Monday, September 12, 2011

Details On DTV Indoor Antenna Featured in August Pop'Comm

In pictorial form, here are details about the indoor DTV antenna - using coat hangers for elements and phasing lines - featured in the August 2011 edition of Pop'Comm. Elements are 16-inches in length, with a bend at the eight-inch point, forming a V shape.


Here is the completed antenna, showing phasing lines, elements, impedance
transformer and coaxial feedline to the DTV converter.


For an enlarged view, click on the images.




Simple wood screws and washers hold the phasing lines in place. A piece of insulation (blue) is used to keep the phasing lines from shorting where they cross one another.


An impedance transformer - available at RadioShack and Walmart - matches the antenna's 300-ohms to the coaxial line's 75 ohms.


Here's what the impedance transformer packaging looks like at Walmart.
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3 comments:

  1. sjOctober 6, 2011 at 1:10 PM

    This very same antenna ( and photo ? ) was done up in Popular Mechanics last winter . Nice antenna ; I made one. If you still have trouble with reception , I advise putting a sheet of
    aluminum foil on the ' back' side as an added
    reflector . Do not let it touch the elements .

    Steve , N0CRS

    ReplyDelete
  2. LouFebruary 17, 2012 at 8:25 PM

    Yeah, works great. I made one about a year ago as well.

    ReplyDelete
  3. varianJune 4, 2012 at 4:51 PM

    Hi,
    How far away can you pick up with it? What kind of parts do you need
    to get and how much does each cost? What measurement for the coat hanger and how
    far a part do they need to be to pick up uhf channels 65 miles and 100 mile ?
    What do the measurement have to be to pick up the higher vhf channels and what
    do the measurement need to be to pick up the lower vhf channels 65 miles and 100
    mile? Email me back with photos.


    Thanks,
    Varian

    ReplyDelete

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