I very much doubt EK8ZT. Smells very fishy, all the big EK signals are
pretty well known in EU and that's not one of them. I think they saw you
coming.
HNY Clive GM3POI
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Mark
Lunday
Sent: 28 December 2018
This is a manly solution for launching antennas... just load a frozen carp
and you can cast your antenna line 300 yards! If the carp gets stuck in a
tree, the birds will take care if it.
https://www.facebook.com/InTheKnowInnovationAOL/videos/1912747892351198/?fref=gs=13909010799_location=group
I would have kept mine if I had seen that kind of performance. Either I have a
very low noise floor, I had degraded performance of the RX antenna for some
reason or I was doing something wrong. When I saw a difference in SNR it was
very minor and wouldn’t have been the deciding factor in
Being that K8ZT is a friend of mine, I asked him if he was on FT8 160 meters
yesterday around sunset.
Anthony responded that he was on and made several 160 meter FT8 QSOs, and
even cooking dinner at the same time!
Probably WD4ELG heard Anthony, K8ZT in Ohio grid EN91
73
Tim K3LR
I was an early participant in the SAL yahoo group and introduced Dan, AC6LA, to
the group. He has provided a lot of modeling tools.
That said, I lost interest after feeling that the design was too complicated,
not well understood and suffered from a dizzying number of changes. I could be
The EK was calling CQ with a US grid square..might be legit ?
jay ny2ny
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Wes you're right
The SAL is a good antenna, any directivity increases signal to noise ratio. The
RDF is 2 to 3 bd better than the vertical antenna, it means the improvement on
signal to noise ratio is about 6db. You can dig signals 6 db below noise with
the SAL that you cannot hear with the
Thanks for posting Peter..that's awesome.
Still not sure how I'd explain this thing to a police officer while on my way
to put up antennas.
73,
Gary K9GS
Original message From: Peter Bertini
Date: 12/28/18 10:16 AM (GMT-06:00) To:
topband@contesting.com Subject: Topband:
JC said,
The SAL is a good antenna, any directivity increases signal to noise
ratio. The RDF is 2 to 3 bd better than the vertical antenna, it means the
improvement on signal to noise ratio is about 6db. You can dig signals 6
db below noise with the SAL that you cannot hear with the inverted L.
Hi Wes,
I'm 95% certain that N4IS knows what he's talking about here. I've been
reading the posts on this reflector for years, and there's a few experts
that stand above and beyond the rest of us. ;-)
He invented the Waller flag, IIRC; you might want to look into that. He has
written much about
Hi Todd,
I'll bet the farm (if I had one) that your air-core choke is ineffective.
Take at look at
http://www.karinya.net/g3txq/chokes to see what I mean.
A very, very good common mode choke is the one I have on mine, from
http://audiosystemsgroup.com/RFI-Ham.pdf. There is no better material
Hi Mike,
Oh, I would totally believe that the air-wound choke is ineffective at
160m. It just happens to be what I had available to use when I rigged up
the elevated radials in the cold rain yesterday. I figured I'd put it in
line just in case.
Thanks for the choke links, I will read the info on
A person emailed me to ask if I could take SWR readings at the rig without
a tuner. Since my antenna analyzer is non-op due to the AM station nearby.
The feedline is about 140' of LMR-240.
Here is the indicated SWR at the 7300:
1.810 1.2:1
1.830 1.3:1
1.850 1.5:1
1.870 1.8:1
1.900 2.3:1
1.940
[sigh]
On 12/28/2018 10:33 AM, Tim Duffy wrote:
even cooking dinner at the same time!
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
To all Stew Perry participants, the SP and the RAC winter contest
overlap for nine hours, please give VE participants a serial number as
well as the grid square and then that will qualify for both contests. I
will give out both my grid square and my province for the same reason.
Good luck to
Jay
The SAL is only one electrical equivalent loop with 9 db RDF, the Waller
Flag has 2 flags in phase with 11.5 db RDF.
It is not on the same class. Sorry but I am been honest here, both antennas
need the tower to be detuned to work.
The invention of a BALUN just transfer the impedance
I originally started this thread and I want to once again thank everyone
who provided input and advise both privately and on the reflector.
So the 100' tall vertical with the 30' horizontal loading wire works
**horribly**. I have about a week with it now every evening and it is much,
much poorer
Two 100 x 3 ft rolls of chicken wire were added this fall. I have about 45
radials, good conductivity, clear view, and the sump pump dumps out nearby. It
is quiet in the country but the beverages are better. I am putting up a
SAL30. It will be better for USA contests. The F/B is good enough
LOL, oh comeon, enough carping, I've made
hundreds of QSOs, many of them CW, while
driving.
73,
Gary
KA1J
> [sigh]
>
> On 12/28/2018 10:33 AM, Tim Duffy wrote:
> > even cooking dinner at the same time!
> >
>
> _
> Searchable Archives: http://www.contesting.com/_topband -
Modeling I've done shows it a bad idea to have in ground and elevated
radials connected together, but that is not clear from what you
described. Then with the elevated separate, moving the feedpoint up at
least 8', to 12' is better and elevated radials run out at that height.
I think it is a
eBay...
https://www.ebay.com/itm/NOS-CentraLab-CRL-850S-75N-Doorknob-Capacitor-75-pF-7500-V-N750-in-Silver-Saver/264077356412?hash=item3d7c3cad7c:g:m9EAAOSwUalcCkiZ
Cecil
K5DL
Sent using recycled electrons.
> On Dec 28, 2018, at 3:16 PM,
> wrote:
>
> Greetings topbanders. . .
>
> While
Hello Grant,
Your advice is spot-on! Elevated radials MUST NOT be connected to ground.
Perhaps that's one of the reasons why Todd's inverted-L is working so
poorly.
Another important thing is to have a GOOD choke balun right at the
feedpoint. *We need to keep the current off of the feedline
I can't speak to all the technical details of this discussion, but I can say
that I've had a very good experience with the SAL-12, despite having very
difficult terrain. My SAL is partly over concrete and partly over dirt; partly
over a level surface and partly over a steep downhill slope; and
Thank you, Gary! Now I know where I can buy a spare plate choke bypass
capacitor for my homebrew dual-833C linear amp. :-)
73, Mike
www.w0btu.com
On Fri, Dec 28, 2018 at 4:10 PM Gary K9GS wrote:
> Hi Dave,
> Take a look here:
> https://www.alpharfsystems.com/?s=75+pF=Search
> They have both
Sorry, I wasn't completely clear in my post. The elevated radials are not
connected to the buried radial field. They are two separate entities. Now
the elevated radials do sit above or cross some the buried radials in some
places so I'm sure they do interact but they aren't directly connected
Greetings topbanders. . .
While CQing early this morning I began noticing a faint but troubling smell in
the shack. It smelled like over heated wiring or electrical components. It
continued to get stronger as I realized the odor was coming from the Alpha 99
amp. Indeed, a few moments later
Hi Dave,
Take a look here:
https://www.alpharfsystems.com/?s=75+pF=Search
They have both the individual caps, now 18 kV, and the 5 capacitor assembly.
Good luck
73,
Gary K9GS
Original message From: daraym...@iowatelecom.net Date:
12/28/18 3:16 PM (GMT-06:00) To:
Wow. . a bunch of excellent responses including Alpha even offering the cap
bank as an assembly (I understand there may have been some failures of this
part). Anyway, I think I got some answers and several good options.
Thanks for sharing the knowledge. See you all in the Stew. . .73. . .
Dave, was the original a doorknob? Like this?
https://www.rfparts.com/580075-7p.html
Some manufacturers have taken towards, as padding on the loading side of the
tank, super quality glass high current surface mount caps in which case it
would look like a silvery rectangle.
Tim N3QE
> On Dec
Those SWR readings seem to indicate a very large bandwidth, to the extent
it might suggest that your ground resistance losses are swamping the
antenna R radiation resistance. It would be nice to know the R value at
resonance, where there is no J value. Too bad the analyzer is overloading.
A
All,
Two cents worth of comments on thread. The SAL, K9AY and Waller Flags
all work well and have their limitations. They do help the city folk
improve the ability to receive. The WF works great if you can get it up
in the air and rotate it. That is if you can keep it there in one piece
I can heartily confirm Bob's experience. I live in Iowa and moved from the
suburbs of Des Moines to a rural setting 22 years ago. I have a well
constructed overhead single phase 13.2 kV distribution feed on the road 1/4
mile from my home. My house is fed underground from the pole to the
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