[TowerTalk] 6M Transmission Line

[Earl Morse]

LMR-600 is 50 ohms.  Shouldn't be any problem.

http://www.nr6ca.org/pdf/LMR600A.pdf

If it were 75 ohms the simple answer would be that it would bump the VSWR of a matched 50 ohm system to 1.5:1.

For the more complex answer you can get out your Smith chart and see how the varying lengths of the different coax transforms your load impedance back at the source.

Earl
N8SS


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Message: 7
Date: Thu, 18 Jul 2013 17:40:53 -0230
From: Frank Davis <fdavis at nfld.net>
To: "towertalk at contesting.com" <towertalk at contesting.com>
Subject: [TowerTalk] 6M Transmission Line
Message-ID: <F28308C5-9263-4F19-8A02-D37DA4692F74 at nfld.net>
Content-Type: text/plain;	charset=us-ascii

> I have about 100ft of new LMR600 and also two new UHF connectors to fit the line.   I am Feeding  a three element 6M yagi through 50ft of RG213....the end of which is about 8 ft up the side of my HG52SS tower.....What do you think of an idea I have  to use the LMR600 to feed the end of the RG213 and run directly into the shack for the K3 for 6M use.  I know the LMR 600 is 75ohm so there will be a bit of a mismatch ...will it be significant?...as far as the K3 is concerned?
> 
> Frank VO1HP

Sent from an iPad2

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