20 Most Recent Connex CX-4300HP CB Radio Questions & Answers

it has a diode in back of radio near power wires. If it got hooked up backwards one time it will blow this diode and fuses from then on. Replace that Black striped diode near transformer inside radio. its in the far right. You have to take radio apart and solder in a new one or get a pro to do it.

write out a list of all the faceplates for that radio,neatly . Now tear them in strips so you can attach them to the wall, Now take a dart and toss it at those nameplates and whichever one it hits is the one you want.

If you need this you are telling me that you do not posses a ham license there fore you shouldn't be using this radio.

remove top and bottom covers and locate the resistors on the bottom of the main PCB. Unsolder them and remove them ,thats it. check out cb tricks for a picture of what to do .

pin 1 gnd pin 2 audio pin 3 tx pin 4 rx

Brand new. ? it is still on 10meter... there is a conversion to make them work on cb frequencies. although they should have tuned up and converted when you purchased it.. at no cost...

Take it to a good cb shop radioactiveradios do really good work on connex radios

you would need to take to a cb shop. if you never done this before. its simple process.. should cost less then $25 to have someone do this. correctly. they should even setup and tune it for that price also.. so its ready to go. tune ups should be free at a good shop. and there shouldn't be any bench fees involved. just saying. or thats how the shops are here in TX. anyways.

check the power switch contacts {ie do you get 13.8v at power on or after its fized a bit??? or roger bleep pa circuit can do this also

RF gain or volume turned up all the way?

IT could??? peak power, 14-15volts yeah.. the 4300 should put out 80w by itself.. as long as you have a low deadkey ie 1-5watts it should be fine. just don't put high wattage into an amp like that.. it will get hot QUICKLY.!!.. make sure your swr's are low low low.. 1.7:1 or lower... so your not getting reflected power... i would put a wattmeter with swrmeter like a mfj. or vectronic cross needle meter inline just to monitor it.... they go for $75 @ most places. Good investment... call email if need more help

You need to mention what kind of antenna...a car mount or home mount.Here is the owners manual: http://www.cbtricks.com/radios/connex/cx4300hp/graphics/connex_4300hp_om.pdf

Oin 2 may be grounding, or the relay contact is not opening to break the circuit of the recieve section. Or your SWR is so bad that what you are hearing is from energy transfer alone and copper corrosion can act as the detector diode.

Pin2 of the mic may be shorting to ground.

http://www.cbtricks.com/radios/connex/cx4300hp/index.htmBeware there have been a few design changes thru the years be this should not matter as far as the owners manual goes.

You will need an SWR meter to check your antenna. FIRST.I would find help at a local cb shop.. They SHOULDN"T CHARGE to help you SET the swr. only if you need a part or something .. I don't charge to SET SWR"s .. only if the cust needs a insulating washer or another antenna, or new coax, so-239 etc... I would be glad to help you.. let me know if we can CB Shop Temple, TX Any shop shouldnt charge you just to see if it works!!

• Sounds like you had a problem with the antenna set up or the corresponding connectors. If not done and checked right you will get an SWR through the roof. When the SWR is high the heat is returned back down the coax to the back of radio and right to the final transistor and smokes it.

• Your radio being in a box for 3 years should not have really had any effect on its performance. There could have been some dust collect in there. You might have had the power turned up to high. Pop the covers off and see if anything is burnt. That's the first step.

• Hope this helps.

A new unit goes for $280 range then conversion to run cb freqency $30.Tune-up $50 you should get 70 watts older units 90 watts newer unitsAs far as the knobs goBand D with channel 19 selected this is 27.185 citizen band if you radio has had the channel expansion done other wise it is not accessible.Select AM10 khz switch should be off mic gain know depends on the tuning of your radio and mic choice.rf gain full clockwise best reception you will just have to play with this knob and the squelch to your liking Make sure the thing is working properly before you buy capacitors dry out and the connex radios are know for problems with their pcboards. good luck