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Re: [TowerTalk] velocity factor for Saxton 8315 and 8316

To: <jim@audiosystemsgroup.com>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] velocity factor for Saxton 8315 and 8316
From: "Dick Green WC1M" <wc1m73@gmail.com>
Reply-to: wc1m73@gmail.com
Date: Sat, 8 Nov 2014 13:14:32 -0500
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
Thanks, Jim. Could you summarize the procedure (e.g., measure the cable open
or shorted) and arithmetic for me?

73, Dick WC1M

> -----Original Message-----
> From: Jim Brown [mailto:jim@audiosystemsgroup.com]
> Sent: Friday, November 07, 2014 7:07 PM
> To: towertalk@contesting.com
> Subject: Re: [TowerTalk] velocity factor for Saxton 8315 and 8316
> 
> On Fri,11/7/2014 2:30 PM, Dick Green WC1M wrote:
> > I think these cables are similar to LMR-240, but don't know if the
> > velocity factors would be the same.
> 
> Hi Dick,
> 
> Best way to learn it is to measure it. Find the null frequencies of a
known
> length of the cable as a stub, then do the arithmetic. Try to make the
> measurements at frequencies near where you want to use the cable,
> because Vf varies a bit with frequency. An analyzer as simple as an MFJ
> works for this.
> 
> 73, Jim K9YC


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