[TowerTalk] hardline bending radius

[K1TTT]

The 1/2" stuff I have used could be bent pretty tight, I wouldn't go much
less than 1' radius though without proper tools.  With proper bending jigs
you could probably get it much tighter without kinks.

David Robbins K1TTT
e-mail: mailto:k1ttt at arrl.net
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-----Original Message-----
From: Jim Lux [mailto:jimlux at earthlink.net] 
Sent: Saturday, November 17, 2012 15:58
To: towertalk at contesting.com
Subject: Re: [TowerTalk] hardline bending radius

On 11/16/12 9:21 AM, Hans Hammarquist wrote:
> Does anyone have a good idea of minimum bending radius for the 1/2 inch
cable TV hardline? I have been told anything from 5" to 50". I believe 5" is
way  too sharp but 50"??? I sure that 50" would not cause any problems with
the cable but ...
>

Like Andrew LDF Heliax?  5" is the min bending radius..

The thing to remember is not so much the bend radius, but, rather, you only
get to bend it once.  Each time you bend it, it work hardens the copper a
bit, leading to cracks, etc.

Also, if you're going to bend it that tight, you need some sort of mandrel
or bending jig to support it.  Think of bending copper tubing or electrical
conduit. (in fact, a conduit bender might work real well for this
application)

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