• 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!

cheap and easy tone generator

1iwilly

Sr. Member
Dec 7, 2008
860
626
103
62
ok so i took the mic element from this stock mic and wire a 3.5mm to the plus and minus where the element, was so i can use it with a cellphone when tuning a radio the question is do i need to add a cap or resistor parallel to the plus and minus for a cleaner audio output
 

Attachments

  • 20230809_092920~01.jpg
    20230809_092920~01.jpg
    167.5 KB · Views: 4
  • Like
Reactions: walterjn

You will probably need an L pad or a resistor in series to attenuate the signal. The microphone input on the CB is in the range of millivolts, whereas the headphone output of the phone is several volts.
i was thinking of a resister but got stuck on a value
 

dxChat
Help Users
  • No one is chatting at the moment.