preps
Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

Thread: Really Long Coax Run

  1. #11
    Join Date
    Apr 2013
    Location
    Louisville, KY
    Posts
    190
    Thanks
    12
    Thanked 209 Times in 95 Posts
    Downloads
    26
    Uploads
    0
    Maybe you should just rig up a repeater for yourself. transmit with low power to your tower of high power!
    All answers are opinions and may, or may not be technically correct.

  2. #12
    Join Date
    Dec 2011
    Location
    RICHMOND VA.
    Posts
    628
    Thanks
    357
    Thanked 228 Times in 147 Posts
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by 222DBFL View Post
    It is some near stuff. They are building DAS (distributed antenna systems) in stadiums and hotel natonionwide that the antennas are light being feed by fiber. Cool stuff , they turn RF into light through duplexers and a major fiber network. Helped build the largest one in the US at the super dome in LA. Wish I would have taken photos!!!!
    pics would be sweet .
    soooooo ... the velocity factor of fiber optic coax/feedline should be somewhere between 100 and 99.999 ?

  3. #13
    Join Date
    Jul 2013
    Location
    Port Orange. FL
    Posts
    1,135
    Thanks
    299
    Thanked 405 Times in 268 Posts
    Downloads
    0
    Uploads
    0
    It's fast as light!! Losses are very low, normally under .5db with a fiber tester. This is through the entire system. The technology is here, and there is more to come!! The days of pulling in long coax runs up the tower are now becoming a thing of the past. Good and bad!! Less work in the end, but less time to complete the job as well.

  4. #14
    Join Date
    Jan 2013
    Location
    NEW YORK, Long Island
    Posts
    429
    Thanks
    31
    Thanked 139 Times in 95 Posts
    Downloads
    0
    Uploads
    0
    Times Microwave LMR-400, from MPD DIGITAL Company directly on the web This hobby can get expensive, but you want to do right and only once. Buy in bulk rolls to save money. "It Cost Money To Run With The Best" Sure you can do cheaper but will you get the same results "NO"
    Last edited by NY714; 07-05-2014 at 04:17 PM.
    RCI-2950DX, 1978 Cobra 148 GTL Taiwan, SHURE526T MIC, Tug-8 With Astatic 10 DA Head, Astatic 575M6, ASTRON 70/20 AMP POWER SUPPLIES, IMAX 2000 W GROUND PLANE KIT. TIMES MICROWAVE LMR-400 COAX, RF CHOKES. DIAMOND SWR/POWER INLINE METER. 250 of Sea Level Under Me. Recent World Radio Member.

  5. The Following User Says Thank You to NY714 For This Useful Post:

    stang (07-06-2014)

  6. #15
    Join Date
    Feb 2014
    Location
    West coast
    Posts
    124
    Thanks
    0
    Thanked 96 Times in 55 Posts
    Downloads
    0
    Uploads
    0
    My first thought would be a long wire and balun. Is the hillsides on both sides clear of any other utilities?? If there are no obstructions, some light wire and a bow and arrow would give you coverage. Multiple wires could even be used, only two at a time, to get the coverage that works best. I use this method in the woods and directional arrays are possible. I use very fine wire, but a little heavier would be best for longer exposures.

  7. The Following User Says Thank You to mjd420nova For This Useful Post:

    BOOTY MONSTER (07-10-2014)

  8. #16
    Join Date
    Dec 2011
    Location
    RICHMOND VA.
    Posts
    628
    Thanks
    357
    Thanked 228 Times in 147 Posts
    Downloads
    0
    Uploads
    0
    Quote Originally Posted by Gerowen View Post
    .......he wants to run coax up the side of the hill for about 450 feet. .....
    even with lmr-400 that's almost 1 s-unit (4-4 1/2 db) of signal loss on both tx and rx . about 1/3 of your tx power will reach the antenna .... the majority 2/3 of your tx power will be lost in the coax run .

    soooo .... spend $500ish and lose contacts for less effort...
    or
    spend a quarter of that with more install effort for much less loss/more power reaching the antenna keeping most of the systems ERP .

  9. #17
    Join Date
    Jul 2013
    Location
    Port Orange. FL
    Posts
    1,135
    Thanks
    299
    Thanked 405 Times in 268 Posts
    Downloads
    0
    Uploads
    0
    He needs some LDF4-50a or similar. The larger the better. 7/8" coax would work as well. But at 450 ft. You are taking about a bit of money. Not going to be cheap that's for sure!!

  10. #18
    Join Date
    Aug 2012
    Location
    pa
    Posts
    47
    Thanks
    13
    Thanked 18 Times in 11 Posts
    Downloads
    0
    Uploads
    0
    get a starduster m400 mount it as high as possible next to home , and use lmr 400 coax . this antenna will
    help him get out of valley better and no need for 450 feet of coax thats just insane
    base-AR3500 ,palamar 250,d104 w/ 10da head ,sirio 2016,ll400 coax
    mobile-s.s. 3900, sirio z180 , astatic 636S.E

  11. The Following 2 Users Say Thank You to hotrod For This Useful Post:

    222DBFL (07-22-2014), BOOTY MONSTER (07-22-2014)

Visitors found this page by searching for

None

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •