Question about Cobra 29 LTD CB Radio
I got a new radio yesterday. The SWR's were really high took it to a CB shop and they fixed her up. Set my antenna all was good till a few hours later. Now the darn red light is on when I key up. But the SWR's are low. Everyone say's they hear me fine and I can hear them but that darn red antenna light is still on.
The antenna warning light on the Cobra 29 LTD has a pot ( varabile resistor ) that sets the senativity of the light coming on. If you open the radio, you'le see the pot at the back of the radio. It's the last pot in the rear of the chassis Simply turn it more torward the center of the setting ( anyplace is ok as it means nothing to the preformance of the radio ). The light won't come on unless the SWR's are high. Good Luck and if I can help more, you can email me at this address or at my email address [email protected].
Posted on Jan 07, 2008
As close to the antenna as you can, take 6 feet of extra coax and make a coil out of it about 6 to 8 wraps. Use electrical tape to hold the coil together.
It should be a uniform coil. One loop next to another.
I take a spray paint can and wrap the wire 8 times, then tape it around with electrical tape. Wrap the coil with tape. When you pull the can out the coil will stay in tact.
When you turn up the power, depending on the antenna and coax, you can get what is called common mode currents. This can sometimes trip this light. Basically stray RF travels down the outside of the cable,when normally it should stay on the inside. The coil is an RF choke. It will stop the RF from traveling down the outside of the coax. it has no effect on the signal on the inside.
This will also help keep you signal from bleeding over your car stereo and other RF problems.
Posted on Apr 24, 2009
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