Question about Cobra 29 WX NW ST 40-Channels Base CB Radio

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How do i set it up - Cobra 29 WX NW ST 40-Channels Base CB Radio

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  • Dean Dishman May 11, 2010

    what exactly are you trying to do? Set it up as to what ? need more info


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Going on the info provided.1. mount the radio. 2. connect your antenna. 3.Connect Power- Red to Pos. Black to Neg. 4. Connect microphone. Note, be sure antenna is mounted on vehicle in the center of the roof. This provides omnidirectional signal. Be sure to set your Standing Wave Ratio.
If this fails... READ the instruction manual that was packed in the box with your radio.
If you still have no luck, return the unit back to the store. Forget the whole thing. PLEASE!

Posted on Aug 14, 2008

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I don't have one on my bench, but I found a picture of one online.

By what I see, here is how you need the switches set:

Mic Gain - turned clockwise, depends on how much modulated power you want to put out.

Squelch - turn all the way counter clockwise to open it up. Then turn it clockwise to set it where you want.

RF Gain - Turn all the way clockwise will open it up, then turn back counter clockwise to where you want it set.

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Cal/SWR/(can't read the bottom letters on the picture) - set to Cal to calibrate the meter to the SWR of the antenna, set to SWR so that if something happens to the antenna system, it will go high and you know there is a problem, set to the bottom to see the output power and incoming signal power on the meter.

ANL-NB/NB/OFF - set to the top to turn on the Automatic Noise Limiter and Noise Blanker, set to the middle to just turn on the Noise Blanker, and set to the bottom to turn both off.

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CH9/(can't read but probably says NORM) Set to CH9 to lock the radio on the channel 9 emergency channel. Set to the bottom to use the channel selector to choose the channel to monitor or transmit on.

And lasty, but obviously, set the channel selector to chose the channel to monitor or transmit over.

This should help you out completely. If you have anymore questions at all, don't hesitate to contact me at I will answer any and all questions I can.

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Connex 3300hp radio


Based on your post/description:

1. how do i set the swr
Normally SWR are calibrated on your operating channel (where you usually stand-by). This is to maximize transmit power and receive sensitivity. To set SWR, switch to channel of your choice, switch SWR control to CAL, key or press PTT, while pressing PTT rotate ADJ knob until max deflection of needle on meter, release mic, switch control to SWR, key/press PTT, needle reading/deflection is SWR for that channel.

I would suspect that your SWR will vary from your current 1.4. This is because you have too big excursion of channels (240 channels).

2.reading a 1.4
This reading is good enough and should do. However as earlier stated, you seem to have 240 channels which would mean that your radio + antenna moves in a wide bandwidth and since the antenna tuning is affected by frequency, your SWR will also be affected by channel.

Best if you can further lower it down.

3. some cb cant get me
This is because the standard CB radio is only 40 channels. The next would be a 80 channel and then 120 channels.

4. is it my radio
Yes, you have a wide coverage radio almost an extended 10 meter rig.

5. do i have to set my radio on high or low to set my swr
I will assume you are referring to power output, set it to HIGH when doing SWR calibration

Hope this be of some help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

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