Recent content by Jim Wyman

  1. Jim Wyman

    Attic mounting vs. roof mounting

    I suspect like most say.. 1090 MHZ is strictly line of sight.. Even with trees, you can get some blockage.... I suspect that the wood rafters/beams along with the 1/2 inch plywood with shingles on top is reducing the gain somewhat....
  2. Jim Wyman

    Attic mounting vs. roof mounting

    UPDATE: Placed the Spider in the attic with no amp no band pass, used very short antenna-> receiver run - horrible results..... Put CoCo back in place and results like before - 120 miles at best in one direction - mostly 80 nm range..... Conclusion: Spider did great on first floor with no...
  3. Jim Wyman

    Attic mounting vs. roof mounting

    Now I have to find a mounting solution for this thing....
  4. Jim Wyman

    Attic mounting vs. roof mounting

    Holy crap on a spider cracker! Just build a 1/2 wave spider and have it out my first floor window.... I am seeing stuff close to 60 miles with no height and no preamp/splitter in tow! Can't wait to get this thing up higher!
  5. Jim Wyman

    ADS-B DIY Antenna

    Just curious how a 1/4 wave on top would do as opposed to the 138mm whip portion.. this I would think would "balance" out the initial 68 mm feed... Jim
  6. Jim Wyman

    Attic mounting vs. roof mounting

    Mike, thanks for the tip. I guess I will go make spider and see if that improves things... Regards, JIm
  7. Jim Wyman

    Attic mounting vs. roof mounting

    Hello All, I am new here so forgive me if I miss something or appear "noobish"..... I an using Radarbox with a DIY collinear Coax (8-element, 1/4 whip on top) antenna in my attic, mounted right at the roof peak. My roof is ~ 25-30 ft in height and is made of wood and shingle (non- metallic)...
Top