Home Menu

Menu


RadioBanter » rec.radio.amateur » Antenna > rotator coax
 
 
LinkBack Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
  #6   Report Post  
Old August 2nd 09, 01:07 AM
Senior Member
  
First recorded activity by RadioBanter: Jun 2009
Posts: 155
Post
Quote:
Originally Posted by ml View Post
In article ,
"JB" wrote:

the coax is not stressed to much. The kind of coax with the foil under
the braid is NOT good for this loop.


John Passaneau W3JXP

Hi

Thank you very much for responding. was hoping more might respond
to what I thought was a fair question.

Interesting wonder why you don't recomend the foil type I guess the
extra flexing would damage it??

Yes. Not only does the foil shield break up, but the abrasion between the
dissimilar metals causes noise

Perhaps i can just find some double braided shield then...

A good 95% + shield like Belden 8214 or eq. foam type with stranded center
conductor is the best. Extra shields will complicate matters. If you have
multiple runs, the crosstalk between cables will me much less than the
antennas talking to each other anyway unless you have a lot of vertical
separation. It is good to use double shielding on duplexers and hardline on
fixed antennas. When going around a rotor, you will have maximum life if
you provide strain relief and broad loops like the remote broadcast trucks
do. The coax will go bad at the loop first. Another answer is to use
hardline up the tower and 8214 or RG-214 and N connectors for the rotor
jumper, and replace it occasionally. Of course the connectors must be
strain relieved, wrapped and well sealed to avoid any mechanical disturbance
or water intrusion.

thanks much for a ll the tips
You might want to check out Belden 9913F (flex) which is a low loss coaxial cable which very well at frequencies up to 1ghz.
N9ZAS.
Reply With QuoteReply With Quote
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes
Threaded Mode Threaded Mode

Posting Rules
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Will these rotator control boxes work? (was Can you help identify this rotator?) Rick (W-A-one-R-K-T) Antenna 2 August 13th 07 11:57 AM
FS: Coax Connectors, Adapters & Bulk Coax Cable AAA RF Products Swap 1 December 20th 06 03:13 AM
Coax To Coax Noise transfer ? Robert11 Antenna 2 March 18th 06 09:16 PM
Coax To Coax Noise Transfer ? Robert11 Shortwave 5 March 13th 06 10:05 PM
FS:RG8X 18 FT LENGTH COAX WITH COAX CONNECTOR Kb9igg Swap 0 October 31st 03 04:54 PM


All times are GMT +1. The time now is 11:10 PM.

Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright ©2004-2025 RadioBanter.
The comments are property of their posters.
 

About Us

"It's about Radio"

 

Contact Us RadioBanter forum home Privacy Statement
Copyright © 2017