[TowerTalk] Coax

[Roger (K8RI)]

K7LXC at aol.com wrote:
>  
> In a message dated 7/22/2008 9:02:43 A.M. Pacific Daylight Time,  
> towertalk-request at contesting.com writes:
>
>   
>>  Bend radiis for coax is best if kept at 40X times  O.D.
>>     
>  
>     So for RG-8 the minimum bending radius is 20  inches?!? I don't think so. 
> As I recall, the multiple is 6, giving you a 3"  radius. It's higher for 
>   
That's about the minimum bend radius for LMR-600.  However that is 
different from the "repeatable" bend radius.  If you bend it and the 
stuff takes a set. IOW it doesn't try to straighten out, it'll stay that 
way even with heat.  The LMR series have very short/small bend 
radiuses.  However the repeatable bend radius if much larger.
> Andrew Heliax and other high grade coaxes but I don't  recall the specifics. 
>   
Heliax has a different problem. The jacket will buckle if too small a 
radius is attempted.  Then there's the really big stuff <:-))

Roger (K8RI - ARRL Life Member)
www.rogerhalstead.com
N833R (World's oldest Debonair)