Re: Jim Brown’s comment.
>
> also linked to a long paper that studied the effect of mounting height on
> both horizontally and vertically polarized antennas.
Would you mind posting the link. I must have missed it in the traffic.
Thank you,
Ed McCann
AG6CX
Agree, Jim. I have read that one before as well. It was well done.
Dave
On 9/29/2022 9:41 PM, Jim Brown wrote:
On 9/29/2022 11:45 AM, David Gilbert wrote:
Yes, I've previously seen your paper on the vertical dipole with the
coax sleeve.
H Dave,
I also linked to a long paper that
On 9/29/2022 11:45 AM, David Gilbert wrote:
Yes, I've previously seen your paper on the vertical dipole with the
coax sleeve.
H Dave,
I also linked to a long paper that studied the effect of mounting height
on both horizontally and vertically polarized antennas. I consider that
one of my
I deployed an end fed on a Shakespeare Wonder Pole at a cabin on Lake George
one year. The landlord came by and said “what are you fishing for?”
“Electrons,” I replied. It turns out that he had always been interested in
amateur radio and we sat and ragchewed for an hour as I showed him my
Exactly particularly when they've been promised and the promised
updates are a few months late.
Lee, AA4GA
On Thu, Sep 29, 2022, 5:47 PM Mike Smith VE9AA wrote:
>
>
> p.s.-Wayne: updates would be nice ;-D
>
>
__
Elecraft mailing
On 9/29/2022 11:12 AM, Fred Jensen wrote:
Someone has called the sheriff on me twice while set up on a park bench
with my Alexloop. I suspect the AX1, with or without a counterpoise,
would be less likely to provoke someone to do that. One woman
approached me and asked me if I was the CIA.
The curious thing is that small consumer drones are getting to the point
where for operations like SOTA, a drone with a couple of spare batteries
could pretty easily support a full size 5/8 wire vertical fed against a
couple of radial wires suspended a foot or two off the ground, and do so
Dean,
I wish I could tell you. I ordered the same kx2 shack-in-a-box before Xmas
last year (after a short 1-2 month wait) and was overjoyed to receive it in
January. I love the rig btw.
They know there was no mic included,(I've sent emails, but there was nothing
indicated on my order
Indeed, that's why I put "insensitive" in quotes [and "ground" too].
Zero return current loss can be a large factor in improving vertical
antenna performance however. Field loss is inevitable, and is what
makes Beverages work, so I guess it's not all bad. I fed my Franklin
kludge with the
For sale: AX-1 antenna, AXE-1 40M coil, HB bipod and tripod adapter, small
table tripod. Excellent condition.
$125 shipped in CONUS.
73 Howard K4LXY
Howard Zehr
K4LXY
Radio blog: https://k4lxycw.wixsite.com/blog/blog
Photo gallery: www.howardzehr.com
I bought a KX2 shack in the box package back in February.
I received the radio around June but still haven't received the Mic.
Any idea when these will be available?
Thanks
Dean (K7DSF)
__
Elecraft mailing list
Home:
Mr. Burdick,
Will do. Thank you for the information.
WP4QZH/Victor
On Thu, Sep 29, 2022, 4:15 PM Wayne Burdick wrote:
> Hi Victor,
>
> Please check with support. I believe we have some extra cables laying
> around. You might mention you heard this from me.
>
> 73,
> Wayne
> N6KR
>
>
> > On
Hi Victor,
Please check with support. I believe we have some extra cables laying around.
You might mention you heard this from me.
73,
Wayne
N6KR
> On Sep 29, 2022, at 1:05 PM, Victor Rivera wrote:
>
> Hello.
>
> I am interested in purchasing a replacement cable for my Elecraft MH3
>
Hello.
I am interested in purchasing a replacement cable for my Elecraft MH3
microphone. I have attached a picture of the connector to the microphone
board area.
If anyone in the group knows where to find it, I would be very grateful if
you can share the information.
WP4QZH/Victor
For a similar 10M version, look at N1LO's 10M Wire Collinear Super J-Pole
which you can find at Nylo's Notepad Antenna Page. I have built and
installed several of these vertical antennas over the years, hanging from
tall tree limbs and stacked telescopic fiberglass poles.
My EZNEC model shows
The two half waves in phase gain their improved performance by being
spacially separate. The more you load it to shorten the two dipoles,
and the closer you arrange them, the less they provide any benefit. It
would have no benefit at all as a short portable antenna.
By the way, any
The Franklin is two vertical, co-linear half-waves fed in-phase. Google
will offer way more than you want to read. Obviously a large structural
challenge for a full-size one at MF. The one I built as a test was
heavily loaded and worked about like EZNEC-4 predicted. I think it's
Fred-can you share details on this antenna? Not familiar with it. Thanks.
Dan Presley 503-701-3871
danpresley@me. com
n7...@arrl.net
> On Sep 29, 2022, at 12:08, Fred Jensen wrote:
>
> I've long wondered why hams haven't done more with Franklin verticals? KFBK
> [1530 kHz in Sacramento]
Hi Fred,
I compared a similar loop to an AX1 and it was a wash. Stealth ops without
compromising your signal or police record :)
Wayne
N6KR
> On Sep 29, 2022, at 11:12 AM, Fred Jensen wrote:
>
> Someone has called the sheriff on me twice while set up on a park bench with
> my Alexloop. I
I've long wondered why hams haven't done more with Franklin verticals?
KFBK [1530 kHz in Sacramento] uses one located in the southern end of
the Sacramento Valley, and it's known as a Flame Thrower. I think KNBC
[680 kHz?] in SF had one back in the 50's sometime too. They're big at
MF, but
Hi, Jim.
Yes, I've previously seen your paper on the vertical dipole with the
coax sleeve. Interestingly enough, I independently came up with that
same idea many years ago, although I was never certain that I could come
up with a good enough common mode choke to make it work. Your cookbook
One year for Field Day, K7ZB and I were hanging several wire antennas
from the tall Ponderosa Pine trees along a forest service trail on the
Mogollon Rim in central Arizona. A car drove by and a woman got out to
ask us if we were setting snares for bears. She was serious.
73,
Dave AB7E
David,
I've published a LOT of work on concepts like this.
This ran in National Contest Journal about six years ago. It's based on
extensive modeling, and was peer reviewed.
http://k9yc.com/AntennaPlanning.pdf
This was added to the ARRL Handbook or Antenna Book several years ago.
Someone has called the sheriff on me twice while set up on a park bench
with my Alexloop. I suspect the AX1, with or without a counterpoise,
would be less likely to provoke someone to do that. One woman
approached me and asked me if I was the CIA.
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
You're talking about a horizontal pair of AX1's ... I asked about them
oriented vertically. That wouldn't require them to be as high above
ground as you mention and would still allow them to be carried
pedestrian mobile.
I modeled a vertical pair at the same height above ground (15 feet)
A vertical dipole does not need high above ground to work well. A good
shortened 160m antenna is a vertical dipole with the ends pulled into a C shape
to reduce the height.
John KK9A
Wayne Burdick n6kr wrote:
We studied this. To provide any advantage over a vertical AX1 with a single
We studied this. To provide any advantage over a vertical AX1 with a single
counterpoise wire, an AX1 dipole would have to be well over a quarter
wavelength above ground, with both halves tuned to resonance, and fed with
low-loss coax and a balun or balanced feedline. Even then the advantage is
Interesting idea.
72,
Rich Hurd / WC3T / DMR: 3142737
Grid: FN20is
Bureaucracy is always in search of self-preservation. — AA7BQ
> On Sep 29, 2022, at 04:14, David Gilbert wrote:
>
>
> Has anyone ever tried to used two AX1's back to back as a vertical (not
> horizontal) dipole? And if
Has anyone ever tried to used two AX1's back to back as a vertical (not
horizontal) dipole? And if so, how did its performance compare to a
single AX1 with the 13 foot counterpoise wire?
Just curious.
73,
Dave AB7E
__
Elecraft
29 matches
Mail list logo
