On Wed, 13 Nov 2013 13:59:14 -0500, W2RU - Bud Hippisley wrote: > If a transmission line is lossy, the SWR will get progressively lower as you > move closer to the transmitter. In an extreme case (such as 1000 feet of old > RG-58 or worse, at high enough frequencies), there will be so much loss in > the line that EVERY antenna will look like 50 ohms back at the transmitter > and the SWR will be 1:1 there! So the transmitter end of the line is the > LEAST useful end to look at SWR.
Correct. If the line is long (lossy) enough, a dead short will look fine at the transmitter end. I wish Smith charts had been spoken of and understood back when I got started. To this day, I do not understand them in the least. I wish I did. I am one who, most of the time, can no longer read something in text and transform it to new knowledge. It needs to be 'splained to me in a one on one dialog. SWR was measured by taping a short piece of twinlead (more to it than that) against your line and looking to see which light bulb lit up the strongest. :o) The RF ammeter was used for peaking output. Off I go to try again to find another explanation of Smith charts. Gary -- -- http://ag0n.net 3055: http://ag0n.net/irlp/3055 NodeOp Help Page: http://ag0n.net/irlp ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
