Smallest CB?

Discussion in 'CB & Scanner Discussion' started by THX1138, Feb 6, 2018.

  1. tphank1

    tphank1 ... Advanced User Acceptus Premium Member

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    Nice. The veil on your plate looks reaaaaly dark!
     
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  2. RadarScout

    RadarScout Premium Member Advanced User Premium Member

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    Be sure and match the SWR with your antenna. If you don't know how, some truck stops have CB techs that can do it. Or, you could find a CB shop.
     
  3. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    Yes this is important on the majority of Antennas to 1) prevent TX RF from folding back into the Receiver and 2) to keep from burning out the TX finals by loading up the feed line. BUT having said that, the small President Antenna is fixed with no means to adjust its VSWR and has a factory 1.1:1 match. So if one buys a fixed antenna that the VSWR can not be adjusted on, do not Transmit on it outside of the published band because the further out of band it goes the higher the VSWR will climb. With an antenna as short as the President, this will happen quickly. The President can only handle going 20 channels below and 20 channels above the 11 Meter CB Band. The President's VSWR is factory adjusted being centered on CB Channel 20.

    Where as a properly tuned Wilson 1000 can be centered to be an almost perfect match at center and only a 1.25:1 at the top of 10 Meter and 1.6:1 at the bottom of 12 Meters which is OK. The reason for the unevenness is that the Wilson 1000 is a load 1/4 wave because the whip is not actually 108 inched but is electrically loaded using a coil to electrical "equal" 110 inches. The 1/4 wave whip on 12 Meters is 120 inches and the Wilson is not electrically designed to simulate that where as 10 Meters at 102 inches even though not perfectly matched with the coil size, the fixed whip size is a longer electrical length for the higher frequencies of the 10M band. Additionally the CB Band does not fall in the center of the 11M band but near the top close to where 10M band starts. Anything above 2:1 it is seriously worth looking for the problem because above 2:1 the actual amount of forward RF (transmitted signal actually leaving the antenna starts seriously dropping and one is backloading the feed line with wasted TX power. 4:1 only use in an emergency and 6:1 one will lose ones Finals or Receiver in due course if transmitting.
     
  4. RadarScout

    RadarScout Premium Member Advanced User Premium Member

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    @Transporter I wouldn't run SWR any higher than 1:80. Anything higher and things may start acting quirky. I use the Wilson 5000 with a silver coil. It is a beast.
     
  5. Deacon

    Deacon TXCTG Advanced User Premium Member

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    If it were possible to actually achieve a consistent installed SWR from the factory, you wouldn’t need to tune it. It would still be valuable to figure out where you’re actually sitting installed.
     
  6. bslaws

    bslaws I believe the name says it all! Intermediate User Premium Member

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    I have a Wilison "Lil Will", it's a POS. SWR not even close and need to lengthen it to get proper SWR with no adjustment left. Very low DB gain, lucky to hear trucks that are 1 mile away in flat open terrain. Need to get a proper antenna but not sure how to mount on my company Chevy Equinox.
    IMG_4047.JPG
     
  7. sdrawkcab

    sdrawkcab sdrawkcaB|Backwards Beginner User Premium Member

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    Do they make any with a trunk lip mount, or can you buy the antenna as an NMO base and get an NMO trunk lip mount for it?


    Written from my mobile device.
     
  8. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    It is perfectly OK to run a 2:0, one is not hurting anything, one is just losing actual radiated power (Forward RF) one doesn't need to waste as heat by simply doing a little investigating. What most people don't understand is that VSWR is more then just a correctly tuned to center frequency antenna, true SWR is ones whole transmit system after the finals (output connector, all jumpers and coax, antenna mount, antenna, and ground plane).

    I like the Wilson 5000, it is a great antenna. The Wilson 5000, Trucker 5000, and Wilson 1000 all have solid copper silver plated loading coils. All three of these antennas have the highest Q of any mobile 11 Meter antenna.
     
  9. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    Not even remotely true. The main reason CB radio Antennas are not fixed is because of shipping requirements and not knowing for sure where the user needs to match his center frequency to (why limit your sales to 11 Meters only when Hams love to use your product also meaning one needs to be able to tune the antenna because the CB Band is at the far end of the 11M band as far from the 10M band as it could be, which requires the need for tuning to be used on 10M). Even the vast majority of Amateur Radio 900MHz, 1.2 GHz, and higher antennas are fixed when basically every ham knows how to tune an antenna.

    Every single one of our stacked 5/8 wave 900MHz wireless data network antennas come with a 1.1:1 match and no way to adjust it plus they all test at 1.1:1 or we send them back. They are made to cover our allowed FCC Frequency band and are dead on at our center freq.

    The same thing is going on with the President, it is an antenna designed for a specific frequency range, a specific center, has a permanent attached coax (part of the antenna system), is not adjustable, requires a specific type mount to achieve that VSWR (one needs to break through the paint on the underside of the trunk deck lid with the mounting screws to get a correct match).

    The main reasons the K40 and Wilson antennas are tunable and HAVE to be tuned is first for shipping and display packaging which do NOT include the whip and because many are used on both 10 and 11 Meters. The Wilson 1000 makes an excellent 10 Meter vehicle mobile antenna especially by removing some of the whips length to get a great center freq match.
     
  10. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    Backwards are you asking if the Lil Wilson comes in a truck mount configuration? The answer is no, it only comes one way, the mag mount and the antenna does not screw off the base as the 1000 and 5000 do.

    But the Wilson 1000 has a trunk lid mount available. That comes with a 62 inch whip and is a killer truck mount antenna and would be stealthier then a Wilson 1000 mag mount on the roof IE lower. Plus the antenna would be removable, you put the cap over the antenna mount point and put the antenna in your trunk when not needed.
     
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  11. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    If you can't hear a trucker at over a mile, the coil in the Lil Wilson is damaged/bad, you have damaged the coax, or you radio's receiver is junk, just the facts. It is NOT the fact that the antenna is a Lil Wilson! An SWR match has nothing to do with receive except at that specific frequency where the antenna is specifically tuned to the channel one is receiving on as there will be slightly better receive and rejection but you will never hear the difference. So if splitting the adjustment distance in half and locking the whip down, you can't hear a trucker more then a mile off, again it can only be one of three things, bad radio, damaged coax, or damaged/bad loading coil for SWR doesn't matter because you are NOT transmitting and the antenna in question is specifically designed for the frequencies you are receiving on.

    I have probably sold over 500 Lil Wilsons since they came out and actually installed at least 100 without a single matching problem. The biggest issues I have run into after install are from people putting a piece of shammy or additional teflon sheet on the magnet ruining the connection with the roof. Second is passing the Coax though a door that gets used all the time in a place that crushes the feed line making a match impossible. Next is people shorting the coax and putting a new PL-259 on the feed line. Lastly are issues with the overall install like lack of good ground, tight coax bends to shove the radio in some cubby hole, etc . . .

    Next, no quarter wave antenna made anywhere has ANY gain, not even a true 108 inch whip much less some electrically loaded 1/4 wave. It is impossible to build a 1/4 wave antenna with gain. The first mobile antenna with any gain is a 5/8 wave with a proper ground plane. Properly electrically loaded to make it as short as possible yet maintain 4.5 dB of gain it is 7 feet tall and must have a proper ground plane (not a fiberglass truck cab). Just attaching an antenna and feed line to a transmitter one loses almost 3dB right out of the gate because of the SO-239 & PL-259 connectors, feed line, and antenna. Add a jumper and inline SWR/Power Meter lose another 3dB, last add a linear and its required jumpers is a 3dB hit so better make sure that foot warmer has decent gain when it is operating or one is just wasting ones time. Which are all reasons for running an RCI-2970 or bigger radio as that is only one single connection and I installed a female N connector on the back of my 2970 and removed my PL-259 soldering a male N connector to the Wilson feed line (loss only 0.2dB).
     
  12. ALS

    ALS PSL +5 Intermediate User

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    I'm pretty sure Wilson discontinued the trunk lip mount. Mine corroded and I had to find a new lip mount to screw my Wilson Antenna on to.

    They may still be available I just couldn't find one in stock anywhere when I needed one a few months ago.
     
    Last edited: Jul 15, 2018 at 9:16 PM
  13. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    I still have two or three in stock and they show currently available for me to order more stock. The one on my sister's 2005 Jetta is doing fine. Could the dealer you normally use have stopped stocking them?
     
  14. ALS

    ALS PSL +5 Intermediate User

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    I tried a number of suppliers and no one had them it stock and they hadn't seen one available for a over a year. I just did a quick search and a place called Cooper Electronics is showing that they were discontinued.
     
  15. Transporter

    Transporter ModWight Transporter Beginner User Premium Member

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    And that means exactly what, that they are no longer carrying them! I can order them and I have checked 5 other web sites I can order them from.

    s8144.americommerce.com: Clays Radio Shop - Shopping Cart
     
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  16. RadarScout

    RadarScout Premium Member Advanced User Premium Member

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    Yeah, Copper's is a big mail order CB store. Sometimes if they don't sell an item very often, they'll stop ordering that item.
     
  17. ALS

    ALS PSL +5 Intermediate User

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    Thanks, it just seemed no one was carrying them anymore. I had to go with a NMO unit and an adapter to screw my Wilson 1000 onto.

    I'm going to order another one this week. The Coax Wilson uses is RG8X verses standard RG8 I have no idea if it makes a difference running 4-5 watts it just makes me feel better having the thicker wire.
     
  18. RadarScout

    RadarScout Premium Member Advanced User Premium Member

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    Go with heliax. You could run 20,000 watts through that...LOL