On Tue, 3 Mar 2009 07:28:12 -0500, Matt Palmer wrote:
I've been thinking of building one of these to play with, do you have
any ideas on how to stress relieve the point where you solder the wire
to the coax? This seems to be the weak link in the chain.
I use the inexpensive dipole insulator sold
On Tue, 3 Mar 2009 01:53:19 -, Geoffrey Mackenzie-Kennedy wrote:
Yes, I take your point. It is the fine tweaking of phase that I find easier
to do with a capacitor!!
Please tell me how you would do that with this antenna! :) The tweaking
involved requires nothing more than looking at my
Jim Brown
On Tuesday, March 03, 2009 at 4:34 PM, Jim Brown wrote.
On Tue, 3 Mar 2009 01:53:19 -, Geoffrey Mackenzie-Kennedy wrote:
Yes, I take your point. It is the fine tweaking of phase that I find
easier
to do with a capacitor!!
Please tell me how you would do that with this
Let's wrap up this discussion in the next 2 of hours. (2130 UTC) There
have been 26 posts in the last 24 hrs on this, which is hitting the
overload threshold ;-)
73, Eric WA6HHQ
Elecraft List Moderator
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Elecraft mailing list
I am using the 40m EndzFed at my QTH. It slopes from 10 ft outside my
shack to 40 ft up into a redwood tree. I do not have a lot
configuration for a decent 40M dipole. Although not recommended by
PAR, I have worked stations on 60 and 80 meters with it using the K3
autotuner.
I cannot
I have used a PAR end fed with my K1 at the beach. I feed it at the top and
run it from the condo balcony down at a slope to somewhere I can tie it off
where no one will run into it. It works very well - better than an Outback
vertical attached to the balcony. So far, no one has
I used a 10/20/40 last year at FD with good results. Usually if I could hear
'em, I could work 'em was true, with the QRP caveat. Top about 35ft. in the
air, bottom just a few feet off the ground. This was before I had my K3,
but used the T1 with my FT817 and even used it on six meters for a few
, 2009 1:16 PM
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] PAR endz-fed
I am using the 40m EndzFed at my QTH. It slopes from 10 ft outside my
shack to 40 ft up into a redwood tree. I do not have a lot
configuration for a decent 40M dipole. Although not recommended by
PAR, I have
Chuck
If your antenna is over salt water (even if that water in under the sand
which is under your operating position) you are going to be a VERY happy
ham. ANYTHING strung up of salt water will give absolutely fantastic
results!
Have fun with the PAR or anything else you use under those
On Mon, 2 Mar 2009 10:16:27 -0800, Randy Cook wrote:
HOW MANY OF YOU ARE USING PAR ELECTRONICS END FEDS
This is a VERY easy antenna to build. Why would anyone want to buy
what they can build in an hour for a fraction of the cost? See
http://audiosystemsgroup.com/NCDXACoaxChokesPPT.pdf
One
Onderwerp: Re: [Elecraft] PAR endz-fed
I used a 10/20/40 last year at FD with good results. Usually if I could
hear
'em, I could work 'em was true, with the QRP caveat. Top about 35ft. in the
air, bottom just a few feet off the ground. This was before I had my K3,
but used the T1 with my FT817
To: Elecraft@mailman.qth.net
Subject: Re: [Elecraft] PAR endz-fed
On Mon, 2 Mar 2009 10:16:27 -0800, Randy Cook wrote:
HOW MANY OF YOU ARE USING PAR ELECTRONICS END FEDS
This is a VERY easy antenna to build. Why would anyone want to buy
what they can build in an hour for a fraction of the cost
Hi, Jim.
I had thought about that concept years ago when I was doing more casual
QRP portable operation (camping, Flight of the Bumblebee-type stuff,
etc), but I never tried it because I just assumed that the impedance at
the end of a dipole (i.e., where the choke would be on the coax) was
For those that may be newer on the list that would like to see an
example of a good homebrew 1/2 wave end fed setup, here's a good one
(with pictures and schematic) on the QRP ARCI site. It was posted by
Steve Yates, AA5TB:
http://www.qrparci.org/content/view/59/55/
I've used a slight
Ron,
A few quibbles with your analysis. First, the antenna that I have described is
a simple half wave dipole, fed at a current maxima. The only tricky part is
the power rating of the choke that serves as the end insulator. My choke is
NOT a matching element, it an end insulator!
Second,
Jim Brown wrote on Monday, March 02, 2009, at 11:09 PM:
A few quibbles with your analysis. First, the antenna that I have
described is
a simple half wave dipole, fed at a current maxima. The only tricky part
is
the power rating of the choke that serves as the end insulator. My choke
is
Have you been able to verify that a simple choke really blocks the
shield current there?
Yes, it works -- IF the choke has a sufficiently high impedance.
Or am I misunderstanding something?
No. You can see another way to do this on N6LF's website.
73,
Jim K9YC
On Tue, 3 Mar 2009 00:15:04 -, Geoffrey Mackenzie-Kennedy wrote:
If a resonant trap is placed at the bottom end instead of a choke as an
insulator,
A coaxial choke wound on a ferrite core IS a parallel resonant circuit.
Properly done, the choke should be wound to place the resonant
Jim Brown wrote on Tuesday, March 03, 2009 at 12:59 AM
A coaxial choke wound on a ferrite core IS a parallel resonant circuit.
Properly done, the choke should be wound to place the resonant frequency
where the antenna will be operated! Study the references I cited in the
earlier post.
Yes,
Folks,
I fail to see the advantage of constructing an end fed dipole with coax
for half of the antenna - it requires a choke that has a parallel
resonant frequency equal to the operating frequency, and the overall
length is a half wavelength.
I believe it is much easier to construct a half
On Mon, 02 Mar 2009 22:48:03 -0500, Don Wilhelm wrote:
I fail to see the advantage of constructing an end fed dipole with coax
for half of the antenna
The advantage is if it solves a particular rigging problem that you
encounter.
73,
Jim K9YC
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