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Larsen NMO-27-C testamonials?

Discussion in 'CB Antennas' started by Turbo T, Jul 22, 2012.

  1. Slowmover

    Slowmover Sr. Member

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    2127C8BC-DC4F-4E33-8F08-847610CB8EA8.jpeg



    Laird CB27

    .
     
    Eldorado828 likes this.

  2. Eldorado828

    Eldorado828 4-2-5 Amarillo Tx Standing By

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    That be the one, I think apart from the performance it looks good too
     
    Slowmover likes this.
  3. Blackcat630

    Blackcat630 Sr. Member

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    Has a slick commercial flair
     
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  4. Slowmover

    Slowmover Sr. Member

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    Needs a happy face? Disney logo?

    Unlike the menacing appearance of the tax-dollar-being-used-against-you Larsen?

    669BCACD-AB3C-465D-9FCB-0AA704CE06B0.jpeg

    Dog dish hubcaps on blackwall versus full covers with whitewalls? Biscayne versus Caprice? I6-250 versus V8-427?

    Hell, just mount a Rebel Flag Connex inside.

    (Quality of photo and final processing is the giveaway).
    .
     
    #49 Slowmover, Dec 18, 2019
    Last edited: Dec 18, 2019
  5. Recon

    Recon NY 881

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    The black Larsen base / coil arrived and I had to order the matching black mast separately.
    Maybe I will buy the Laird also so as to compare the Larsen, Laird and Browning BR-140-B.
     
    Slowmover likes this.
  6. Slowmover

    Slowmover Sr. Member

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    All black will be my choice as well. Or chrome film onto base plus polished whip. Hmmm
     
  7. Recon

    Recon NY 881

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    If a vinyl shrink-tube was applied to a polished chrome or stainless steel antenna, would the antenna still function?
     
  8. Blackcat630

    Blackcat630 Sr. Member

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    Sure it dont see why not. If your referring to what we call shrink wrap. I had a buddy that was worried about water getting in the joint 1/2 way up a vhf/uhf vertical base antenna. He shrink wrapped the entire thing from the radials to the top... worked fine.
     
  9. Recon

    Recon NY 881

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    Yes, I am referring to the material used by electricians to cover a spliced wire connection. A heat gun / hair dryer is used to apply the shrink tubing / sleeve. For the folks (like me) who don't like the chrome bases on mobile antennas, the coil / base can be covered with the black shrink tubing.
     
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  10. Recon

    Recon NY 881

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    The instruction / guide sheet with the Larsen was a good "guide" for trimming the antenna for 27Mhz. The antenna was 49" long and the instruction sheet recommended a length of 47" for a roof mount installation without a spring and a length of 46-1/4" with a spring. Being that the antenna is attached to a Third Brake Light Antenna Adapter, I wouldn't consider the antenna to be classified as a "roof mount" installation. Starting with the original 49" long antenna, I trimmed-off 1/2" pieces until the SWR was down to 3 and then I trimmed-off 1/4" pieces until the SWR was below 1.3 on all channels, being 1.3 is on Ch. 40, 1.1 on Ch. 1 and 1.2 on Ch. 20. I'm done! Final length is 46-1/4".
    Next task is to compare the transmit and receive of the Larsen and the Browning BR-140-B.
     
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  11. Recon

    Recon NY 881

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    The length of the Larsen was also 49" and after trimming-off pieces to obtain a 1.1 to 1.3 SWR, the final length is now 46-1/4" and the final length of the Browning BR-140-B is 46-1/8".
     
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  12. undertaker

    undertaker Undertaker

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    Now I know why mine would not tune!!! Guess im gonna have to do some trimming
     
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  13. Recon

    Recon NY 881

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    The "trim chart" which came with the Larsen has a roof-top mounted NMO27B / NMO27C having a trimmed length of 47" without a spring and 46-1/4" with a spring for 27 Mhz. I do not have a spring and the SWR is great at 46-1/4". Go figure! My first cut was 1". I had to remove the black paint / coating to ensure the antenna was fully inserted into the socket before checking the SWR. I don't know if it makes any difference, but I always file the cut-end as flat as possible after I cut the antenna with pliers so as to get that warm and fuzzy feeling that the bottom of the antenna makes good contact with the socket.
     
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  14. Recon

    Recon NY 881

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    As per Larsen's Trim Chart, the operating range for the NMO30 is 30.0 MHz to 35.0 MHz with antenna lengths from 35-1/4" to 51-9/16". What is the length of your antenna with the NMO30 coil? I am curious if all coils are the same and only the antenna length is different.
     
    Slowmover likes this.
  15. Slowmover

    Slowmover Sr. Member

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    Save the file.

    Given the picture posted of, Recon’s Dog, I’d imagine that son-of-a-biscuit could make it shark-bite clean.

    .
     

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