Question about Cobra 29 LTD CB Radio

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All connections are good it has power and ground antenna is connected properly but i still can't send or receive what can I do to remedy this problem?

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Posted on Jan 02, 2017

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SOURCE: Hooked it all up per the manual, Clean power,

Have you tried it in another truck where a radio does work? If so and it didn't there either I'd say you have a bad radio.

Posted on May 04, 2010

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1 Answer

Swr on channel 1 and 40 are over 3, what can I do?


Check your antenna. Make sure it is getting a proper ground. If mag mount; make sure base of antenna and where you put it are both super clean. Check where whip goes into coil or base. Make sure all allen screws are tight and whip is not either all the way down to the base or up to the top. If antenna is mounted; make sure that it has a good ground. You might have to remove some paint around the base to get a good connection. DO NOT TRANSMIT WITH A HIGH SWR. YOU CAN BURN OUT THE EXPENSIVE POWER OUTPUT TRANSISTOR. Hope it helps.
Tom

Jul 15, 2012 | Cobra 25 LTD 40-Channels Base CB Radio

1 Answer

How do i ground my antenna base or mobile ?


If you're using it in a car the antenna makes contact with the body of the car either through the magnetic base, if you're using one, or the metal clip if that's how you attached the antenna to the car. Either way the contact between the antenna and the body of the car acts as a ground.

If you're using it in your house it depends on the type of antenna you're using. Home base antennas have spikes that stick out from the base of the antenna. These act as a ground. If you're using a mobile antenna in your house, which will not give you a great signal, you need to connect it to something metal. Linking the body of the transceiver to the copper piping of your central heating or water heating system provides a good ground for the radio. As the ground of the antenna is connected to the metal of the transceiver body this is the same as grounding the antenna. Even if you're using a proper homebase antenna it's still a good idea to earth the radio as it improves the signal and reduces noise interference

If you're using the CB on a ground floor you may be able to run an earth braid wire outside and put a metal spike in the ground and connect it with your earth braid. Connect the other end of the earth braid to the metal on the body of your radio. NOTE: When connecting an earth to the body of your radio it must not be a painted part of the radio. You could drill a small hole in the body if necessary and put a nut and bolt through it to connect to the earth wire.

I hope this answers your question.

Jan 08, 2011 | Cobra 19 DX IV CB Radio

1 Answer

How do I connect an external AM antenna


G'Day
The AM loop antenna needs to connect between the terminals marked as "AM ANT" and "GND" on the rear top right corner of the amp. This is the normal configuration for a loop antenna. The other option(not using a loop antenna) is to connect "GND" with a single insulated wire to a decent earth connection (2 m copper stake hammered into the ground or a water pipe, and a single wire elevated as long and as high as you can. this style of antenna system is not generally used these days, as the transmission power of radio stations has increased greatly over the years so that a small loop antenna will do the job So, most stations should be tunable with just the loop, remember however, that it will be directional. If the loop is in proximity to other electronic gear, it may not perform as well. Keep it as far away from the rest of your gear as you can.
You will generally get no AM stations AT ALL until you have connected the loop to both terminals. Happy to talk to you further about this. Please rate my solution. Cheers
regards robotek

Apr 08, 2010 | Yamaha HTR-6130 Receiver

1 Answer

My home theater speakers make a constant hum whenever my receiver is on. The loudness of the hum changes with the volume control, and goes away entirely when the system is muted. All components are plugged...


jd40,
Sounds like a grounding issue. The first two places to look into is the powered subwoofer and antenna. During your last test, did you leave the FM antenna and subwoofer connected? Many times the hum is directly related to the antenna and/or the subwoofer and to how they are grounded; creating a ground loop through the receivers ground on the outlet. If the antenna is grounded to the dwellings wiring, hum is inevitable and sometime you can get a ground loop hum from how or how & where the subwoofer is grounded. Try taking them completely out of the loop.

Also try taking it further back to the basics, start with the receiver plugged into a known good grounded outlet with no surge or line conditioner in the loop and nothing connected to the receiver, nothing. Use one speaker and different wire to test each speaker output while in tuner and any other mode but phono. With no signal, you will either get nothing (no hum or static) or just static in the tuner mode. No hum is a good sign. Some systems will mute the speakers if no signal is connected to eliminate the static from being produced through the speakers but a ground loop hum will most likely still be produced even in mute. If you get a hum when nothing is connected to the receiver, try looking into getting a better grounded outlet, even maybe to a different dwelling.

-Chris

Jan 30, 2010 | Yamaha 5.1-Ch. Surround Sound Home Theater...

1 Answer

Roady XT "Antenna" problem


one of 3 things, either your antenna is not insight of a skies view to receive the signal, or its wire is broken at the antenna, but if you remove the antenna connection frequently it pulls the center wire out of the connection on the end that fits into the radio when its plugged in push on the conductor at the back of the plug and see if this helps,alos if connection is loose take a safety pin and carefully between the outer plug case ans the ground fingers around the center pin push these in so you get a better ground, and lastly try another substitute antenna, I have re-soldered my connections numerous times to fix this issue, delphi doesn't make a very rugged product, good luck

Nov 17, 2009 | Delphi Roady XT XM Radio Receiver

1 Answer

Reception is very poor. Grounding issues? Please


Reception has little to do with grounding. The ground plan is for transmitting. As long as the coax is connected and is in good standing, it should receive fine regardless of grounding.

There are a few reasons you may have bad reception.
  1. Turn the RF GAIN all the way up. This is your receive sensitivity.
  2. Squelch is too high. It should only be turned up enough to cut out the background noise.
  3. Poor antenna. If the antenna is cheap, and not made well, this could be the problem.
  4. Not enough of the antenna above the vehicle. It needs to be at least 60% of the antenna above the vehicle.
Hope this helps!

Oct 21, 2009 | Cobra 29 LTD CB Radio

1 Answer

SureConnect problem?


The problem is most likely the ground connection of the antenna to the vehicle chasis.

If the body is metal (and not a composite material) the base of the antenna should be grounded to the vehicle through the mount. Usually, the antenna base has "teeth" on it to make a good ground connection to the body. If this mount is not tight or there is paint or rust preventing a good electrical connection, you'll get weak reception.

Charlie

Aug 20, 2009 | Audiovox Xpress EZ XM Satellite Radio...

1 Answer

"Antenna" prompt


your sure connect antenna is bad that is why you get this message or you have something hooked up wrong check the power and ground on the unit if it has one .... some have it, some dont but most of the time its just a bad wire

Jul 27, 2008 | XM Radio (XMP6000)

2 Answers

Power but no sound


hook up the antenna at the back and try to tune-in to your favorite radio station.
read the description at the back of your rca rt2250, how to connect your antenna.
connect it properly and raise up the antenna, put it where the signal is good.

Feb 17, 2008 | RCA RT2250 System

3 Answers

FM RADIO DONT WORK..MODERATE AM


hi sounds like a torn ant wire or bad ant change the ANT with all the length wire till the reciver make sure a good connection in the reciver good luck

Mar 26, 2006 | Jensen 200W AM/FM/CD Car Receiver - CD4610

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