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-request@contesting.com
Sent: Sunday, October 18, 2015 12:00 PM
To: topband@contesting.com
Subject: Topband Digest, Vol 154, Issue 18
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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 <peter@g3zss.com>
To: topband@contesting.com
Subject: Topband: Tee Antenna dimensioning
Message-ID:
<CAF+ZQkAjd0SJ0pibjoUMTq2Box+psc8GgDLu8fdJ1akF0T-VXA@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 <galicic@comcast.net>
To: "List, TopBand" <topband@contesting.com>
Subject: Re: Topband: Pre Stew - N3A
Message-ID:
<793005858.5188916.1445175907791.JavaMail.zimbra@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" <galicic@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
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------------------------------
Message: 3
Date: Sun, 18 Oct 2015 11:47:22 -0400
From: " K1FZ-Bruce " <k1fz@myfairpoint.net>
To: Topband <topband@contesting.com>
Subject: Topband: BOG antenna research at HC1PF
Message-ID: <20151018114722.gxslmib04cgkgkws@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
------------------------------
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