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

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Is the red ant light supposed to light up when the mike is keyed or only when there is something wrong?

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If the radio has been paeked and tune on some cobra the light will show red. there is an adjustment inside the radio in the back near where your coax comes in that you can adjust to fix this problem.

Posted on Nov 18, 2009

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Only when something is wrong, probabley too high of SWR

Posted on Nov 08, 2009

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1 Answer

When I key the mike I get the red light.I have a galaxy979 and a no ground ant


there are two lights on the face of that radio near the channel selector.When you turn the radio on the top top light should be a greenish blue until you talk then it should turn red to let you know that you are transmitting . If the light below that one turns red at the same time then you have an antenna problem. Its not a no ground antenna its a no ground plane antenna ,you still have to ground it .

Nov 18, 2015 | Radio Communications

1 Answer

The red light on the front of my rainbow dies not come on. Is it supposed to or is something wrong. The machine is only 3 months old.


Something's wrong. If the light's not on, how would you know if it's running??
Heh, Heh..... :o)

Seriously, it is a slight problem. A minor one, but a problem.

Nov 15, 2014 | Rainbow Vacuums

1 Answer

Does the green light turn red when I key the mike


Yes ,it must turn red when transmit.
you have to press the PTT and hold buttom to calibrate the SWR meter for readind.with the switch to calibrate(cal)

Nov 23, 2013 | Cobra 25 LTD 40-Channel CB Radio

1 Answer

When i press the mike two red lights are coming on end the reception isn't good how do i fix this problem


Green changing to Red it normal operation from receive to transmit.

However the ant light should not light it is to indicate the SWR= standing wave ratio.This does not normally indicate any reduction in you ability to receive signal it only refers to reflected power from you antenna system to your receiver/cb. You may have a insulator in the wrong location. If it is an solid mirror or body mount the mount must be grounded with no insulator on coax side and an insulator on the antenna top of mount antenna must not be grounded.
If you have a coax that is damaged and i mean even bend from pasting thru a door or other "pinch point" it may be bad.
http://www.firestik.com/Meas-SWR.htm

Sep 16, 2011 | Cobra 29 LTD CB Radio

1 Answer

When i key in both green lights turn red. is this normal ?


One of the lights is marked RX/TX. This light normally turns red when you press the mike key. The other light indicates a bad SWR if internal circuits are properly aligned. If someone has turned the pot which sets the level at which the light comes on, it may come on when you press the mike key. Check your SWR with an external meter to see if you have problems in the antenna system. The way I set this light in my shop is to put a 150 ohm resistor on the antenna connector and set the control so that the ANT light just comes on.

Jun 15, 2011 | Cobra 29 LTD CB Radio

2 Answers

Radio will "receive" but not "transmit". Radio, antennas, and wiring are all less than two years old. Should I try a new mike?


Firts you have to check for carrier.For this you need an swr meter.2) Check continuity between the pl259 tip and antenna.3) Check for modulation (voice) if all of the above are OK. 4) Check if your display changes to transmit when you press the mike. IF all fails,then try another mike.

Jan 27, 2010 | Cobra 29 LTD CB Radio

2 Answers

When i key up the mike the tx/rx light and the ant


your swr setting are off wack fix your swr

Oct 02, 2009 | Cobra 29 LTD CB Radio

1 Answer

The ant light and the other light light up red when i key the kic


the tx/rx liight is green when your radio is recieving signals and turns red when you are sending signals. the ANT light is red when your SWR is too high (over 3)

1. turn the knob labeled swr cal all the way counter clockwise
2. set the rf swr cal switch to the CAL position
3 key up the mic and hold it while you rotate the swr cal knob until the needle reaches the swr cal postition
4. set the swr cal rf switch to the swr position
5. key up the mic while on chanel one (record the the number)
6. switch to chanel 40 key up the mic (record the number)
if the number on chanel one is lower than the number on chanel 40 then your antenna is too long.

Sep 14, 2009 | Cobra 29 LTD CB Radio

3 Answers

Red ant light


The red light always comes on while mic is keyed. It is designed to do that. It will blink on and off while mic is keyed if there is a SWR problem. This is explaned in operaters manual.

Sep 24, 2007 | Magnum S9 Base CB Radio

1 Answer

Cobra 29GTL Won't Transmit


if the red ant light comes on this means that you have antenna trouble either in the antenna itself or the coax but this should not have anything to do with the radio not transmitting. it sounds to me that you have a bad audio chip or a bad power output transistor. in either case you should really take it to a cb shop and let the professionals solve your problem, good luck!!

Aug 16, 2007 | Cobra 148 GTL 120-Channels Base CB Radio

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