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RG 400 vs RG 142 vs Rg 58

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bakerocb

Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA

Posted: Sun May 13, 2007 3:58 pm Post subject: RG 400 vs RG 142 vs Rg 58

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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w_sweet(at)comcast.net
Guest

Posted: Sun May 13, 2007 7:38 pm Post subject: RG 400 vs RG 142 vs Rg 58

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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