2m/70cm antenna for my RV with a rubber roof (no ground plane)

Discussion in 'On the Road' started by KC9OO, Jul 18, 2017.

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  1. VE3DDL

    VE3DDL Ham Member QRZ Page

    do not foget 13ft 6in to top must brigdes
    K5BBC likes this.
  2. KD4NFS

    KD4NFS Ham Member QRZ Page

    i hace a class c, about 30 ft long, and about 11 feet high. the standard size i guess. i have 3 antennas mounted on the ladder. a tarheel screwdriver, and two (2) jetstream jt-82b. ive tore off all 3 antennas. had the best luck using a tarheel 2. tunes up good, it seems to work. now the jt-82b...high swr, and i cant seem to get them down. tried a old cb whip cut down to about 78 inches. fine on 2 meters but not on 70cm. the jt-82b is about 17 inches long. any longer and its a battle with the trees. the trees usually win. i cant say for sure what will work. ive even tried to mounting antennas to the front fenders. no joy. high swr. the ladder is grounded well also. im open to suggestions. thanks
  3. KN7S

    KN7S Senior Swapmeet Moderator Volunteer Moderator QRZ Page

    I don't know if this would work on your RV or not, but for decades I have used Diamond X-50's and X-30's with very good luck on several fiberglass boats. Since they use counterpoises there is no pressing need for a ground. Boats are pretty much all fiberglass so being able to ground you antenna is kinda hard. These antennas also hold up very well in the salt air marine environment.
    Last edited: Jun 12, 2018
  4. WA7PRC

    WA7PRC Ham Member QRZ Page

    When I installed 2-way radios (mostly CB) into cars/trucks/RVs in the 1980s, I used 2" wide aluminum tape w/ adhesive on the back. I laid it down in the form of an "X" under the antenna mount. I bought it from the local hardware/lumber emporium. I see it's still available from the big box stores for cheep.

    Another technique I saw a friend use on his Corvette was to "wallpaper" the (inside) surface w/ aluminum foil. He secured it using spray adhesive. On the outside, you'd probably want to use thicker foil (or thin sheet), and coat the surface to protect it from oxidation/damage.

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