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RF gain problem

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bluecurt49
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RF gain problem

Post by bluecurt49 » Wednesday, 25 January 2017, 18:26 PM

I have a connex 3300hp and the rf gain knob don't change the noise none ive changed the pot and transistor checked the resistors and it hasnt helped any ideas


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jessejamesdallas
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Re: RF gain problem

Post by jessejamesdallas » Wednesday, 25 January 2017, 20:53 PM

Is this a New radio? Someone could have added a Variable Power in place of the RF Gain and just set the RF Gain to wide open...Check your DK and see if it changes when you adjust the knob.
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MDYoungblood
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Re: RF gain problem

Post by MDYoungblood » Thursday, 26 January 2017, 10:51 AM

The RF gain doesn't reduce any noise just the receive signal, does the signal meter drop when you turn the knob to the left?

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bluecurt49
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Re: RF gain problem

Post by bluecurt49 » Thursday, 26 January 2017, 17:02 PM

it does not change anything and it is an connex3300 side mic. its an old radio

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bluecurt49
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Re: RF gain problem

Post by bluecurt49 » Thursday, 26 January 2017, 17:36 PM

what would cause it to quit working


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sonoma
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Re: RF gain problem

Post by sonoma » Friday, 27 January 2017, 7:32 AM

trace the wires where they solder to the main board and verify they are making good connection. you could have a bad solder joint in the area where the wires hookup causing it not to change. get your magnifying glasses on with a solder gun and start checking for a bad solder joint. even look at the caps in that area since you said it is a old radio. you may have some of them failing. look on cbtricks.com under connex and they have a picture of the main board for active devise locations. this will also help you look at each part location. I bought a galaxy 44hml whish is a old radio on ebay for next to nothing because it did not work properly and it had bad solder joints in the vco PLL areas. works great now.

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bluecurt49
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Re: RF gain problem

Post by bluecurt49 » Monday, 20 February 2017, 19:00 PM

the problem was fixed the ground wire on the switch was in the wrong place on the switch

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sonoma
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Re: RF gain problem

Post by sonoma » Monday, 20 February 2017, 19:13 PM

glad you found it. just takes time to trace out the wires and the locations plus bad solder joints on most radios.


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