Question about Uniden PC78ELITE 40-Channels Base CB Radio

2 Answers

Pc78 elite cb

Bought radio from uniden worked fine then i messed with the cal switch and now i get no reception and no transmit.what do i need to do to get it back to normal. the squelch doesnt work either

Posted by badticker on

  • badticker Aug 12, 2007

    switch is on cb function i get no static or anything with squelch all the way down.purchased new antenna and coax but no help.keying mic shows action but no response.swr is at 3

  • Anonymous Mar 31, 2014

    increase wattage output internally in the radio



2 Answers

Dean Pitts

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You said squelch is all the way down, you mean turned counter clockwise? If so, turn your rf gain all the way clockwise. Your cal switch and swr cal knob will not affect your rx/tx at all. All it does is move to radios meter to what ever you tell it to (when in cal mode) that way you can set the radios meter to what the actual swr of the antenna is.

Try the rf gain all the way clockwise. Please repost and tell if it you got it working.

Rollin CBs

Posted on Jan 23, 2008


Louie Role

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Hi, You may want to check your PA/CB switch (should be in CB position) by moving it up and down a few times. A Cal switch if present in your model normally stands for Calibration which is a feature to measure the SWR of your antenna and should not really affect the TX/RX function of the radio. If still a no go, you may have to seek the services of a qualified radio technician or bring it back to your dealer for repair/replacement. Good luck and hopes this work out for you. Pls post again how things turn up. Kind regards.

Posted on Aug 11, 2007

  • Louie  Role
    Louie Role Aug 12, 2007

    Hi again,
    The SWR of 3 is an indication that you have a coax/antenna problem. SWR should be 1.5 or lower. You may have to check from the PL-259 male connector all the way to the base mount of your antenna. Another method of checking whether it is the Uniden or the antenna that is in question is by using a dummy load connected straight to the female SO-239 female connector of the Uniden. With a dummly load instead of an antenna, the SWR should be a flat 1. If it is relatively higher or will not calibrate, then something is wrong with the radio. If the radio will calibrate and show low SWR, then suspect your cable/antenna. The cable should be RG-58 rated 50 ohms and with a continuity (VOM) tester, show 0 ohms end to end, positve to positve, ground to ground but no reading from positve to ground. As with any communications equipment, antenna/chassis grounding is very important.
    Assuming that the radio is ok, you have to focus on the antenna/cable and lower down your SWR. It may be that you have to double check the way the coax is soldered to the PL-259.



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