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Need some help with a mic socket project

Discussion in 'CB and Export Equipment and Accessories' started by kaos513, May 10, 2018.

  1. kaos513

    kaos513 Well-Known Member

    Apr 10, 2014
    Likes Received:
    Hello guys im looking for some info on a mic socket design so that i can send tone to the mic socket using my signal generator? thanks


  2. Onelasttime

    Onelasttime Well-Known Member

    Aug 3, 2011
    Likes Received:
    You just pump it into the audio line. That said it is the worst place to inject. Why you ask? The audio on the mic jack has to go through filter sections so while you can do it it is not the best place to inject a signal in my opinion. That said it has been done that way forever and a day. Luckily a 1000 cycle tone is not that bad in terms of filtering it normaly passes through no problem as does a dual tone for SSB. If that is what you mean you will be fine. I am sure you have hard of direct inject? The reason for that is to avoid the audio filtering that would be present if you injected the signal at the mic jack! Cheers!
  3. Captain Kilowatt

    Captain Kilowatt Professional Amateur
    Staff Member

    Apr 6, 2005
    Likes Received:
    It is also a bad idea simply because it is extremely easy to hit the radio with too much audio. Microphone levels are very very low while most test gear, or any audio gear actually, has an output 30-40 dB higher than what a microphone input requires.
    kaos513 likes this.

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