It looks like the KAT1 should be able to match it - have fun.
73,
Don W3FPR
> -Original Message-
>
> I only had 17' feet of ladder line, not the 30' I thought I had so
> this antenna is probably extremely far from ideal. The overall
> antenna is roughly 102' long in an inverted vee co
I'd like to thank everyone who replied. Here is what I just finished
building and installing:
I only had 17' feet of ladder line, not the 30' I thought I had so
this antenna is probably extremely far from ideal. The overall
antenna is roughly 102' long in an inverted vee configuration. The
end
i will be out on the Trail on Friday, 6/16/06, with my KX1, 10 foot whip and
a 15 foot drag wire.
i will be hiking in the Park operating pedestrian mobile during daylight
hours on 14,060 kHz.
The band isn't in real great condition so i will be weak.
All calls will be appreciated.
Paul
w0rw/pm
_
Minor scratches are OK. This material melts and fills the gaps between
the PA transistors and the heatsink as the devices heat up the first
couple of times. (That is one of the reasons we require tightening of
the transistor mounting screws after a initial short period of use.)
73, Eric WA6H
Well Vic, details, details, I meant that the beads do help in the near
center area, as they are quite long, as good bead chokes are.
Yes, outside the bead area, you should bring the line off as orthogonal as
you can; but in practice, the angular droop of the coax has not caused one
bit of feedb
Yes, in theory any vertical half wave that is center fed should have the
feeder run at exactly a right angle, but in practice, Force 12 provides a
support arm for the coax, and that is sufficient to bring the coax off a
couple of feet where it then can hang either parallel or at an angle to the
I know Fred, that the Sommer beam uses some cleaver loading techniques to
give multi band performance. I think he used the same loading on his
vertical element.
Stuart
K5KVH
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Thanks for all of the "vertical" tips and HF product
ideas. I didn't realize how many of these kinds
of antennas might be out there. Has anyone actually
used or seen a "Sommers" vertical? It sounds
interesting, but even on their website - there are NO
photos or even clear diagrams of what it mi
Hello Nick!
Since you already realized I am biased... :-)
External, no-control, DSP speakers usually have the following issues:
For SSB:
Notch filter has delay of a second or so. A carrier tuning up nearby
will be at full strength for a significant fraction of a second before
it is suppress
I'm considering which DSP option to go with - KDSP2 or one of the BHI
noise-eliminating speakers. They're both AF DSP solutions, the cost is
similar, but that's moreorless where the similarities end. I've
attempted to collect the other pros and cons...
BHI:
Plug in, it works.
can be used with
For the past nine years I have been using a Force 12 vertical half-wave dipole
on 30 meters. It was a one-off for me and at the time designated a ZR-30. I
have it mounted about 6 feet off the ground and the coax comes off the bead
balun straight to the ground and it works like a champ..there is
Looking for a good mast, Jerry?
Look here too:
http://www.qsl.net/dk9sq/
I have one for over 10 years now, holding up a 2x10 meter dipole fed with
400 ohm twinlead. Works great, even on 6 meters...
Collapsed, it is a mere 1.15 meters long and weighs 1 kg, at full length
is's 10 meters. Don't
If I remember correctly, the manual for the Sigma V says
to run the coax away from the antenna at ~90degrees as
much as possible to prevent coupling.
I had one of these in the past and was always amazed at
how well it performed for such a small antenna.
Greg-AB7R
On Tue, 13 Jun 2006 11:14
Hi, Vic.
Of course the pole has to be guyed as well.
I should have mentioned that using the short pipe with 3 steel rods
(about 1 foot each
extends into the ground), there is enough stability to support a 20
foot fiberglass fishing pole and a #26AWG 88ft dipole fed with radio
shack twinlead wi
Stuart Rohre wrote:
They are coax
fed,with bead chokes on the coax so that bringing off the coax from the
center is not a problem.
This isn't true. The bead balun solves the problem of current flow on
the outside of the coax which occurs when the feedline length is such
that the outside of
For Fred's antenna need:
I would investigate the Force 12 vertical antennas. I have used several of
the Sigma 5 model, (20 to 10) on science projects and they are durable, easy
to set up and take down, and work with high efficiency, equal or better to,
a dipole of full size. They are bar load
Keith, on the Force 12 verticals, which are true half wave (loaded)
verticals:
They provide a feedline support for about 18 inches or so out from the
center. After that, the coax can simply go to earth to the rig, or be
supported for a greater distance. Does not make that much difference in m
My 49 years of antenna useage has taught me it is bad to bring the high
voltage end of the antenna down close to the earth because of ground losses
due to the capacity of the antenna to earth. Not to mention the high RF
voltage induced into the shack.
My center fed antennas have all worked muc
I don't know anything about it other than what I read on the web
page, but the photos of HB9ABX's homebrew mobil antenna sure are intriguing:
http://www.datacomm.ch/hb9abx/antmob-e.htm
He has designs for a number of mag loop antennas as well, which
might fit your restrictions.
73 de chris K6DBG
Martin Gillen wrote:
Or homebrew your own sand spike like I did. 1 or 2 feet of 3/4" PVC
pipe, an pipe end, 3 stainless steel rods and a couple of jubilee
clips (hose clamps).
I made one simply by drilling a hole in the center of a PVC pipe cap and
putting a long bolt (about 4 inches -- 10 c
Rich,
I envy your ground conductivity. Also I appreciate your conclusion that when
facing challenges a simple vertical is better than no signal at all.
I'm curious as to how well you feel your vertical works, mounted on a fence
post the feed point must be fairly close to the ground, and you
Hi, Jerry et al,
It is a tube with a spike on one end
Or homebrew your own sand spike like I did. 1 or 2 feet of 3/4" PVC
pipe, an pipe end, 3 stainless steel rods and a couple of jubilee
clips (hose clamps).
Attach the pipe end piece to the pipe. It is probably slightly
thicker than the pi
Elecraft K2 - 02110 Rev B
EC2/100 - External 100watt amp with KAT100
KSB2 - SSB Option
K160RX - 160M / 2nd RX Antenna Option
KAT2 - 20W Internal Auto Tuner
KBT2 - Internal 2.9AH Battery
KDSP2 - Advanced K2 DSP Filter
KIO2 - AUX I/O RS-232 Interface
KNB2 - Noise Blanker
Perfect Condition, Pictures
Keith,
Actually, the Butternut does cover all the WARC bands. On 17 meters tuning it
is a bit touchy, but on 10 MHz and 24 MHz it is very well behaved and gets out
great. Using a tuner I even get a match on 5 MHz.
I have confirmed around 309 countries on my Butternut. And I live on a tiny
Actually, my antenna is similar. 28 Foot tall alum. radiator over a
field of sixteen 20 foot radials. Thirty feet of RG-213 connect the
antenna to the manual ATU in the garage. From there I run RG8x into the
shack. Changing bands requires that I go to the garage with my antenna
analyzer and adj
A good base for a portable antenna using telescoping poles is a surf
fisherman's sand spike...It is a tube with a spike on one end that one inserts
into the sand to hold an unattended fishing pole upright...Google it...
>I have been very pleased with my MFJ 33' mast. Easy to setup and takedown.
Hi Steve,
As long as you mentioned the inverted vee, I thought I'd offer this to think
about. I have been using a 20m center-fed inverted vee with very good
results. And here's the great thing about it... it's a coil of TV
twinlead. One end of the twinlead is split to form the two arms of the
- Original Message -
From: "n0tu/Steve" <[EMAIL PROTECTED]>
To: "qrp-l" <[EMAIL PROTECTED]>; "ElecraftLIST"
Sent: Tuesday, June 13, 2006 2:21 PM
Subject: [QRP-L] Feeding the Halfwave Ant
This may be silly question? I'm trying to cut down on set up time and
weight for my backpacking j
Steve,
If your tuner is of the L network type (like the Elecraft auto-tuners), it
will have a difficult time matching the high impedance of a half wave end
fed antenna. If you want something similar, use the W3EDP length antenna -
an 85 ft. radiating section with a 17 ft. counterpoise wire in pla
I just wanted to thank everyone for their help and advice re hooking my paddle
to k2 or other radio.
73 de Jesse W6JMM
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Steve,
IMO you will find more center feed halfewave antennas then endfeed halwaves
because at Home it is normaly not so easy to have the ATU directly to the
antenna without feeder line. Endfeed halfwaves with feeder line result in
high impedance coupling which is not so easy to handle.
If we tal
I'm vertical bound at my home qth also as well as in a restricted neighborhood.
I installed a 29' home brew self supporting vertical on one of my fence posts.
I then ran two elevated radials along the fence at 90 degrees, one to the north
and one to the east. Both are about 30' long.
I use an
This may be silly question? I'm trying to cut down on set up time and
weight for my backpacking journeys into the field with QRP gear. The
end fed halfwave or random wire 'sounds' good to me becasue of the no
feed line and a simple LC tuner can be used. Opposed to CF halfwave
with balanced tuner (
Hey Fred,
Verticals - it's all I run. I've played with them and researched them
off and on for several years. I'm no expert but here is a quick summary
of what I've learned.
Vertical efficiency depends on ground conduction in two fields. Near
field (which can be enhanced by radials) and far fi
Hi JT,
You could build a Delta loop, Bi-Square, Diamond Loop
all which would easily cover 40-10.
You could build a fan inverted Vee that would cover
80-10, maybe even 160.
You could build a series of verticals, use a Tee for
80M, raised radials on 40 thru 10. 50' is a decent
height for a Tee ver
Fred N3CSY asked:
I'm another limited space, restricted community
ham (for now). I've been considering different
types of verticals which might be best. I THINK,
I'm looking for an antenna which:
- vertical ?
- no radials
- no counterpoises
- no guy-wires
- 40 thru 10
- maybe 4 shor
36 matches
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