Better receive after transmit.

Discussion in 'CB Radio Forum' started by skellr, Nov 11, 2016.

  1. Nov 11, 2016 #1
    skellr

    skellr Road Train Member

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    The receive seems to improve briefly after a transmission, what causes this phenomenon?

    It will be quiet out and I'll key up and say something, and right after that I can hear a bunch of stuff that I couldn't before. It only lasts a couple of seconds. Static charge?
     
    skellr, Nov 11, 2016
    skellr, Nov 11, 2016
    #1
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  3. Nov 11, 2016 #2
    delta5

    delta5 Road Train Member

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    bad relay? need more info.
     
    delta5, Nov 11, 2016
    delta5, Nov 11, 2016
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  4. Nov 11, 2016 #3
    fargonaz

    fargonaz Road Train Member

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    Ya, what radio are you talking about?
     
    fargonaz, Nov 11, 2016
    fargonaz, Nov 11, 2016
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  5. Nov 12, 2016 #4
    Ridgeline

    Ridgeline Road Train Member

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    Many radios use electrical swtiching which has a problem that sometimes comes out, one of them is the switching on the receive portion and the oscillators needs to come up and stabilize, which causes a millisecond or two of being off frequency, which can sound loud.
     
    Ridgeline, Nov 12, 2016
    Ridgeline, Nov 12, 2016
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  7. Nov 12, 2016 #5
    skellr

    skellr Road Train Member

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    I've noticed with various radios in mobile setups, not sure if it's particular to mobile, haven't ran as a base. Old cobras, Galaxy superstar 3900, 959, and currently a Uniden 980.

    Often after a transmit I can hear someone talking, not enough to move the meter but clear enough to follow for 5 or 6 words, then the white noise increases/returns and drowns them out.

    Maybe it's more of a lul in the static level for a brief period after transmit. Although it isn't consistent it usually happens after a period of inactivity.
     
    skellr, Nov 12, 2016
    skellr, Nov 12, 2016
    #5
  8. Nov 12, 2016 #6
    rabbiporkchop

    rabbiporkchop Road Train Member

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    I would try to turn the vehicle off to exclude the vehicle itself from the source of noise. Maybe unplug all phone chargers and gps chargers. That would be driving me crazy.
    Fortunately, I don't have that issue.
     
    rabbiporkchop, Nov 12, 2016
    rabbiporkchop, Nov 12, 2016
    #6
  9. Nov 12, 2016 #7
    skellr

    skellr Road Train Member

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    It really does bug. you hear someone talking quite clearly and wonder why you weren't hearing them before. :mad:

    I've noticed it on various vehicles with various antenna types, was thinking it might be a mobile thing.
     
    skellr, Nov 12, 2016
    skellr, Nov 12, 2016
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  10. Nov 12, 2016 #8
    Neverready

    Neverready Medium Load Member

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    Some cobras were marketed with sound tracker which would allow increased reception immediately after transmission. I don't know if it momentarily disabled squelch or increased rf gain but it was a marketing tool they used years ago.
     
    Neverready, Nov 12, 2016
    Neverready, Nov 12, 2016
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  11. Nov 12, 2016 #9
    craig_sez

    craig_sez Road Train Member

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    maybe squelch is just at a point of on and off..
     
    craig_sez, Nov 12, 2016
    craig_sez, Nov 12, 2016
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    rabbiporkchop Thanks this.
  12. Nov 12, 2016 #10
    rabbiporkchop

    rabbiporkchop Road Train Member

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    It would be interesting to turn the squelch knob all the way to the right and see if the problem still exists
     
    rabbiporkchop, Nov 12, 2016
    rabbiporkchop, Nov 12, 2016
    #10
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