Hello Mike
You forget that on this side of the pond, the majority of us live on pocket
handkerchief sized plots. :-)
The representative of a major building company in the UK was on TV yesterday
saying that 1000 sq ft was plenty big enough for a three bedroomed house.
I imagine that would be the
Iceland: three people per square km
- Original Message -
From: Tracey Gardner lt;tracey.gard...@talktalk.netgt;
To: topband@contesting.com
Sent: Wed, 20 Aug 2014 02:30:49 -0400 (EDT)
Subject: Topband: Skimmer calibration
Hello Mike
You forget that on this side of the pond, the
Iceland: three people per square km. :)
- Original Message -
From: Tracey Gardner lt;tracey.gard...@talktalk.netgt;
To: topband@contesting.com
Sent: Wed, 20 Aug 2014 02:30:49 -0400 (EDT)
Subject: Topband: Skimmer calibration
Hello Mike
You forget that on this side of the pond, the
It's not necessary to place a vertical antenna at waters edge to gain the low
angle efficiency advantages of an oceanfront site. There are two zones of
interest: the area immediately adjacent to the antenna which primarily affects
efficiency (very important for transmitting and very
This is somewhat related to the vertical on a beach thread but I figured if I
put that in the subject line I might get lynched.
In the past there have been questions about the accuracy of NEC far field
calculations at low take-off angles for vertical antennas since the far field
does not
Hi Dwight,
I have 3 point fed pennants that share the same feedpoint and use only one
BN-73-202 Binocular Core Transformer matching transformer at the feedpoint
(one pennant pointing 40 degrees, one pointing 160 degrees, and one
pointing 300 degrees) and have been using this system for over 3
Dwight,
Correction, I should have said 0 volts over the control line (not feedline)
selects one pennant, +12 volts selects the second pennant, and -12 volts
(just reversing polarity of the power supply connected to the control line)
selects the 3rd pennant.
Don
On Wed, Aug 20, 2014 at 7:11 AM,
- Original Message -
From: Tom W8JI w...@w8ji.com
To: topband topband@contesting.com
Sent: Tuesday, August 19, 2014 10:08 PM
Subject: Re: Topband: Skimmer calibration
BC antennas have the elaborate radial system in order to get that
groundwave while the typical on ground ham
Hi Dwight,
I just added the schematic of my 3 Pennant RX antenna switching system to
my website.
http://sites.google.com/site/pennantflagantennas/
Just FYI,
Don (wd8dsb)
_
Topband Reflector Archives - http://www.contesting.com/_topband
Most common K9AY relay-switching configuration involves a single
transformer, with relay-switching at the high impedance side, and just
inches of run from the transformer to the relays to the loops. The unused
loops are left open (not connected either side).
The proposed single-transformer
I said:
That just isn't factual at all. Radials under the vertical antenna have
virtually no effect on wave angle unless they are sparse and grossly
unbalanced, allowing them to radiate like a low horizontal antenna.
Radials change the efficiency, not the pattern, unless the radials
radiate
I said:
That just isn't factual at all. Radials under the vertical antenna have
virtually no effect on wave angle unless they are sparse and grossly
unbalanced, allowing them to radiate like a low horizontal antenna.
Radials change the efficiency, not the pattern, unless the radials
On Tue,8/19/2014 7:08 PM, Tom W8JI wrote:
Radials under the vertical antenna have virtually no effect on wave
angle unless they are sparse and grossly unbalanced, allowing them to
radiate like a low horizontal antenna.
Radials change the efficiency, not the pattern, unless the radials
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: topband@contesting.com
Sent: Wednesday, August 20, 2014 12:48 PM
Subject: Re: Topband: Skimmer calibration
On Tue,8/19/2014 7:08 PM, Tom W8JI wrote:
Radials under the vertical antenna have virtually no effect on
Anyone know if the ferrite beads that are encased on the cables of older CRT
monitors are any good for use in the shack.
This has probably been asked before but I can not find any info.
Thanks ,
Joe K2UF
_
Topband Reflector Archives -
Dan AC6LA wrote:
...To help resolve the issue I modeled a ?/4 vertical with and without the
ground wave at multiple slant (radial) distances and plotted the results.
etc
Dan's AutoEZ charts remove all doubt about the issue of whether or not the
ground wave contributes to monopole radiation
Anyone know if the ferrite beads that are encased on the cables of older
CRT
monitors are any good for use in the shack.
This has probably been asked before but I can not find any info.
Thanks ,
Joe K2UF
Since most of those come from Asia it is anyones guess what mixes are used
by who. It
So now NEC is definitive? Even with all it's known defects around the
edges? NEC is the process that indicates the unproven/undisproven notch.
Measurements at aircraft altitudes and 25-50 km or hold one's peace.
73, Guy
On Wed, Aug 20, 2014 at 2:36 PM, Richard Fry r...@adams.net wrote:
Dan
We went to Japan for our honeymoon in 2010 and were invited to visit 7J4AAL
for a few days..
I have heard about his 160m-Yagi plan at this time and was very excited all
the years until now.
I talk to him and Masaru JA5AQC (with whom I went on a 23 day-round trip in
Europe 2012) frequently
Yes, the boom of the 5el 80m yagi is used as a 160m dipole.
160m and 80m yagis are on separate towers
While discussing about efficiency between yagis and vertical arrays it was
more the question, what Kan WANTED to build.
Sure he could have built a vertical array instead, but he didn't want to.
Guy Olinger wrote:
NEC is the process that indicates the unproven/undisproven notch.
Based on the AutoEZ charts linked here by AC6LA, the existence of this
notch is true only if NEC is misused and/or misunderstood.
_
Topband Reflector Archives -
21 matches
Mail list logo
