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CB transmit problem


 
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theFleured
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PostPosted: Mon Sep 02, 2013 9:01    Post subject: CB transmit problem Reply with quote

Tried out my cb for the first time at the weekend, I can hear people just fine but when I press the transmit button I just get a really loud contrast whine. I would guess it's feedback but is this even technically possible with a cb?
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Yojimbo



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PostPosted: Mon Sep 02, 2013 11:57    Post subject: Reply with quote

Yes its very possible. I would check the mic wiring first. Is it the original mic and if so are all the wires securely soldered at each end? If its not the original mic you need to make sure its wired correctly. All modern diode switched cbs need at least 4 wires to work properly.
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theFleured
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PostPosted: Mon Sep 02, 2013 11:58    Post subject: Reply with quote

It was a set I bought, it's cheap but all brand new, I could pop it open and see what it's like inside.
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Yojimbo



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PostPosted: Mon Sep 02, 2013 12:02    Post subject: Reply with quote

Does the squeal alter much if you waggle the mic cable? And have you ensured the antenna install is good? Where is the meter swining to on tx?
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theFleured
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PostPosted: Mon Sep 02, 2013 12:06    Post subject: Reply with quote

Nope it doesn't alter at all, TX meter is about halfway.

It's more a constant tone than a whine, my description wasn't very good. You can hear it in the video which I hope to post in the next couple of days.

Antenna is mag mount on the bonnet (it's not the longest antenna though), it came with the kit.
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unclebazwold
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PostPosted: Mon Sep 02, 2013 12:12    Post subject: Reply with quote

But I can hear you if you stand away from the motor.
Bazza :?
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Yojimbo



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PostPosted: Mon Sep 02, 2013 12:29    Post subject: Reply with quote

If its a new radio then I would test it for a sueal on a dummy load and if its stillhappening send it back
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theFleured
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PostPosted: Mon Sep 02, 2013 12:32    Post subject: Reply with quote

unclebazwold wrote:
But I can hear you if you stand away from the motor.
Bazza :?


Yes but you were only 12 feet away so it probably wasn't through the cb Laughing
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unclebazwold
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PostPosted: Mon Sep 02, 2013 12:38    Post subject: Reply with quote

Laughing  Laughing  Laughing
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hotchpotch



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PostPosted: Fri Aug 01, 2014 21:26    Post subject: Reply with quote

theFleured wrote:
Nope it doesn't alter at all, TX meter is about halfway.

It's more a constant tone than a whine, my description wasn't very good. You can hear it in the video which I hope to post in the next couple of days.

Antenna is mag mount on the bonnet (it's not the longest antenna though), it came with the kit.


You sure it's not in PA mode and feeding back?
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hotchpotch



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PostPosted: Fri Aug 01, 2014 21:27    Post subject: Reply with quote

Doh!  Old thread... probably sorted by now
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theFleured
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PostPosted: Fri Aug 01, 2014 21:33    Post subject: Reply with quote

I had it wired into the car speakers, changed to the high level input and the noise went away. Unfortunately, at the last meet I didn't seem to be able to respond / transmit
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Yojimbo



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PostPosted: Sat Aug 02, 2014 10:58    Post subject: Reply with quote

Maybe its broken. Cbs are never built that well. Or not set up right. If you adjusted the antenna for swr then that will tell you whether you have power out and also what the antenna condition is?
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