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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