Date: Tue, 6 Feb 2018 14:16:15 -0500 (EST)
From: donov...@starpower.net
To: topband
Subject: Topband: FCC authorizes 1KW wireless power transmission
experimental station WJ2XGB on 160 meter band
https://swling.com/blog/2018/02/fcc-authorizes-wireless-power-transmission-experimental-station
One issue is probably the orientation of the Belize beach vs path to
VK/ZL. A vertical on the beach within .7 wavelengths of the tide line
has pronounced gain seaward. That gain is at the expense of the land
side pattern. For an antenna on a pier the pattern doesn't get
symmetrical until a w
The World Wide Radio Operators Foundation (WWROF) is pleased to
present the following Webinar.
Date - Tuesday, February 13
Time - 19:00 UTC
Registration - https://register.gotowebinar.com/register/6004189296300531458
Jukka OH6LI shares a presentation about receiving antennas. Gain and
front-to-b
Kees,
A 50 ft high vertical with two top hat loading wires each equal length
about 67ft will work great with a good ground field. It can easily be
fed with a 4-1 toroidal transformer 50-12.5 Ohms. Absolute minimum
radial field would be 30 1/4 wave radials adding as many possible short
radials
Hi All,
Since Roger, G3YRO, suggested that Wednesday night was a good time for
activity, and I happened to be at a radio, I turned on 160 and found some
good strong signals:
G3YRO 0102Z, OK1CW 0132Z, HG2DX 0136Z, and HA6FQ 0144Z.
Nothing further east was QSOed although I could hear a whisper of
I was going to try to phase 2 80m verticals but just could not find the
room. You get endfire and broadside.
I assume you have to put down the same radial field for a Parasitic
element as a driven one? Maybe I am wrong here.
On 2/9/2018 3:38 PM, Joel Harrison wrote:
Interesting question M
Interesting question Mike!
Possibly, however my focus was to achieve maximum gain with minimal
effort. This direction allowed me to accomplish that objective.
Don't know if anyone has documented experience in doing what you pose. I
would certainly be interested in reading the work anyone conducte
First, I want to say thank you to all who responded to my post about a top
loaded vertical for 160.
The antenna I wound up with was quite different than the one I proposed.
Basically, it is about 132 feet of wire. The top "bent" part (65 feet) is
carried by a piece of thin Phillystran stre
I believe you could get by with less radials with a phased array. In that
case all of the elements are "driven" so the current distribution in each
element will be forced.
With a parasitic element proper current distribution and thus gain is
impacted by ground resistance so a good, effective radia
This is Wes agreeing with Wes re the "too much loss in the system". In an
efficient system on 160 the SWR curve should not be so broad.
Years ago I had an Inverted L configured like what you have, with the
vertical wire going up about 65' spaced about 18" off the tower. The SWR
was broad. I th
Hi Folks,
I've decided to get serious and try to put up an 80 meter 4-Square around my
117' tower of Rohn 55. Getting into my place can be a VERY SERIOUS CHALLENGE to
any tandem rig so that may make getting 40' long 3" and 2" irrigation tubing
difficult to deliver. I've got new steel racks on
hi all,
can anyone tell me if there is common grey line between Kuwait and Tucson,
Arizona?
especially where SR/SS match. if so what dates?
thanks,
larry n7dd
_
Topband Reflector Archives - http://www.contesting.com/_topband
After getting a four square for 80 radial system buried and now starting the
160 system I wanted to pass along a good cheap source of yard staples. A
company called sandbaggy has been my source. You can find their stuff on ebay.
Cost is around $45/1000 for 6 inch staples. Best part is they
I used the same source twice and was very pleased.
Brian W1IR
On 2/12/2018 9:15 AM, cqtestk4xs--- via Topband wrote:
After getting a four square for 80 radial system buried and now starting the
160 system I wanted to pass along a good cheap source of yard staples. A
company called sandbaggy h
On 2/5/2018 8:23 PM, Grant Saviers wrote:
I also use wire wrap wire. The Kynar insulation is designed to not cut
thru against a sharp corner wire wrap post, no need to insulate
ferrite. I use 26 or 30 gauge. Multi colors are fun and available in
small spools on ebay in both gauges. No mess
I agree about the pie. I have done a bit of reading. Their
experimental station will use a 50kW broadcast xmtr to (they say)
generate a Zenneck surface vertical EM wave with little radiation loss
into the sky by using a special "probe". Zenneck waves are real and
have been demonstrated in a
Hi Bill,
As Wes already mentioned, your SWR bandwidth is suspicious as is your
minimum SWR. Nevertheless your signal this morning was pretty much on par
with the strongest signals I have ever heard from KH6 land on 160 meters.
When I worked you this morning signals were not that great, but after
Terry,
I think Bill KH7XS just went through this exercise.
That said, my (Comtek) 80m 4-square is made 100% from wire and hung in the
woods as inverted L's.
Raised radials.
Seems to work. Electrons don't (really) care if you use $1000 worth of
aluminum or $100 of used wire.
Mike,
Is your 80m 4square like the ON4UN with the L pointing towards each other. I
was reading his book the other night. Great stuff.
73
Darrell AB2E
From: Topband on behalf of Mike Smith VE9AA
Sent: Monday, February 12, 2018 6:02:30 PM
To: topband@contesting.co
Hi Darrel,
No, it's a mish mash of oddly shapen all wire inverted L's in the woods.
The ends do not point at each other at all. Viewed from above, the entire
mish mash of wires and 2 raised radials/per would look almost like a perfect
square.
Mike, Coreen & Corey
Keswick Rid
As requested, one of the members wanted the link to the ebay site 1000 staples
for $46, free ship.
https://www.ebay.com/itm/Sandbaggy-1000-6-Landscape-Staples-SOD-Staples-Garden-Stakes-Weed-Barrier-Pins/120895612145?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
_
Top
My point was as follows.
Apart from the launch point in V3, the entire path is over salt water.
This means that any ground reflections will happen with the minimum
loss. Even with several hops, this element of path attenuation will
therefore be minimal.
My main observation is that QSO succes
If you are on one of the Islands such as Ambergris or cawker you would
have plenty of Salt going west, if you can get a beach location on the
East. Same for some area of Placentia. In February I did not think the
noise was that bad from V3M/V31MU. We were also set up to work the USA
and VE an
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