Palomar SL41 microphone

Another stupid question, the one I had uses a AAA but schematic has power listed at 12 volts.

Which is it?

 

I have the same issue. I have one for my rci 2970n4 and a regular 4 pin one and they both squeal something horrible. I thought it was just me and something in my truck. No matter what radio I use them on. they squeal.

 

The radio a 2970n4 and the mike were purchased and tuned at the same time from Mark at Fine Tune. There is no talk back and to stop the squealing you need to turn the mike gain down to a 1/4 way open or 9 o'clock. As soon as I key the mike. the radios meter goes straight up and people tell me I am squealing. Stock mike and cheap mike all work fine.

 

Oh oh, that doesn’t sound good considering who worked on it.

 

I find it interesting that they consider the mic element itself noise canceling. Looking at the specs, it would be a nice element to use.

 

Now that I think about it, since the sl41 mic uses an electret element, you won’t need to run the mic gain very high. Wouldnt think it would cause a squeal in the radio though.