Re: [TowerTalk] Skinny QRO coax jumpers for station interconnection

[Gedas <w8bya@mchsi.com>]

Hi Tony. Harbour Industries is a HUGE leader in the world of high-temp, 
quality Teflon cables and wires etc. They are the ones who make my 
RG-142. I personally would stay away from buying cables and assemblies 
from Asia _unless_ you knew exactly who you were dealing with and had 
some assurance of the quality cables you would be getting from them. 
Several people here have suggested a couple real good USA sources and I 
would look into them if I were you. I just make my own here but that is 
because I have plenty of cable around.
Gedas, W8BYA

Gallery at http://w8bya.com
Light travels faster than sound....
This is why some people appear bright until you hear them speak.

On 3/16/2018 2:20 PM, N2TK, Tony wrote:
> Gedas,
> Tnx for the info.
> Looking on eBay I see several listings for RG400 from China. I had heard 
> Harbour Industries in VT makes a high quality cable. Not sure about the stiff 
> from China.,
> N2TK, Tony
>
> -----Original Message-----
> From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Gedas
> Sent: Friday, March 16, 2018 2:13 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] Skinny QRO coax jumpers for station interconnection
>
> RG-303 is a good cable but not as good as RG-400 or RG-142 because it uses only 
> a single shield.  Also, I would still use RG-400 over RG-213 because it meets 
> his desire for a small O.D. cable and because he is using it for switching 
> filters etc where the higher shielding effectiveness of the RG-400 is desirable 
> and will offer better immunity to cross talk etc.
>
> Plus, with a Teflon based coax you never have to worry about the center conductor 
> migrating from center, even under QRO and extreme heat and tight bends.  I was 
> biased when I posted using RG-142 because I was lucky enough to find a 1000' roll 
> of it and have been using it for jumpers for years & years. But RG-400 is more 
> flexible and of the same high quality as 142.
>
> It used to be that RG-213 meant an upgraded quality version of a cable like RG-8 
> (solid dielectric & VF = 0.66) but with two copper braids vs.
> one. RG-214 was the same as RG-213 but used a silver coated copper center conductor 
> and dual silver coated copper braids for even higher performance and better S.E.  
> For MIL applications we used lots of RG-223, RG-142, RG-400, RG-214, and of course 
> tons of semi-rigid. I was very, very lucky when I was able to purchase five 
> left-over 1000' rolls of new RG-214 for, you don't want to know, and have enjoyed 
> giving most of it away to friends & family.
>
> Gedas, W8BYA
>
> Gallery at http://w8bya.com
> Light travels faster than sound....
> This is why some people appear bright until you hear them speak.
>
> On 3/16/2018 1:33 PM, Rob Atkinson wrote:
> > I see no mention of RG 303 and wonder if that's been discontinued.
> >
> > for jumpers I'd use 213.  If you need a tighter bend radius I'd
> > re-arrange or re-locate the connection points instead of using skinny
> > silver coax.
> >
> > Rob
> > K5UJ
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