounting for the XLR terminal on the mic was loose...

You're saying both are brand new, but every once in a while, things come out of the factory just a bit below tolerances...Worth a check...

 

[sunshinetv]

I had the same problem with a Sennheiser and the same transmitter, turned out to be a bad ground in the mic.