A comment on tuners. The SWR and associated increased loss remains the same on the feed line regardless of the action of the tuner. When using a tuner, the load only looks better to the transmitter and the tuner presents added overall loss.
Reflected power is not totally lost power. Only the loss of the feed-line contributes to lost power. Bob, K4TAX Sent from my iPhone > On Aug 7, 2017, at 8:19 PM, Edward R Cole <[email protected]> wrote: > > Concur on suspecting cables as first step for most problems. Also suspect > the meter that measures the signal/voltage/current/etc. Or other items in the > line. > > I ran into a similar issue using an antenna tuner on 2m. I had just put up a > 11-element yagi (not real high but equivalent to the vertical previously > used). I could hardly hear my neighbor on 2m-SSB only 15 miles away. More > interestingly he reported my signal as low...hmm. I switched back to the > vertical and signals in both direction jumped up in strength...double hmm! > > OK the yagi had not been in service for a couple years and I was unable to > make any tests before it was put up on another tower. SWR was close to > marginal so I inserted my 2m antenna tuner and that fixed the SWR. I checked > power on each side of the tuner and it was about the same ( a little lower on > output). Soooo I removed the tuner and power indicated went from 110w to > 100w but the signal jumped in both directions. Note to self: "leave this > tuner on the dusty shelf". > > The SWR is about 1.8 without and tuner but the 100w amplifier is happy (no > fold back) and signal are much better on both ends of the circuit (S0 jumped > to S3). Guess that tuner is very lossy (MFJ-921). Of course MFJ means > "mighty fine junk" <smile> > > 73, Ed - KL7UW > http://www.kl7uw.com > Dubus-NA Business mail: > [email protected] > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to [email protected] > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
