Hi Peter, I have built many 160 T’s and they always come out best with the vertical height + the horizontal top equaling around 135 – 140 ft for 1820. I know you mentioned 1900 but you can scale that from these numbers. I have several with 90 ft vertical and 45 top wire and friends with 70 vertical and 65 horiz top wire. The lengths will change as you add more radials but once over 20-25 the freq change should become minor so I would not do a lot of adjustments until you get some radials on it. These numbers will vary a small amount per location of course but this should be close. I usually put the antenna as high as possible and not trim the vertical. I adjust the top hat on both ends. I know that is more trouble but that way you get to maintain all the vertical height possible for your location. I feed mine direct with a very small mismatch. GL 73 Mike K4PI
From: topband-requ...@contesting.com Sent: Sunday, October 18, 2015 12:00 PM To: topband@contesting.com Subject: Topband Digest, Vol 154, Issue 18 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. Tee Antenna dimensioning (Peter Bacon) 2. Re: Pre Stew - N3A (Joe Galicic) 3. BOG antenna research at HC1PF ( K1FZ-Bruce ) ---------------------------------------------------------------------- Message: 1 Date: Sun, 18 Oct 2015 12:20:46 +0100 From: Peter Bacon <pe...@g3zss.com> To: topband@contesting.com Subject: Topband: Tee Antenna dimensioning Message-ID: <caf+zqkajd0sj0pibjoumtq2box+psc8ggdlu8fdj1akf0t-...@mail.gmail.com> Content-Type: text/plain; charset=UTF-8 Advise please on the formula to calculate the lengths of the horizontal elements for a 160m Tee antenna. Currently I have a 60 foot vertical wire suspended between the trees, with a long horizontal section making an inverted L, but want to change it to a Tee. I am looking to resonate the antenna around 1.9 MHz and then bring it down with a hairpin match. Thanks Peter G3ZSS ------------------------------ Message: 2 Date: Sun, 18 Oct 2015 13:45:07 +0000 (UTC) From: Joe Galicic <gali...@comcast.net> To: "List, TopBand" <topband@contesting.com> Subject: Re: Topband: Pre Stew - N3A Message-ID: <793005858.5188916.1445175907791.javamail.zim...@comcast.net> Content-Type: text/plain; charset=utf-8 Thanks to everyone for all the Q's and patience digging my QRP signal out. I made 103 contacts with many 6 & 9 point contacts and four 12 and 15 point contacts. Those were a real challenge. Overall band conditions were great with low QRN and local noise. I had a blast ! -73 Joe N3A/N3HEE ----- Original Message ----- From: "Joe Galicic" <gali...@comcast.net> To: "TopBand List" <topband@contesting.com> Sent: Friday, October 16, 2015 9:53:12 AM Subject: Topband: Pre Stew - N3A I will be operating the Pre Stew as N3A (NAQCC Special Event Station). I will be QRP at 5 watts. I hope to work a bunch of you ! Thanks -Joe N3HEE _________________ Topband Reflector Archives - http://www.contesting.com/_topband ------------------------------ Message: 3 Date: Sun, 18 Oct 2015 11:47:22 -0400 From: " K1FZ-Bruce " <k...@myfairpoint.net> To: Topband <topband@contesting.com> Subject: Topband: BOG antenna research at HC1PF Message-ID: <20151018114722.gxslmib04cgkg...@webmail.myfairpoint.net> Content-Type: text/plain; charset=UTF-8 ? Luis, IV3PRK/HC1PF? has been instrumental in BOG antenna research. He has brought together information from some of the top BOG antenna users/researchers, and an antenna plotting expert. He has?constructed BOG antennas that helped over come noise at HC1PF his 2nd QTH near the equator.? ? http://www.iv3prk.it/new-page.htm ? ? 73 Bruce-K1FZ ------------------------------ Subject: Digest Footer _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband ------------------------------ End of Topband Digest, Vol 154, Issue 18 **************************************** _________________ Topband Reflector Archives - http://www.contesting.com/_topband