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My cb radio is hooked up, has power, my driver amp is hooked up and has power, the linear is hooked up but is yet un powered. I should still be able to send and receive even with it off. all i get is static. even on 19 no trucker chatter. Everything is groundedvery well, the swr meter is under 1. Any ideas.

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  • Iron
    Iron Mar 20, 2011

    I need to know what your running to facilitate this. Name and model of each. Type of coax and antenna as well.

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  • 24 Answers

You might have a final issue and yes you should be able to talk and receive with the amp hooked up
and not under power.If you bought the radio used beware you don't know what the swr reading was on the last owners setup he could of burnd the final and it will affect your receive go get the radio tested cheap solution.

Posted on Apr 07, 2011

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Can i use a 10 amp power supply run my cobra 29 and 100 watt linear


I will answer the question. Figuring that 10 amps is continuous not peak. 10 amp multiplied by 12.5 it should be good for 125 watts. But you are on the ragged edge. I do agree you should lower dreaded key but you did not ask that question. But a swing kit will solve that. That is amusing SSB and the 80 watt cobra 29 comments.

Apr 21, 2014 | Cobra 29 LTD CB Radio

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Facts about Cb radio.


a Cb(Citizens Band) radio usually only broadcast on frequencies 26.965 to 27.405 megahertz. It is for mostly short range use 3 to 20 miles range. It comes with legal power of 4 watts. Ranges average about 5 miles. Don't expect big results off this little low-power Am transmitter. A basic 40 channel radio, Microphone, and "Magnet Mount" antenna plus 12 volt Dc 5A power supply will suffice. Place the Magnet mount on a metal file cabinet inside your house. hook up the Radio Shack 12 volt 3-5 Amp power supply to your 40 channel radio, Say Uniden pro510xl or Cobra 19 plus mini compact about $39 for these types. A $20 Radio Shack magnet mount. Turn on radio an talk. If you live in the city near lots of friends who have one too. You can talk on a private channel like Ch#40 and talk all night. The waves get quieter at night and extend farther into the Ionesphere;conditions are favorable 8pm to 12am. You should talk loudly within 5-7 miles easy. I like friends nearby; who live within 3 miles of me. Don't expect Long Distance with these radios. Unless you buy a big 1000 Watt Rf Linear an Tower 100 ft. with big Antennas costing $10,000. But remember the FCC will knock on your door and may give you 5 years $10,000 fines for anything of Linear amps 1000Watts. Just stick with basic tune and adjust,power mics(Cobra sells best). Talk with friends about fishing,hunting,gardens,tools,cars,women etc. Have Fun!!!

on Apr 02, 2011 | Cobra 29 LTD CB Radio

1 Answer

Need to know how to hook a palomar 450 HD to a connex 3300hp


If its in a car or truck use heavy gauge wire to power it. I use a 3ft jumper between the radio and amp. Should use a grounded antenna system. Not a "MAG MOUNT" type. Those can "feed back" rf to your radio and cause problems. If using in the house, a large power supply will be needed.I own a palomar elite 400 hd.It uses every bit of my 30amp power supply. Your hd amp should like the hp radio.

Dec 04, 2012 | Palomar Redman Cb Stop Hd 450-fet Hd 10...

1 Answer

I just purchased a cobra 29 LTD Classic mobile CB radio.Pro tuned high performance Mosfet Final I have a palomar 450 LD mosfet linear.will i have any problems?


Not if the power output from radio to amp is set correct and the jumper for coax is correct length and there is absolute perfect match between them and the antenna used. Afterthought: also the amp better be connected to something big enough to power it.

Apr 29, 2012 | Cobra 29 LTD CB Radio

1 Answer

Trying to find the right size linear amp to hook up to my Galaxy dx 949. I want max in/outputs. tired of being talked over. I have a Golden Eagle 150w amp, but have not connected it


That linear will be good for 100 watts of clean power. It has two MRF455 transistor which are 60 watts a piece. The cb will drive it with the carrier or dead key reduced to about 1.5 to 2 watts but i suggest that you read the linear's power while adjusting dead key not exceeding the 100 watts pep with voice. An NPC mod would be a good addition to get the modulation up with a low dead key.

Before you start the projection make sure you antenna system is in good condition high SWR will smake you linear in a hurry.

In factory condition 949 galaxy with a 3.8 carrier it will drive a 667v TexasStar. It is a low drive linear that will end all disputes as to who has more power. 8 out of 10 birds that escape will die of cancer withiin 72 hrs. Ok could not help myself. I would not suggest that unless you just want to damage other peoples receive. The v is for variable power. Hope this was of help.

Sep 14, 2011 | Radio Communications

2 Answers

Just got a Galaxy DX 2547. Barefoot works GREAT. Problem: When connecting to my linear (Texas Star 667V) rig fires up AOK on AM but on SSB it has issues driving the amp. SWR is OK Radio SSB output ~...


Have you tried turning the mic gain up,and not knowing Texas star model numbers,is it a mobile linear,if so,do you have a sufficient power supply?Just some thoughts off top of my head.

Aug 22, 2011 | Galaxy Radios DX-2547 40-Channels Base CB...

2 Answers

Just want to know if i should use my ll203 amp in am or ssb mode when running with a cobra CB radio?


What radio?? Does it have single side band(SSB)? If not, then don't use SSB.

AM - amplitude modulation
SSB - single side band.

If you have SSB, there would be a switch on it to transmit in SSB. If not, it is AM only.

Second, Has this radio been worked on to be able to run on an amp? If not, you will blow the amp.

A CB radio transmits dead keys with 4 watts of power, and transmits with 4 watts of audio.

a 4 watt dead key is too much for a linear amp. You will smoke the transistors. Also, 4 watts of audio is not enough to drive it properly. You won't get full power.

The dead key needs to be around 2 to 2 -1/2 watts,or what ever makes the linear dead key half its peak wattage., and the modulation (audio) turned up all the way.

It doesn't sound like you know too much about CB radio's. Not a big deal, you can learn. For right now you may want to take it to a cb shop and tell them you want a peak and tune, and set up to run a linear.

You can find CB shops usually at truck stops. Some area's they are other places. Check the internet for local shops.

Oct 31, 2009 | Galaxy Radios DX-959 40-Channels Base CB...

2 Answers

How do you turn the watts up?


I cross the wires on my radio hooking it up now I have no power .

Jul 11, 2009 | Uniden Bearcat Pro PC68XL 40-Channels Base...

1 Answer

Will 25 amp power supply pull 250-linear?


Yes it could, but... but it also depends on your antenna, what antenna are you using. Do not upgrade the power of your radio unless you know your antenna can handle the output power.

Oct 12, 2008 | Radio Communications

1 Answer

Killer radio needs help


I'm not sure if this will solve anything...but here it goes.
1st..Make sure you antenna connections are tight. it sound like it is arcing.
2nd.. make sure you SWR is very low. 1.5 or lower. (very important)
3rd.. make sure the rf power at your radio is turned down to low..over powering (over driving) your amp will fry your finals. (just as important)

If it's not any of these..then I'm not sure.
I have always used an Road King RK56. Not the knock off but the real deal. I would sometimes shock my lips on the metal grille , when I keyed up with my linear on high. I could also power flourescent lights when I got under them..lol and that was with a 250w box and a galaxy 99!

Jun 27, 2008 | Connex 3300 240-Channels Base CB Radio

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