Gary and group,
I too would be most interested in hearing from those using the DXE
active antennas. I am able to deploy Beverages sometime in November after
life stock are removed from adjacent fields but would much prefer to have
the antennas on my own land year round. Other wise I am limited to a K9AY
which I certainly find a help but not normally equal to the Beverages. I
see the DXE adverts but then think of the Gotham antennas of the sixties and
wonder - no slur is meant by this but I would sure like to know more about
these active antenna systems. I must Google Hi-Z which is new to me. Top
band remains a challenge.
73 Doug EI2CN
-----Original Message-----
From: topband-bounces@contesting.com [mailto:topband-bounces@contesting.com]
On Behalf Of topband-request@contesting.com
Sent: 25 October 2011 20:01
To: topband@contesting.com
Subject: Topband Digest, Vol 106, Issue 32
Send Topband mailing list submissions to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of Topband digest..."
Today's Topics:
1. Hi-Z or DXE Active Rx antennae (Gary Smith)
2. Vertical for 160/80? (Jerry Keller (K3BZ))
3. bottom fed antenna causing broad band signal?
(BRYON PAUL n0ah VEAL)
4. Receive ant question (Its from Onion)
5. Re: Vertical for 160/80? (PaulKB8N@aol.com)
6. JD1BME Minami Torishima QSL card for 160m (Steve Ireland)
7. Jacek (Ryszard Tymkiewicz)
8. Need help feeding tower on 160 AND 80 (Brian Machesney)
----------------------------------------------------------------------
Message: 1
Date: Mon, 24 Oct 2011 16:14:28 -0400
From: "Gary Smith" <Gary@ka1j.com>
Subject: Topband: Hi-Z or DXE Active Rx antennae
To: topband@contesting.com
Message-ID: <4EA5C724.20838.4AE944B@Gary.ka1j.com>
Content-Type: text/plain; charset=US-ASCII
My Beverages are lousy to the point of being useless over the salt
marsh and I'm going out there & taking them down as soon as the deer
ticks go dormant for the fall.
Looking at the replies I've gotten for Rx antennae for this QTH, it
seems like one of my better options is to get an active Rx antenna
system like the DXE or Hi-Z 4 element series.
Does anyone know of a ham who has any of these active directional
units that is no longer using them & wants to move them along? If so,
please have them contact me directly.
Thanks,
Gary
KA1J
------------------------------
Message: 2
Date: Mon, 24 Oct 2011 18:59:57 -0400
From: "Jerry Keller \(K3BZ\)" <k3bz@verizon.net>
Subject: Topband: Vertical for 160/80?
To: "\(REFLECTOR\) Topband" <topband@contesting.com>
Message-ID: <5489F6FF60754456BE630F625DFB1D41@JKPC>
Content-Type: text/plain; charset="Windows-1252"
I have an aluminum tubing vertical that I no longer need to use on 40M.
Bottom 18? is 3? OD; rest is 1? OD, length is adjustable to max 35?. I?m
looking for details of a good way to use this as part of a vertical for
160M (and/or 80M) that might be better than an inverted el. Ideas?
73, Jerry K3BZ
------------------------------
Message: 3
Date: Mon, 24 Oct 2011 17:10:41 -0600
From: BRYON PAUL n0ah VEAL <bryonveal@msn.com>
Subject: Topband: bottom fed antenna causing broad band signal?
To: "topband@contesting.com" <topband@contesting.com>
Message-ID: <SNT143-W386B27B839A84716CF77E5B3EF0@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
I have a good friend who has a 1/4 wave 80 foot vertical (63 feet) who
decided to put a 100 foot coil to bottom feed the antenna for 160M. Using a
tuner, (no UnUN) he is resonant at 1.830 but the signal is very broad banded
at 4 miles away. Originally, he started with a coil made of 50 feet of
copper and was resonant at 1.890Mhz. Any red flags with this design to
warrant this problem of hearing him 30KHz wide, (10 up, 20 down) ?? On the
scope, the signal looks very clean, and I only see it 3-5 Khz wide, as I
would expect. Hut he is transmitting CW on LSB using CW software. The coil
is only around 2 1/2 inches wide- I am thinking larger turns would be less
of a coil- Any suggestions appreciated- this is not an antenna I understand
very well but would like to get some input- The station is very clean for
issues but is the coil suspect- I think I would just gone with an Inv
L....... hihi
Please feel free to respond to n0ah@arrl.net.
Paul N0AH
------------------------------
Message: 4
Date: Tue, 25 Oct 2011 05:40:19 +0000
From: Its from Onion <aredandgold@msn.com>
Subject: Topband: Receive ant question
To: <topband@contesting.com>
Message-ID: <SNT107-W589AF19274EBA90F40AD43BCEC0@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
I'm looking to build and install my first beverage receive antenna. I use a
756 Pro and wondering a couple questions from folks who have been there.
1. Do I need a pre-amp and if yes your suggestion.
2. Do I need a front end saver and your thoughts again.
Thank you and
73,
Lee
KE4VYN
------------------------------
Message: 5
Date: Tue, 25 Oct 2011 04:11:59 -0400 (EDT)
From: PaulKB8N@aol.com
Subject: Re: Topband: Vertical for 160/80?
To: k3bz@verizon.net, topband@contesting.com
Message-ID: <304f0.4b9dc097.3bd7c94f@aol.com>
Content-Type: text/plain; charset="UTF-8"
Jerry,
The Cushcraft MA-160V vertical happens to be 35' tall. I believe there is
a capacitance hat at 23' with an inductor of unknown value just under the
hat. The hat spokes are 48" and there are 8 of them. Above that is a
"stinger", an adjustable element that can be lengthened or shortened to
bring
the system to resonance. The OD of your element is larger than that of the
MA-160V, suggesting that the size of the coil needed may be marginally
smaller to bring the system to resonance.
There is a user manual available online that details the construction of
the antenna. It is really very simple, 23.5 feet of aluminum, inductor,
hat, and adjustable aluminum "stinger" in that order. Read the eHam
reviews,
they are overwhelmingly positive, especially for an antenna of this size.
You might check with some of the eHam reviewers about replicating the
design, the value of the inductor being the only unknown. I believe
Cushcraft
even has the inductor listed as an individual part number. Perhaps they
would sell you one separately. If there is anything more to this design
that
I might have missed, I can't determine it from the manual. Users?
Perhaps more intriguing is that you might be able to tap the inductor for
80M and short out the unneeded inductance via a control cable inside the
aluminum tubing. This design probably isn't optimized for that band, but
it
may still outperform at least some of the alternatives.
I'm somewhat familiar with the design because I have a tree branch at 35'
that would support a wire version of this design and is inside a cluster of
trees that would hide the entire antenna, a must in my covenant-restricted
neighborhood.
YMMV, but it is a proven design that should be easy to replicate. I don't
encourage pirating of commercial designs, but emulating this for
comparison against other designs is well within the spirit of ham radio
antenna
design IMHO. Good luck!
73, Paul, K5AF
In a message dated 10/25/2011 12:14:52 A.M. Central Daylight Time,
k3bz@verizon.net writes:
I have an aluminum tubing vertical that I no longer need to use on 40M.
Bottom 18? is 3? OD; rest is 1? OD, length is adjustable to max 35?. I?m
looking for details of a good way to use this as part of a vertical for
160M
(and/or 80M) that might be better than an inverted el. Ideas?
73, Jerry K3BZ
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
------------------------------
Message: 6
Date: Tue, 25 Oct 2011 17:30:52 +0800
From: "Steve Ireland" <vk6vz@arach.net.au>
Subject: Topband: JD1BME Minami Torishima QSL card for 160m
To: <topband@contesting.com>
Message-ID: <2783E517A2C640DB80B1B6A09F78C7CE@VK6VZ>
Content-Type: text/plain; charset="US-ASCII"
G'day
Back in January 2007, along with a number of other topbanders, I worked
JD1BME on Minami Torishima. My recollection is that the operator's only QSL
route was via the JARL Bureau. Despite sending several QSLs, including two
direct to the bureau (which is one of the most reliable bureaus in the
world), I have been unable to get a QSL card in return.
Please has anyone had any luck with this one?
Vy 73
Steve, VK6VZ
------------------------------
Message: 7
Date: Tue, 25 Oct 2011 12:52:09 +0200
From: "Ryszard Tymkiewicz" <rtym@ippt.gov.pl>
Subject: Topband: Jacek
To: <topband@contesting.com>
Message-ID: <7E95DC38B725496BB299B08E43A0D65F@ryszard520>
Content-Type: text/plain; charset="iso-8859-2"
Jacek get stuck at the Airport in Lata...at least till Saturday, I don't
know
what will be with his bookings from Honiara to Fiji and later to Los
Angeles
and London - Warsaw... it seems DXpedition ( especially Topband ones)
are not always easy.
73 Rys SP5EWY
------------------------------
Message: 8
Date: Tue, 25 Oct 2011 10:07:12 -0400
From: Brian Machesney <nekvtster@gmail.com>
Subject: Topband: Need help feeding tower on 160 AND 80
To: topband@contesting.com
Message-ID:
<CAFJh+jhXPcM6jdD3U_qi5Y6uASrgiFmNjqfv_xbj9FrSQ5V_EQ@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Gang,
I have an 80-ft tower topped by an KT34XA (elements insulated from 32-ft
boom) and 40-2CD (only reflector electrically connected to 22-ft boom). I
have 8 x 50-ft lengths of 4-ft wide welded, galvanized steel fence for a
ground screen. No other radials.
I have successfully matched this on 160 with about 350-pF series capacitor
to a 45-ft #12 gamma wire spaced about 3-ft from the tower.
I also want to feed the tower on 80. I have been hoping that the 160 gamma
wire would "disappear" electrically when it is open-circuited. Given the
complex configuratino of the GAP vertical antennas, this may be but a faint
hope. I'm having trouble creating a good match on 80 with a simple gamma
feed scheme.
Has anyone on the reflector tried to feed the same tower on two bands?
Please reply off-reflector.
Thanks and 73,
Brian K1LI
------------------------------
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End of Topband Digest, Vol 106, Issue 32
****************************************
_______________________________________________
UR RST IS ... ... ..9 QSB QSB - hw? BK
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