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Homebrew External *S* Signal Meter for 27mhz

Discussion in 'Home Brew' started by JC_enfield, Jan 15, 2012.

  1. JC_enfield

    JC_enfield Member

    Sep 17, 2009
    Likes Received:
    Hi all,

    Not been on here for a while so happy new year etc.

    I have a friend who has a radio with a digital RF signal meter.... basically he doesn't like it and is tempted to go buy a new radio as a result.

    does anyone have any plans on making a external inline Signal meter. I have about 5 needle meters from old CB radios in a box of junk and was hoping I could knock something up.

    any plans or circut diagrams etc would be much appreciated :)

    Many thanks

  2. jon666

    jon666 Sr. Member

    Jan 24, 2006
    Likes Received:

    i could use one for my ar3300 i hate them dummy lights
  3. unit_399

    unit_399 EL CAPO

    Jun 17, 2008
    Likes Received:
    Replacing a digital S/RF display with an analog meter can be done, but it requires getting into the radio circuits.

    analog.meter 1.jpg

    Install an spdt miniature RCA jack on the rear panel of the radio and wire it as shown above. Try to use a meter that gives the same readings as the LED display. This way when the Analog meter is unplugged the LED display will display the correct readings. If the analog meter requires more or less drive, the sampling circuits will have to be readjusted, so the LED display will no longer be in calibration

    - 399

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