Hello A really simple way to 'match' your antenna after gathering the feed-Z at the interested frequency is to enter the data into ===> "*Iowa Hills Smith Chart v3.0*" software to establish the matching elements needed.
73 Dick/w7wkr On Wed, Mar 29, 2023 at 9:02 AM <topband-requ...@contesting.com> wrote: > Send Topband mailing list submissions to > topband@contesting.com > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.contesting.com/mailman/listinfo/topband > or, via email, send a message with subject or body 'help' to > topband-requ...@contesting.com > > You can reach the person managing the list at > topband-ow...@contesting.com > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Topband digest..." > > > Today's Topics: > > 1. 160, 80 and 40 Meter Inverted L Tuning (Bill Smith) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 29 Mar 2023 15:26:04 +0000 (UTC) > From: Bill Smith <ko4n...@yahoo.com> > To: "topband@contesting.com" <topband@contesting.com> > Subject: Topband: 160, 80 and 40 Meter Inverted L Tuning > Message-ID: <1962277811.1953715.1680103564...@mail.yahoo.com> > Content-Type: text/plain; charset=UTF-8 > > I put up a 160-meter Inverted L in my backyard with traps for 80 and 40 > meters.? The vertical section is up about 35 feet with 31 feet of wire > between the 80-meter and 40-meter trap.? From the 80-meter trap to the end > of the antenna is 60 feet of wire.? It is hung as a sloping U.? At the end > of the U bend in the wire is a 4-inch pulley.? It's the best I can do with > my small yard.? I have tried various lengths of a counterpoise as well as > my radial field with no luck.?? > >From my VNA > 80 Meters at 3.850 MHzSWR-11.5Smith Chart- 26.7ohms 372pfResistance- 50 > ohmsReactance- S11x100 -111 ohmsSWR at 4.000 MHz is 12.6 > 160 Meters at 1.9000 MHzSWR- 32Smith Chart- 1.648 ohms 473 > microhenriesResistance- S21x100- 50 ohmsReactance- S11x100- 10.04 ohmsSWR > at 2.000 MHz is 50 > I obviously have a lot of research yet to do but wanted to see if these > results make sense or not.? Any ideas on the best way to tune this? > 73,Bill KO4NR > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > Topband mailing list > Topband@contesting.com > http://lists.contesting.com/mailman/listinfo/topband > > > ------------------------------ > > End of Topband Digest, Vol 243, Issue 16 > **************************************** > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector