1. You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
    Dismiss Notice

I made fire today!

Discussion in 'Amateur Radio Antennas' started by ButtFuzz, Nov 20, 2018.

  1. ButtFuzz

    ButtFuzz Anti-BS Advocate ● N4REV ● Reverend Doctor

    Joined:
    Aug 11, 2005
    Messages:
    486
    Likes Received:
    141
    [​IMG]

    I have not had good luck with a G5RV or similar design antenna. Burnt up a connector or two on those. So I went with a 40 meter - trapped 80 meter dipole. The feed point on the trapped dipole antenna kept getting water in it, and shorting or opening the circuit... causing nastiness.

    So this morning I got up and fashioned a new, supposed earthquake-proof feed point for this trapped dipole... then dropped the antenna, removed the errant parts, and soldered (yes, SOLDERED) the feed wire / feed point assembly to the legs of the dipole and hoisted it back into the air.



    Into the shack I go to test... at first everything A-OK. then, cranked up the power to 500 watts carrier... everything still A-OK. Then, the SWR starts going bananas, so I shut down quickly and made a decision to just pull the antenna for the winter... I have better things to do than fool with this problem right now.

    5 minutes later I go outside to take the antenna down, and smell fire... rubber, melty fire... hey! and someone is burning leaves! Hmmmm... walk around the back of the house and the feed point is down on the ground. The plastic parts are aflame, so something must have arc'd, gotten insanely hot and exceeded the flash point of the plastic feed point housing. Once on fire, it melted right through the Dacron support line and the whole affair came crashing to the ground... setting fire to the leaves!

    Stomped out the fire.

    Grumbled several expletives containing letters in the word "firetruck" and headed back inside... disgusted.
     
    #1 ButtFuzz, Nov 20, 2018
    Chevboy0167, Robb, undertaker and 1 other person like this.

  2. Low_Boy

    Low_Boy Well-Known Member

    Joined:
    Jan 21, 2010
    Messages:
    734
    Likes Received:
    215
    LoL.
     
    #2 Low_Boy, Nov 20, 2018
  3. Handy Andy

    Handy Andy Do Your Research First, Then Decide...

    Joined:
    Apr 23, 2018
    Messages:
    1,580
    Likes Received:
    1,299
    BFfire.jpg
     
    #3 Handy Andy, Nov 20, 2018
    ButtFuzz likes this.
  4. Captain Kilowatt

    Captain Kilowatt Professional Amateur
    Staff Member

    Joined:
    Apr 6, 2005
    Messages:
    15,120
    Likes Received:
    6,806
    That's REALLY strange. The feedpoint should be at a low voltage point with the ends being the part to worry about. Then again I suppose it depends what frequency you were operating on versus what the antenna was tuned too. Were you using a tuner at the time? I actually set fire to a Ten-Tec AT-227 tuner one time. Set the plastic toroid coil form on fire inside the case.
     
    #4 Captain Kilowatt, Nov 21, 2018
    BJ radionut and Robb like this.
  5. ButtFuzz

    ButtFuzz Anti-BS Advocate ● N4REV ● Reverend Doctor

    Joined:
    Aug 11, 2005
    Messages:
    486
    Likes Received:
    141

    No tuner... Just the Mighty Fine Junk 40- trapped 80 dipole. I removed the short little wires that are connected to the existing SO-239 in the "feedpoint", too.

    Errant Spider? Crappy antenna?

    The world may never know.

    I'm going to fashion a straight dipole for 3.865 for the winter and call it done.
     
    #5 ButtFuzz, Nov 21, 2018
    Last edited: Nov 21, 2018
    BJ radionut, kopcicle and Captain Kilowatt like this.
  6. BammBamm

    BammBamm Instigators ...173 on the southside.

    Joined:
    May 24, 2010
    Messages:
    575
    Likes Received:
    163
    Fire truck!
     
    #6 BammBamm, Nov 21, 2018
  7. kopcicle

    kopcicle Sr. Member

    Joined:
    Feb 17, 2016
    Messages:
    628
    Likes Received:
    619
    considered http://www.w8ji.com/windom_off_center_fed.htm ??
     
    #7 kopcicle, Nov 21, 2018
(You must log in or sign up to post here.)
: fire, really, aflame, melting, arcing, mad_powah!

Share This Page

Toggle Width

  • About Us

    The WorldwideDX Radio Forum was originally established in 2001. We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. We are working every day to make sure our community is the best Radio Hobbyist's site.

  • Like us on Facebook

  • Premium VIP Member

    The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. Care to buy us a beer? We'd really appreciate it!

    Donate to us!