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Understanding SWR

Jun 12th 2017, 21:14


Joined: Jul 15th 2016, 22:48
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For those who are constantly wondering about SWR, I invite you to read an excellent article written by K5DVW on the topic from the November 2006 issue of QST.

It was an "eye opener" for me.
Jun 16th 2017, 10:03


Joined: Dec 9th 2015, 16:03
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Total Posts: 0
wow, wish I had a copy of Nov 2006 QST, my access to the arcive only goes back to 2012
Jun 16th 2017, 11:02


Super Moderator

Joined: Apr 4th 1998, 00:00
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Our original archive allows the download of older articles.

Zack W1VT
ARRL Senior Lab Engineer
Aug 29th 2019, 23:25


Joined: May 14th 2010, 14:35
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Total Posts: 0
Were there ever any retractions or corrections made to this article? K5DVW lists Table 1 showing the 33% reflected voltage at 2:1 VSWR for example, yet lower down the article he mentions nothing of these losses. Also, if the feedline is connected directly to the transmitter without the tuner, the reflected wave will partially dissipate in the resistance of the transmitter increasing heat and adding losses to the signal being transmitter. I mean, someone needs to explain how the signal being reflected won't be dissipated by the transmitter. There seems to be a few flaws to this article. The SWR losses can be shown by using Ohm's Law. Also I have tried emailing K5DVW, but to date he has not responded.

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