I echo W1FMR's question regarding possibly substituting a T200-2 core.
Personally, I'd double it up, i.e. either a stack of two T-200-2 or else
a T200A-2 which is 1.00 inch thick vs. 0.55 in. for a T200-2. My guess
is that the power handling would be less than a T300A-2? But what about
smaller #2 c
Hi Guy
Thanks for the reply - most interesting and helpful. I like your conversion
idea for the 450' ohm ladder line - like open wire line here too.
I did have an 160m inverted-L antenna here with a Moxon-type counterpoise
about ten years ago and it was a very useful antenna. However, you
Hullo folks. FWIW.
I mounted the FCP on my "inverted J" which is about 60 up, 40 over, and
another 40 to 50 over again. About 150 feet of wire on the radiator.
The FCP and transformer box are mounted about 7 feet up. Sent photos to
W0UCE since I still have the step ladder conveniently
Great reflector !
I am a new list member, condo dweller, Top Band lover, QRPer, and contester.
And strangely enough these present a challenge for others and maximum
enjoyment for me :-)
1. Is the FCP shown in the diagram in a line with the inverted L wire ?
2. Do you think a smaller T200-2
Dan,
This is a good thing. Your system is becoming more efficient - this is what
you want. If you desire a better match, you will need to use some sort of
matching system at the base of the antenna. The SWR will continue to rise as
you add more radials, however you will reach a point of diminis
The Inv L over a very dense, excellent radial field will have a feed Z of
in the neighborhood of 20 or so ohms, NOT 50. It usually requires a unun
to bring it up to 50.
When you first put it up, your counterpoise system was, to put it bluntly,
awful, and apparently a very lossy series resistance
I installed an Inv-L for 160 of about 134ft , ~72 feet vertical , when i
checked the SWR initially it was about 1.2:1 , then when i connected the ground
rods it rose to 1.5:1 , today I added the first 2 radials and the SWR is now
2:1. The antenna is being fed directly , my question is basically
The longest BOG I ever deployed was 5000 feet. The QTH was the desert west
of Lancaster, California. Awsome up to about 3 MHz.
Brian, KD6NRP
BOG antennas "love" desert and sandbar locations. The actual electrical
"ground" may be much below the earth's physical surface. The problem of self
A photo of a K2AV 160m FCP Isolation Transformer as installed yesterday at
W4KAZ has just been posted on the K2AV Antenna Page at www.w0uce.net
Direct page link: http://www.w0uce.net/K2AVantennas.html
73,
Jack W0UCE
___
UR RST IS ... ... ..9 Q
ANNND, through the efforts of at least four fella hams, I found the article
- it's contained in a Vertical Antenna compendium sort of publication, out of
the ARRL -- now on a mission to go and find that pubappreciate the replies!
72, Jim Rodenkirch, K9JWV
> From: rodenkirch_...@ms
The memories in the Kenwood TS-590S can be very useful in all kinds of
operational situations, but setting them up through the front panel can
be a slow process -- after a dozen or so, you rapidly lose the will to
live!
Well, when writing some Excel VBA code recently to handle serial I/O
ports
Harold Beverage discovered that a long wire on the ground was directional in
Otter Cliffs, Maine,, late summer of 1918 at the NBD Navy radio station.
A type of, on ground, receiving wire is now called a BOG antenna. (Beverage on
Ground)
For a Harold Beverage interview check out http://www.qsl.
I'm looking for an article written by Peter Anderson, KZ3K, titled, "Phased
Verticals with Continuous Phase Control."
I searched the ARRL archives but no luck --- anyone know where I can obtain a
copy of that article?
Thank you, in advance, for you assistance - reply off line probably work
very interesting, the FCP is a way to allow the real estate challenged
(no place for a true ground radial system, or a long high vertical
antenna) to get something that will do more than just warm worms
i would think the FCP would help those who do not have the opportunity
for a 3/8 or 1/2 wave
On 12/9/2011 8:05 AM, ZR wrote:
>
> Using a 120VAC 60Hz source and a 10A load the loss in 850' of #4 copper is
> 5.1V or 4.2%
>
> With aluminum it is 7.3V and 6.1%.
>
> It only gets worse at RF and once you reach about 3dB loss the input VSWR
> flattens out until it appears to equal the line imp
Steve, the length of the wire is your choice, with consequences in the
tuning realm.
The simple solution is to only use the wire on 160, and VARY THE LENGTH of
the wire to achieve a minimum SWR or zero reactance at 1.825, or your
choice of center of resonance.
If the length is fixed (your choice)
Hi Guy,
Many Thanks for you info. I plan to build the transformer.
I am wondering how you housed the unit??
Thanks in advance for your input...
73,
Ted K2QMF
On Thu, 8 Dec 2011 22:46:47 -0500 Guy Olinger K2AV
writes:
> Just a word on ferrite beads, and other kinds of baluns. Trust us,
- Original Message -
From: "Rick Karlquist"
To: "W0UCE"
Cc: ;
Sent: Thursday, December 08, 2011 9:41 PM
Subject: Re: Topband: K2AV 160m Folded Counterpoise Antenna - New Details
Posted
> W0UCE wrote:
>
>> * The ONLY means of achieving the required degree of Isolation is to
>> use the
Hi David
Gone are the days when it was common
to work 15 or 20 EU stations (or more) during an evening session with
signals from the more prominent stations being S9
The same situation is in Eu. Im daily on TB but only few new stations from
US is active. GD dxing on TB to all
Slavek ok1tn
_
> Also on Dec 6, George W8UVZ commented that the band isn't as poor as some
> would suggest.
> With respect to solar min versus solar max, the old adage that 160-Meters
> is best at solar min is somewhat of a self-fulfilling prophecy. We've
> heard 160 is worse at solar maximum, so we don't ge
I saw a comment on this yesterday and I would have to concur on the
deterioration of polar routes as a result of the new cycle peak.
My log shows this kind of data:
2007 - over the pole activity to JA starting 2 hours before my SR - fair
number of stations worked
2008 - daily JA sations in her
Hi Jack
One question in regard to your drawing of the 160m antenna you use with
K2AV's FCP counterpoise. Are you using a resonant quarter wave antenna
(i.e. about 132' total length) with the counterpoise, or an extended
inverted 5/16 or 3/8 wave antenna? I am guessing the former, but am also
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