Question about Midland 1001Z 40-Channels Base CB Radio

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Do i need a certain antenna?

I have a 48" whip antenna mounted to my fiberglass cap on my pickup. should this be mounted to the metal body? im not transmitting very well at all.

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  • Contributor
  • 60 Answers

The fiberglass provides no ground plane area for the antenna and radio waves. Your Standing waves (aka: SWR or Reflect) are probably very high. I suggest mounting the antenna on the cab of the truck. You "could" try aluminum tape on the cap and mount the sheilded side of the coax to it somehow. Without a ground plane much of the RF Power of you CB will be reflected back to the Final Output Transistor(s) (Final or Finals), overheat it and possibly damage and burn it/them out. If you are just running the CB without an amplifier(Linear or sometimes called a box), a magnetic mount antenna should work fine and be less of a problem than permanently mounted antennas. That's a plus when going into a parking garage. Even if you decice to get an amplifier at a later date, you should be able to use it with the magnetic mount antenna as long as the antenna you but is rated for several hundred watts, you Standing Waves are Low, and the amplifier doesn't put out more power than the antenna is rated for. I hope this helps.

Posted on Apr 17, 2014

  • Jim Verge
    Jim Verge Apr 17, 2014

    decide. Trying to type too fast

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Posted on Jan 02, 2017

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stefano-61
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SOURCE: MIdland no sound s/rf dancing

may be u burned yr final transistors...check if yr antenna is well grounded and try just after this to transmit, if the indicator is not stable on the green area when you are in "am" modulation stop to try and bring to the assistance
rgds Stefano

Posted on Jan 05, 2009

Ironfist109
  • 3018 Answers

SOURCE: Transmitting problem on motorcycle

  • Make sure you run the CB directly to the battery. What you are hearing is the alternator whining. Even then sometimes a low pass filter may be necessary. Make sure the chassis of your CB is grounded with a copper braid strap too.

  • Hope this helps.

Posted on Nov 03, 2011

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2 Answers

I just bought a cobra 29 LTD Chrome along with a 102" whip and spring. Best place to install antenna on semi dump truck? Suggestions? And how critical are your surroundings when tuning the antenna?


what kind of truck? does it have a fiberglass body? If it does then you would have to go directly to the chassis to mount the antenna.If you got a different antenna , like a Wilson 2000 , you could either run it co-phased or single. you would have to get mirror mounts and coax or buy a kit that has it included . Tuning a single antenna is easy but a twin is harder to do. you have to tune each antenna individually. what you also have to do is stay clear of buildings, overhead electrical wires ( high tension ) and metal objects. Now we know this is impossible so just get the SWR down as low as you can and also make sure your doors a both closed when checking the swr.

Aug 27, 2015 | Cobra Radio Communications

1 Answer

How to set standing wave


The SWR is set by the antenna. It depends on the type of antenna you have as to the correct procedure. If the antenna has a stainless steel whip then a set screw is loosened so that the whip can be adjusted up and down. Most Fiberglass antennas have to be trimmed. Some of the fiberglass antennas have tuning adjustments under the rubber cap on the end. Check you SWR on channel 1 and on channel 40. If it is higher on 40 than it is on channel 1 then your antenna is too long and needs to be shortened. If your SWR is higher on 1 and lower on 40 then the antenna is too short. There are many articles on the web concerning SWR. I urge you to read up because having the SWR set on your rig will ensure many years of good operation and performance.

Mar 10, 2013 | Cobra Radio Communications

1 Answer

When i que my mic the display light shows no antenna light unless im touching the antenna i tried this on 2 different trucks


The mounting and adjusting of the antenna is crucial,if it is a magnet mount,the surface must be clean,dry and best to not have any rust,also bottom of the magnet needs to be clean and mount it to the largest area of metal on the vehicle...the trunk lid,middle of your roof are the best.Permanent mounts need to be touching bare metal at the mounting hole not paint,again either mount requires SWR adjustments to match the radio it's attached to,it may require trimming of the metal"whip" if it needs to be lowered for the best reading,also don't rule out the radio chassis might need to be grounded as well.For general safety I would not recommend touching an antenna while it is transmitting any radio signal...if all above is good,you transmit and receive fine,more likely light is faulty or needs it's sensitivity adjusted...Good luck,hope this info helps.

Sep 03, 2011 | Cobra 29 LTD CB Radio

1 Answer

I have a Uniden PRO510XL radio and a 48" single


then the antenna needs to be moved. antennas have to have a ground plane to get correct swr below 3... or there may be a bad ground. try moving antenna @ different angles to see if it changes swr's or even opening the door away or closer to the body will make it change. also check the insulator it should be on top. call if you need help

Dec 22, 2010 | Uniden PRO510XL 40-Channels Base CB Radio

1 Answer

I can't get the swr value close to 1 it's over 3 what am i mising


Several things are working against you.
1 Antenna location= Needs to be in CENTER of car or truck, and high. no grounded metal can be next to the element (the hot/positve part of the antenna)

2 the only way to really ground the antenna is by having a flat metal ground plane under the antenna. DC grounding does NOT do this, that is a misunderstanding.

3 make sure you use a tunable antenna. I have found the wilson's to be very easy to tune and performe very well, for a base loaded antenna.

4 in short a wilson or k40 magnet mount placed on the very top of the roof in the center will have a perfect ground plane. Then shorten or lengthen the steel whip to ajust your SWR's. You will get the best results this way. This is the ONLY way to achevie good performace.

5 I will say this the absoulte best antenna is the 102"steel whip, if you got the clearnce and dont mind it hitting tree limbs put it on a big magnet mount with a spring at the base and youll have a perfect antenna. But the wilson is shorter and easier to tune.

May 15, 2010 | Cobra 29 LTD CB Radio

1 Answer

I have a pickup with a fiberglass bed cover, inside is a Cobra 29. When the k40 antenna is on the bedcover (magnetic mount w/ 6x6 inch metal plate glued to the bedcover) radio will give me an antenna...


Well, the k40 is designed for roof or trunk mount,you would not be getting a good ground,plus you would be getting feed back from cab,no good transmit or receive. Get a good 102" fiberglass or steel whip that's bumper mount,mount it on right rear bumper and you will be good to go.

Mar 28, 2010 | Radio Communications

2 Answers

Is it my CB antenna or something else


First off, Midland makes a fine radio. Make sure your squelch is turned all the way down to receive distant signals (down meaning counter clockwise). The through the glass antennas are not the best thing in the world. I personally use a 102" whip and a 6" spring on a modified mirror mount. It is installed on the tailgate side of the tool box. The TX and RX is amazing. Wilson and K40 make great antennas also.

Jul 07, 2009 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

S it my CB antenna or something else


take a 9 foot wire to the bad radio put the the wire into the center of the ant jack a see if you can hear your buddy glass mount ant are ****.
9 foot whip is best in car/truck 4 foot fiberglass cophased are next 4 foot are next mags are ok but over time and moving around they will mess up you paint

Jul 07, 2009 | Midland 1001Z 40-Channels Base CB Radio

1 Answer

Transmitting fine, not receiving an single thing..


the problem could still be with your swr . If your jeep is fiberglass at the point where your antenna connects that could be the problem. move it to a point where there is metal to get a good ground plane and you should hear people talking.

Apr 25, 2009 | Cobra 150 GTL DX Base CB Radio

2 Answers

Antenna


OUCH! Cb antennas are cut to a specific frequency. FM antennas are also cut to a specific frequency. If you ground the antenna to a frame, you short out the antenna. BAD THING. If it is a 102" whip, you would have to cut off about 2/3's of the whip to work. If there is a cylinder at the base of the antenna You would only need about 7' of the whip sticking out for it to work right. Inside the cylinder there is a coil that would make up for the missing length of a 102" whip. I would suggest finding an old CB with FM built in like one of the old SEARS CB/FM receivers.
They had the electronics built in to compensate for the varience in the old sets.

Jul 30, 2008 | Cobra 29 LTD CB Radio

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