YI1SAL Put a new antenna

Discussion in 'General Announcements' started by YI3WHR, Oct 14, 2018.

ad: L-HROutlet
ad: l-rl
ad: L-MFJ
ad: l-assoc
ad: Left-2
ad: Subscribe
ad: Left-3
ad: MessiPaoloni-1
  1. YI3WHR

    YI3WHR XML Subscriber QRZ Page

    Hi all .... here we have new good news ...
    Salam YI1SAL from Iraq now have anew antenna ... a 3 elements 3 band yagi
    and he is now putting a god signal on north america regarding the bad propagation ... he is mostly doing FT8
    hope you find this interesting ...
    regards
    wahhab yi3whr

    [​IMG]

    [​IMG]
     
    G3ZPF, AL4Y, WB5THT and 3 others like this.
  2. W4WTS

    W4WTS Premium Subscriber QRZ Page

    Great news! Hope you get a chance to do some SSB!
     
  3. R3LO

    R3LO Ham Member QRZ Page

    Hi Wahhab. Thank you for FT8 QSO! 73!
     
  4. WB5THT

    WB5THT Ham Member QRZ Page

    Great!
     
  5. N9RMA

    N9RMA Ham Member QRZ Page

    WOW what a tower...…… Is that homemade? Bob N9RMA
     
  6. KI4AX

    KI4AX Ham Member QRZ Page

    The tower needs a few diagonal members to make the structure more rigid.

    Dan KI4AX
     
  7. G3ZPF

    G3ZPF Subscriber QRZ Page

    I am loving the homebrew tower.

    Personally I'd like to see some diagonal bracing but providing the joints are secure enough to act as rigid connections & not pinned joints the structure could be acting as a vertical vierendeel girder.

    [​IMG]
     
  8. KI4AX

    KI4AX Ham Member QRZ Page

    This is true... But, Vierendeel Girders (usually) require larger chord members to resist the bending moments.

    But hey, if YI3WHR is happy with it then I'm happy for him. Nothing better than a tower and directional antenna for working that DX. Great addition to your station...

    Dan KI4AX
     
  9. G3ZPF

    G3ZPF Subscriber QRZ Page

    "...Vierendeel Girders (usually) require larger chord members..."

    Yes, you're right. They also need definitely rigid connections, not just sort-of rigid :)

    But if that tower is just 20ft scaffold poles for the lower section and what looks like another 10ft on top then I think he'll get away with it providing the joints are checked regularly. Its quite a chunky design.

    Having been a structural engineer for the early part of my life I always said that if I ever got to the point where I had a garden big enough to put up a 60ft tower it would be 61ft from anything else in all directions :)

    But you have to admire anybody who builds a tower just from material he has to hand. Nice going Wahhab.
     
    Last edited: Nov 19, 2018 at 9:26 PM

Share This Page