Question about Midland Radio Midland 18-258 27MHz Window Mount CB Radio Antenna

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Hi chris here im using a gx300 with a 100w linear amp on the 27mhz band i can hear people but still cant seem to get out im using a staion master antenna please help tried everything

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Yikes, using a linear on CB is illegal! You could get into real trouble doing that. The radio \'barefoot\' with that antenna should work very well, and will be legal. If you hear stations, but cannot contact them, there is a good possibility that the linear is not working. Or, the radio may not be putting out power. Do you have access to a watt meter or SWR meter? Find someone who has these instruments, and they can help you out. Best of luck to you!

Posted on Dec 28, 2014

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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.

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