Ham Radio - An end fed folded dipole experiment. Part 1, the idea and design.

Discussion in 'Amateur Radio News' started by KB7TBT, Jul 7, 2019.

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  1. AB8MA

    AB8MA Premium Subscriber QRZ Page

    I am working on grunt DXCC. I started on June 11 of this year. So far, I have 76 entities confirmed.

    Please, no comments from the anti-grunt police. :)
     
  2. AB7E

    AB7E Ham Member QRZ Page

    No, it is most certainly NOT a folded unipole. A folded unipole is fed on one side of the folded element against a groundplane, radial field, or counterpoise. That is not what he has here ... he has no counterpoise. A folded unipole is fed against the counterpoise on one side only, with the other side connected directly to the counterpoise.

    He is simply feeding the end of a shorted half wavelength of feedline, and it will not work at all.
     
    AF4RK likes this.
  3. W4HM

    W4HM XML Subscriber QRZ Page

    I use bean gas but have to watch that it doesn't light or I'd be sending "spark" mode which is illegal to use now.:D
     
  4. W4HM

    W4HM XML Subscriber QRZ Page

    I used an end fed wire in a second floor apartment in the San Francisco bay area. I used 66 feet of wire strung outside between two apartment windows. I built a parallel network tuner and used the antenna on 40-10 meters with really good results.
     
    WN1MB likes this.
  5. KA1JY

    KA1JY XML Subscriber QRZ Page

    You want to use "a convention"? I thought our progressive overlords tossed out all that evil labeling and naming? Z is the new gender neutral pronoun- not the inverse of admittance. Y? Because Z said so.
     
    WN1MB likes this.
  6. AF4RK

    AF4RK Ham Member QRZ Page

    Really good results? So you made a contact. Someone Worked All Continents on a light bulb. I have a 3 element beam on 20 meters and a 40 meter dipole at 50'. I make 800 contacts in a contest weekend and that isn't even considered good.
    The reason that just about any antenna will "work" is that it's really hard to make a good dummy load.
    AF4RK
     
    AB7E likes this.
  7. KW2KW

    KW2KW Ham Member QRZ Page

    All antennas are dipoles. "Dipole" is the prefix "di-", meaning "two", plus "pole", thus "two poles". Nothing there says the poles have to be equal, only that there are two of them. An off-center-fed dipole is not a Windom, which is a single-wire-fed Marconi antenna. An "end-fed" is a dipole where the second pole is ground or a counterpoise such as the feedline shield.

    In summary, all antennas have two poles, so all are dipoles.

    Keep studying.
     
  8. AB7E

    AB7E Ham Member QRZ Page

    Now THAT should go on a billboard. Excellent comment! Gave me a chuckle as well.
     

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