Towertalk
[Top] [All Lists]

Re: [TowerTalk] [Bulk] Re: LMR600 up to the top of tower ?

To: Drax Felton <draxfelton@gmail.com>, towertalk@contesting.com
Subject: Re: [TowerTalk] [Bulk] Re: LMR600 up to the top of tower ?
From: Grant Saviers <grants2@pacbell.net>
Date: Sat, 01 Aug 2015 06:56:13 -0700
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
An interesting idea. What steel rope are you using? Since the hardline easily has the strength to self support off a Kellem 90' of itself, does the wire rope somehow cause the hardline to coil? How frequently does your tower go up and down?

I always figure 8 flake my cables on raising/lowering my HDX589s to avoid the twist a circular loop puts into them and thought that might work with hardline for a limited number of up/down cycles before it failed. I have loop guides at each section top. The cable bundle is stiff enough there isn't much wind movement.

Grant KZ1W

On 7/31/2015 20:24 PM, Drax Felton wrote:
I do this with 1/2 hardline runs.   I wound a helix of steel rope around the 
bundle and let it take the weight and cinch on the cables all the way down.   
Lowering the 90 tower just causes the hardline to form big loops on the ground.
Tie down a length of it to an arm at the top so the cable connectors don't flex 
and its held away from the tower.
Then use a turnbuckle on the steel rope at the bottom to keep it from swinging 
in the wind.


Sent from Outlook




On Fri, Jul 31, 2015 at 5:43 PM -0700, "Robert Harmon" <k6uj@pacbell.net> wrote:











I have a 380 foot coax run to the top section of my motorized tower when it is 
fully extended.

I am changing out all my old RG213 and thinking of saving a few db by going to 
LMR600 up to the top section then
LMR400UF up from there for the rotor loop and up to the 40 meter beam and 
triband/warc beam on the mast.
What do you think of LMR600 for this run from the shack up to the top section 
for a motorized tower ?
When I lower the tower I am thinking I could coil the LMR600 into maybe 5 foot 
diameter coils on the ground.
BTW the tower is 90 feet to the top of the top section when all the way up.
Is this a bad idea ?  (I am hoping to avoid the cost of the flex LMR600UF if I 
can.)
A side issue is I understand I have to be very careful not to nick the copper 
clad on the center conductor
when installing a connector on the non flex LMR600.   I would use the Davis 
PL259 connectors for LMR600.   Anyway maybe this usage of the
LMR600 is not a good idea, what do you think ?

Bob
K6UJ
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>
  • Re: [TowerTalk] [Bulk] Re: LMR600 up to the top of tower ?, Grant Saviers <=