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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[TowerTalk\]\s+Elementary\s+feedline\s+loss\s+question\s*$/: 4 ]

Total 4 documents matching your query.

1. [TowerTalk] Elementary feedline loss question (score: 1)
Author: Pete Smith N4ZR <n4zr@contesting.com>
Date: Fri, 04 Apr 2014 09:53:55 -0400
If I terminate a long 50-ohm coaxial cable with a 50-ohm dummy load, and put an MFJ-259B on the other end, and it reads R=56, X=0 at a given frequency, what is the mathematical relationship between t
/archives//html/Towertalk/2014-04/msg00055.html (6,979 bytes)

2. Re: [TowerTalk] Elementary feedline loss question (score: 1)
Author: "David Robbins" <k1ttt@arrl.net>
Date: Fri, 04 Apr 2014 15:06:45 +0000
Well... if it is just cable loss and the cable is uniform the R should approach Z0 as the length increases no matter what the load is... the less loss the slower the approach to Z0. If the cable is t
/archives//html/Towertalk/2014-04/msg00060.html (9,202 bytes)

3. Re: [TowerTalk] Elementary feedline loss question (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Fri, 04 Apr 2014 11:31:02 -0700
Perhaps a less error prone way to measure loss is to use your transmitter, dummy load, and SWR/power meter. I put the power meter at the transmitter and set the power level on the SWR meter. Then mov
/archives//html/Towertalk/2014-04/msg00069.html (8,769 bytes)

4. Re: [TowerTalk] Elementary feedline loss question (score: 1)
Author: Steve Hunt <steve@karinya.net>
Date: Fri, 04 Apr 2014 22:02:10 +0100
Here's a method I use: Terminate the line with a short circuit. At the other end of the line use the analyser to find the frequencies where the line impedance is lowest resistance and zero reactance
/archives//html/Towertalk/2014-04/msg00075.html (8,961 bytes)


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