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

To: "'Gedas'" <w8bya@mchsi.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] Skinny QRO coax jumpers for station interconnection
From: "N2TK, Tony" <tony.kaz@verizon.net>
Date: Fri, 16 Mar 2018 14:47:06 -0400
List-post: <mailto:towertalk@contesting.com>
Tnx Gedas. Yeah, want to make sure it is the good stuff I get.

N2TK, Tony

 

From: Gedas [mailto:w8bya@mchsi.com] 
Sent: Friday, March 16, 2018 2:29 PM
To: N2TK, Tony <tony.kaz@verizon.net>; towertalk@contesting.com
Subject: Re: [TowerTalk] Skinny QRO coax jumpers for station interconnection

 

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 <mailto: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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