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uniden Washington Key Up Noise

Discussion in 'General CB Services Discussion' started by TrevorAllan, Oct 12, 2019.

  1. TrevorAllan

    TrevorAllan Member

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    I got a deal on a Uniden Washington that is bone stock but it burps/farts when I key the mic. It's not any type of key up noise toy. I've heard that it's a common issue for this radio but i cant find any info online to attempt to fix it other than somebody knew somebody that had a friend that fixed his. Lol
    Any info would be appreciated. Thanks.


     

  2. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Welcome! I have never heard of this before, but I would guess that the radio needs to have all of its capacitors replaced. Capacitors can make funny things happen sometimes.
     
    Woody-202 likes this.
  3. TrevorAllan

    TrevorAllan Member

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    Thanks for the reply. That was the first thing i done to this radio and a Madison i bought with it was recap both of them. I've tried different mics, different antennas, changed coax and even grounding differently. It's got me stumped so I figured I'd give it a shot and ask.
     
  4. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    Did it have this problem before you recapped it? Just trying to get some of the basic questions out of the way and give the thread a bump at the same time. I am sure that someone that is familiar with this radio will chime in. I have a Madison too, they sure don't make them like that anymore.
     
    #4 Shadetree Mechanic, Oct 12, 2019
    Last edited: Oct 12, 2019
  5. TrevorAllan

    TrevorAllan Member

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    Your right, they don't make them like they use too. I love these old radios. It's hard to find one that's not butchered or beat up though.
    Yes it done it before i capped it. Others have commented how good the radio sounds but it farts when i key it that's when listened to it with my ft840 and decided to recap both radios then i tried to find info about the fart online. I've tried hand mics. power mics and even jumped the pins in the mic jack. I know people has paid good money for noise toys to do this but I'd rather have it go away. LOL
    I may post a short video of what it does.
     
    Shadetree Mechanic likes this.
  6. sp5it

    sp5it Master of puppets

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    You replaced wrong caps :LOL:
    For me it looks like tx/rx switching issue with VCO.
    Mike
     
    TrevorAllan likes this.
  7. Mudfoot

    Mudfoot Sr. Member

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    I can't recall, but I thought it was corrected by jumpering one of the mic pins.
     
  8. Mudfoot

    Mudfoot Sr. Member

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    I thought it did this when using a 4 pin mic. Do you have the stock mic? There's a local that's doing the same thing. I've heard this several times over the years. In fact, you know when someone is on a Washington, the noise is so distinct. We were talking about it the other day.

    Keep searching, or someone will soon chime in. There's a quick fix for it, but I can't recall, it's been so long.
     
  9. Woody-202

    Woody-202 Well-Known Member

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    A good dose of Pepto? :sneaky:
     
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  10. S&W357

    S&W357 Supporting Member Space For Rent

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    My Uniden Washington has never burped or farted. I've only used 5-pin mics. Maybe that has something to do with it.
     
  11. TrevorAllan

    TrevorAllan Member

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    I have tried several different mic and jumped the pins in the jack on the radio and it still makes the noise. I tried the factory stock mic.
     
    S&W357 likes this.
  12. Road Squawker

    Road Squawker Sr. Member

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    Did you replace the 10uF capacitor on pin 5 of the voltage regulator (MB3756) ? its labeled C133.

    You can probably put in a smaller cap there too.

    Good Luck
     
  13. TrevorAllan

    TrevorAllan Member

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    I replaced all the caps in the radio with factory values. I'll pull and check C133 to make sure it's within specs. I was actually sitting here going over the schematic and TR45, mb3756 area was what i was going to dig into next.
     
  14. TrevorAllan

    TrevorAllan Member

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    I just looked on my schematic and the cap on pin 5 of MB3756 is C164. C133 is on pin 3. Both are 10uF.
     
  15. KneeBiter

    KneeBiter Member

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    Is your radio the 858 or 8719 chassis?
     

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