• You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
  • Click here to find out how to win free radios from Retevis!

horrifying feedback - mic attached

kb8ufp

Member
Mar 15, 2011
12
0
11
45
OK so I'm intending to put my newly aligned and awesome sounding 1-632 in the 4-wheeler, but the mic I'm using has an electret element, so I wired up a cap and resistor and 9 volt. Now theres a terrible feedback whenever the speaker is attached. It looks like the PTT doesn't switch the mic out at any point and neither does the mic (which is a repurposed kenwood speaker/mic.) My guess is the old mic's PTT switched out the mic when not depressed. is this common for mics?

Looking at the schematic for the 1-632 it looks like the mic is amplified and goes directly to the speakers??? Any reason why the manufacuter did that? Of course its tapped off and goes into the double balanced mixers at a certain point too.
 

dxChat
Help Users
  • No one is chatting at the moment.
  • @ Mark Malcomb:
    Hello BJ. Been a long time since I've been on. You doing well? Mark Malcomb
  • @ Naysayer:
    I’m
  • @ kingmudduck:
    Hello to all I have a cobra 138xlr, Looking for the number display for it. try a 4233 and it did not work