[TowerTalk] Questions

[john at kk9a.com]

For me 1dB loss is huge but everyone had their own criteria. For cable
leads that flex, I use Belden 8267. I have no experience with the DXE
cable. 

GL, 

John KK9A 

On 2016-08-31 10:24, Julio Peralta wrote: 

> Thanks for the comments. 
> 
> Because more than 100 feet of the 270 foot run will be up a crank up tower I
> don't think the loss savings in 150 feet of hard line which I think will be
> less than 1dB is worth the extra cost and trouble. I currently run the coax
> from the operating position over the roof to the tower which is the shortest
> route. I would probably have to run the hardline on the ground all the way
> around the house which would almost double the length of the run to reach
> the tower. Not worth the cost and problems in my opinion.
> 
> What I was really asking was if anyone had any experience with the DXE
> 400MAX cable since it cost less and has the same specs as most of the other
> LMR-400 type cables. However no one has responded with any comments either
> positive or negative about 400MAX.
> 
> Nor has anyone commented on the availability of replacement sheaves for UST
> crank-ups.
> 
> Julio, W4HY
> 
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces at contesting.com] On Behalf Of
> john at kk9a.com
> Sent: Wednesday, August 31, 2016 8:29 AM
> To: towertalk at contesting.com
> Subject: Re: [TowerTalk] Questions
> 
> I concur that using the same cable from the radio to the antenna 270 feet
> away is a poor choice. Some cables are flexible and some have lower losses.
> I was going to make a similar suggestion when I initially read the post. I
> have many very different cables going from the shack to the antenna.
> 
> It sounds like your stacking relays are mounted up the tower. While
> slightly more costly to install, I think that they are better at ground
> level. It is much easier to check for individual antenna problems and relay
> issues while standing on the ground.
> 
> John KK9A
> 
> To: <towertalk at contesting.com>
> Subject: Re: [TowerTalk] Questions
> From: "Ed Sawyer" <sawyered at earthlink.net>
> Reply-to: sawyered at earthlink.net
> Date: Wed, 31 Aug 2016 01:23:52 -0400
> 
> I think it's a mistake to run the same cable for 270ft for this application.
> I would run the lowest loss you can afford for the main run - LDF4 or LMR600
> and then shift to a more flexible cable at the tower - LMR400flex or worst
> case RG213.
> 
> I run 3 sets of coaxes for my systems. LDF5 from the shack to the switching
> at the towers. LDF4 from there to the stack matches and them LMR400flex
> from the stack matches to the beams.
> 
> Ed N1UR
> 
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> 
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