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RG 400 vs RG 142 vs Rg 58

 
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bakerocb



Joined: 15 Jan 2006
Posts: 616
Location: FAIRFAX VA

PostPosted: Sun May 13, 2007 3:58 pm    Post subject: RG 400 vs RG 142 vs Rg 58 Reply with quote

5/13/2007

Hello Dean,

You wrote: "Anyone using RG-142 for your antenna runs? Is it for
transponder or GPS? Or both?"

I used either RG 400 or RG 142 for all of my coax installations.

RG 400 and RG 142 are both superior to RG 58 in performance and material. RG
400 has a multistranded core and RG 142 has a solid core. Some people favor
RG 400 over RG 142 because of the greater flexibility and resistance to
flexing fatigue failure.

RG 142 is a bit easier to work with when installing connections such as BNC.
There are avionics shops that will refuse to install RG 58 in your
airplane -- with good reason I think.

Look at RG 58 here:

http://www.belden.com/pdfs/MasterCatalogPDF/PDFS_links%20to%20docs/06_Coax/6.72_6.77.pdf

RG 400 here:

http://wireandcable.thermaxcdt.com/item/aerospace-wire-and-cable/mil-c-17-coaxial-and-twinaxial-cables/m17-128-rg400-id-74-?&plpver=10&origin=keyword&by=prod&filter=0

And Rg 142 here:

http://wireandcable.thermaxcdt.com/item/aerospace-wire-and-cable/mil-c-17-coaxial-and-twinaxial-cables/m17-060-rg142-id-64-?&plpver=10&origin=keyword&by=prod&filter=0

OC -- The best investment we can make is the effort to gather and understand
knowledge.

-----------------------------------------------

Time: 11:07:05 PM PST US
From: "DEAN PSIROPOULOS" <dean.psiropoulos(at)verizon.net>
Subject: AeroElectric-List: RG-142 Coax
When I was at Gulf Coast Avionics getting a bunch of stuff a couple years
ago I ended up with a roll of RG-58 coax and a small amount of RG-142 coax.
I don't remember whether the RG-142 was for my GPS antenna or the
transponder. RG-142 looks very much like RG-400 and if you didn't look at
the markings you would easily mistake it for RG-400. Anyone using RG-142
for your antenna runs? Is it for transponder or GPS? Or both? Thanks.

Dean Psiropoulos
RV-6A N197DM
Final wiring tasks.


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PostPosted: Sun May 13, 2007 7:38 pm    Post subject: RG 400 vs RG 142 vs Rg 58 Reply with quote

FWIW (a lot if a 430W is involved), Garmin requires RG400 coax when
upgrading to a GNS430/530W along with a new (different) antenna. And, a
gotcha, the connectors for the RG400 are NOT the same as those for the RG58.
Also if one is contemplating upgrading their 430/530, the antenna's come
with a TNC connector vice a BNC, another gotcha.
Wayne

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