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COXIAL TRAP DIPOLE For 7/18 MHZ - HQ VER.

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Uploaded by on Aug 10, 2009

My experience with Coxial Trap dipole antenna
Theoretical values do not work in practice,
I had to adjust the length of the antenna.
I had to reduce 44 cm length in the band 7MHz, SWR = 1.1on 7.065khz.,18mhz on the theoretical value was not changed, SWR= 1.6 on 18.000khz

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  • Muito bom, Parabéns.

  • BTW:) these type of traps do handle lots of power very well... Jimmy:)

  • I have built these type traps many times. I found that is you don't cover the coax with liquid electrical tape etc, the turns can move around and change the frequency of the trap. At that point they will really cause the antenna change SWR. I always used these in antennas that are coax fed and have a low swr when I am done " no tuner needed". Great traps, but do need to have something to keep the turns from moving till the epoxy, liquid tape etc sets up! Jimmy, ARRL TS, WX9DX

  • wtf is up with this song ! lol

  • What was the program you used for the trap calculatorr

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