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Thread: Resonate on one band only?

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  1. #1
    'Grumpy old bastid' kb2vxa's Avatar
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    Aug 2007
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    Lakewood, NJ
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    13,081
    So am IIIIIIIIIIIIIIIiiiiiiiiiiiiiiiiiii............

    I don't know how I missed this but I did, better late than never. I'm glad there was a follow up, I don't know why I overlooked a wonky load, the antenna. There's nothing like ceramic dog bone insulators for wire antennas, but these days they're expensive, and the stranded soft drawn 12ga bare wire I used back in the day seems to have disappeared and took ceramic open wire spreaders with it. Well not quite, I found groups of 4 at Surplus Sales of Nebraska, but enough to make a decent run of line would break the bank at Monte Carlo! I hate plastic and copperweld, but there's a chuckle in it, a goof on copper thieves. Oh yeah, I know those block type mica caps well, but I used them to repair the auxiliary loading in Johnson Valiants, Heathkit DX-100Bs and such transmitters.
    "The universe is under no obligation to make sense to you."
    Neil deGrasse Tyson

    73 de Warren KB2VXA
    Station powered by atomic energy, operator powered by natural gas.

  2. #2
    Master Navigator koØm's Avatar
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    Mar 2009
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    Queensgate
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    Quote Originally Posted by kb2vxa View Post
    So am IIIIIIIIIIIIIIIiiiiiiiiiiiiiiiiiii............
    The antenna is too efficient now; my "Flying Vee" Dipole (40 feet in elevation, with one leg running up 10 feet directly up the wall and over the operating position to the roof; that leg is about 30 feet in length. The other leg is about 35 feet in length, it is running parallel to and at the same height as the all wiring and CAT-5 in my apartment!) radiates now in such a way that, the RF gets into my computer that I use to run the sound card modes, eQSL and LoTW logs.

    Before, I only had this issue on 10 meters (coming thru the USB bus on the computer), the feed to the antenna was sloppy (75 ohm flat line TV antenna wire) and, one leg was, #16 gauge stranded wire with the mica block for an insulator. Now, it's feed is balanced properly with #12 spaced by dog-bones.

    All antenna wire is now, #15 formvar coated magnet wire.

    Nope, I cannot change the orientation of the legs, all equipment is grounded to the same point which (my third radiator) runs down three stories to a ground rod.


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