Question about Cobra 29 LTD CB Radio

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Rfgain not working - Cobra 29 LTD CB Radio

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If no wired are broke......you have a bad diode or pot!
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS OF ELECTRONICS FUN!!!

Posted on Dec 30, 2010

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Hi, my name is John. Take the cover off, solder side down, check VR205, check that no wires are cut or come unsoldered, check for bad solder joints, if so turn unit over and re-solder. Put cover back on......Hope this was helpful....

Posted on Sep 01, 2010

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I have a cobra 29 Ltd chrome what is the dynamite and the rfgain and the delta tune and the talk back used for. What do you set it on


The mic gain is your output audio volume or modulation. RF Gain is you reception sensitivity. Delta tune is a gimmick it is supposed to slide the frequency a few kHz up or down for you reception of a radio that might have drifted off channel. Talkback is a tool to give you an idea of what you sound like ie quality of mic or volume or adjusting echo if you have added such a board to your radio. As far as adjustments RF gain is preferance. Mic all the way up on stock radio. Delta tune 12 o'clock. Talkback user preference. Take care......hope this was of help

Jul 25, 2014 | Radio Communications

1 Answer

Rfgain


what is the brand and model number of the radio?

May 16, 2012 | Radio Communications

1 Answer

HAVE A COBRA 29 LTD. MY SIGNAL IS WEAK WHEN I KEY UP AND I CAN"T RECEIVE A GOOD SIGNAL FROM OTHER CB RADIOS. DO I NEED TO HAVE IT PEAKED AND TUNE?


May be an antenna/coax issue. Turn the DYNAMIKE all the way up. Turn the RFGain all the way up. Turn the SQUELCH all the way to the left.
GET A "SWING KIT" INSTALLED!!!
"WILDCAT" IN LAURELVILLE OHIO
35 YEARS OF CB FUN!!!

Dec 08, 2010 | Cobra 29 LTD CB Radio

1 Answer

I have a cobra 142 base, and the receive is all most clear out. where should I start looking for the problem?


Check the RF gain knob. It should be all the way up. If the knob is bad, this could be the problem. You can un solder the wires from this knob, and hook them together to give you max gain, if your receive is back when you do that, the knob is bad.

You can replace the knob, (Call cobra for the part) or you can leave it soldered together, put some heat shrink on it so it doesn't short, and use it like that.

It doesn't really need RF gain.

Now on that radio, the RF gain is on a double knob with the SWR calibration. RF gain is only 2 wires, and the SWR CAL is 3. You would take the 2 wires next to each other and hook them together.

If there is still no receive, then the radio needs a tech. A part has failed in the receive section of the radio in the RFgain section. Probably a resistor lost its value.

Nov 19, 2009 | Radio Communications

1 Answer

Radio shack pro 2055


Hi, My first guess with the limited info is, either you have the attenuator turned(which is like an RFgain), or you have a defect in the antenna or coax(if it's mobile.) For the attenuator see pg.66 of your manual.
I assume it's picking up your ham radio when you key it, but at close range it'll pick it up without an antenna.
I hope this helps you sort it out,, Mechanic

Dec 01, 2007 | Radio Shack Pro-2055 Base Scanner

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