I am useing a em27 with power pack in my home and receiveing is all crackly but when use my other cb not connected to power pack everything is fine, please help

You check your radio with other radio very near. If radio is hearing your transmission then it mean that your Radio Power Module not working if very near radio not listening you then your preamplifier and Power amplifier is not working, it mean your Radio Transmitter faulty, only Receiver is working, you consult with any Radio Service shop. One other thing if you have software also check Tx/Rx frequency it must be same for simplex operation.

The light you see lighting up dictate how much power you have on transmit (TX) and the strength of your receive (RF) The more lights on transmit the stronger your signal. The more lights lit up on receive dictates how hard they are hitting your radio. Either by power or distance. Is this setup in your car or at you home? Many use a mobile CB in there home off a power supply. Either way I am very concerned about you only getting out a couple blocks. I will help you fix this. First your antenna is a major part of your set up. Spare nothing when buying this. I recommend Wilson 300 or higher for the mobile and IMAX 2000 for home. Some Wilson antennas tune and some don't follow the instructions that come with it and ask me if you are unsure. A good 50ohm coax is necessary too. RG58 or better. For just the CB in the mobile RG58 will do just fine. Now we get to your SWR (Standing Wave Ratio) which deals with return loss and reflection coefficient. To high of an SWR and you will lose a lot of your signal and you can burn up your radio. Your radio does not come with an SWR meter so you will need to purchase an SWR/watt meter and put it inline. The coax from your antenna will run into your meter and then run another coax from your meter to the radio and follow the instructions on how to adjust and check your SWR. So now we are at the point where your set up is properly set up and now to tune that radio up. These radios do not carry much power or have much modulation. The limiter in your CB is what limits the modulation. In your CB there is a pot that will adjust this. Here is what you need to do to get more power and more modulation out of your CB. VR2 is the modulation pot. Adjust this for maximum modulation. Now spread the coils marked LT5/LT12 just a little and spread the coils marked LT7/LT11 a lot. Being a new radio it should not need a receive adjustment at all. Moding the receive includes jumping the PLL and I don't recommend that. You may try to replace that potentiometer but outside of this and the steps above you should have a great CB when completed. Good luck, this should fix your CB set up just fine.

You can use a 13.8V DC power supply. If your CB is strictly stock a good 3 amp power supply will be fine. But if you do any power or modulation mods on it then go up to a 5amp power supply. The negative wire on your CB going into the power supply will serve just fine for a ground for a stock CB. If you start running any power then ground the CB again from the metal chassis to a pipe or maybe the hose faucet outside using a 10 gauge solid copper wire or copper braid strap. Many people run a mobile CB in their home. It's the same as the car accept you will run things from that power supply. If you have any further questions feel free to ask.

problem may be the button loose connection to the main board...we can fix these radios. cb shop temple, tx on yahoo search. The button is connected in so it controls both sections.

you should be able too. A single tone beep is usually small. About 2 x 1 inch or less. A 5 tone is a little longer, but they usually fit right by the speaker no problem.

this sounds as the osolator has moved of freq. to check this you need to put it on a scope

ant. light should only come on if you have a high vswr a bad thing did you check that cb/pa switch is set to cb check your swr this is not a good place to mount ant. as it is close to metal of back of cab

Hi,

CB radios use a frequency range and technology that is prone to noises both atmospheric, and man made. The height and gain of your new base antenna may produce more static than you may have noticed before. The question is 1) is the antenna close to any power lines to your home, 2) do you notice any increase or decrease of received signals compared to your mobile, 3) is the static steady or does it come and go.

Open up the back of the radio and check the solder joint from the antenna connector. I had same problem and it was this.

In order to test this unit you will need a power meter with a dummy load. connect the power meter and turn on the unit, key the microphone and look at the power meter it should have a reading of < 4 watts PEP unmodulated and = 4 watts PEP modulated. If you do not have this reading the RF transmitter in the CB might be malfunctioning. You will need a RF generator, a power meter with dummy load, oscilloscope and a multimeter to troubleshoot this problem with. If you do not have or do not know what this equipment is or how it works, please take your unit to a CB repair shop. Thank you, Shuttle83