Bryan,
Thank you for your kind comments. I'm pleased you enjoy the site.
Mahalo,
Mack
W4AX
On Wed, Nov 28, 2012 at 1:38 PM, Bryan Buck wh...@hawaii.rr.com wrote:
Nice job Mack. The W4AX is very simple and easy to use.
Just wanted to drop you a note of appreciation.
For me in
Last month, W8NN and I delivered a presentation to the SouthEast Michigan DX
Association (SEMDXA) titled Using the RBN as an Antenna Performance Tool.
You can download the presentation from:
http://www.k8ut.com/tiki-list_file_gallery.php?galleryId=2
Among the topics is a description of our
This is very convenient for me. Can I just put up two of these
side by side a foot apart and have a differential impedance of
around 600 ohms?
A two-wire Beverage operates in two modes, common mode (antenna) and
differential (transmission line) mode.
The common mode works correctly and
I have made numerous attempts to detune my vertical over the past
6 years. I admit at this point I have no idea what I did wrong or
what to try next. I have what I believe to be evidence the vertical
is interacting significantly with the several Beverages, which of
necessity are close to it. I
Yes, there is a section on the reversebeacon.net website where you can
download data files with all the historical spots.
http://www.reversebeacon.net/raw_data/
Matt NQ6N
On Wed, Nov 28, 2012 at 8:16 PM, wa3...@comcast.net wrote:
I am planning a new 160m transmit antenna to be erected in
I have a 100 ft 45G, shunt fed tower with stacked monobanders for 80 -10
meters. This includes a 24 ft mast with 12 feet out the tower top. I do
not even worry about detuning it.
The shunt (4 wire) cage only goes up to 30 feet due to monobanders down
to about 35 feet. It requires a 2000 pfd
Rick,
Why don't you just mount them on permanent posts (or trees) 10' high?
That's what I and many others do. That ought to let you mow around them
without taking them down. My support posts are 100' apart.
Two 10' high 14 AWG wires spaced 12 would have an impedance of 710 ohms.
The impedance of
Correction: In my last message, I calculated the impedance at 60 high.
These are the impedances at 120 high:
Two 10' high 14 AWG wires spaced 12 would have an impedance of 710 ohms.
The impedance of both wires to ground would be 357 ohms.
73, Mike
www.w0btu.com
I'm hearing a lot of noise with my triangle array. I was hearing it
close to the house so I relocated 100' away albeit 10-15 feet lower.
Unfortunately I can not put it in a clearing and there are trees
around it, I cut down several that were within 10' of the elements. I
am using flooded coax
Clarification; The Tx antenna is 350' from the house, the triangle
array is 75' from the radial plate. I have 60 130' radials, half on
the salt marsh.
snip
By necessity, the
transmit antenna is 75' away and some of the 130' radials on the
ground run fairly close to the Rx array. I find the
On 11/29/2012 2:55 AM, Larry Gauthier (K8UT) wrote:
Especially on 160 meters, results varied widely from day-to-day; even
from hour-to-hour. You may find the same is true by looking back
through the history of spots for your old antenna as you compare it to
your new antenna.
I strongly
yes it is, although the quietest directions are to the N, NE NW
which would make those directions the worst if it were the rail
lines.
I'm finding that the Rx triangle has more noise than the 160 Inv-V
and that doesn't make sense to me yet. I don't use a pre on the low
bands sometimes use
Hi Paul:
I have a small rotating terminated loop receiving antenna which is located only
20 feet from a Inverted L - FCP (folded counter poise) transmit antenna.
The amount of noise re-radiated from the inverted L to the terminating loop is
very high, over S9. ( receiver sensitivity -128dB
No, I didn't spill my beer.
But I am having very good experience with the roughly 300 foot Beverage on
Ground that I just put in at my house. It is fed through a 300 ohm transformer
and runs in the only direction where I can get a 300 foot run. It is made of
insulated #14 wire and
A UHF connector won't flash over at 1500 watts if the VSWR is low.
Dave WX7G
On Nov 29, 2012 9:04 AM, John Harden, D.M.D. jh...@bellsouth.net wrote:
I have a 100 ft 45G, shunt fed tower with stacked monobanders for 80 -10
meters. This includes a 24 ft mast with 12 feet out the tower top. I do
The problem is apparently within the K3 the antenna.
Used an adapter to run the BNC connected Rx antenna into the main
antenna and there's a night day difference.
Now to contact Elecraft for their thoughts on the matter.
thanks to Lee from Hi-Z who contacted me to help me figure out
After watching these kind of results for months and months until I was
bleeding from the eyeballs, I came to some conclusions.
1) There are calm steady propagation nights, and there are wildly varying
propagation nights. The former is like a windless night, and the latter
windy. The latter is
You may want to take this onto the Elecraft reflector, but I would
definitely check all the K3 sub RX mini coax connections and make sure they
are seated properly and firmly. All you need is for one of the shields not
to be properly connected because the plug is not in all the way. Been
there,
With an Amphenol Type HN connector there is never any flashover.
SO-239's did not cut it. Type N is even worse.
A UHF connector won't flash over at 1500 watts if the VSWR is low.
Dave WX7G
HVN connectors will hold off about 5000-6000 volts peak. I used them a lot
in high power plasma
On 11/29/2012 8:14 AM, Mike Waters wrote:
Rick,
Why don't you just mount them on permanent posts (or trees) 10' high?
That's what I and many others do. That ought to let you mow around them
without taking them down. My support posts are 100' apart.
Thanks for the suggestions, but...
Fellow Topband DX-ers:
Again this weekend the ARRL presents the worst and most unfair 160 meter
competition ever devised. I must sound like a broken record on this
problem but I have sent letters and e mail to members of the CAC to
asked them to allow the US Territories to be what they are
On 11/29/2012 3:15 PM, Herb Schoenbohm wrote:
Again this weekend the ARRL presents the worst and most unfair 160
meter competition ever devised.
If you think it's unfair from your QTH, try working it on the west
coast. West coast contesters have grown VERY tired of participating in
Gary, My mistake it was a different TB Gary K9AY that did the 160 Meter
ARRL Contest write up for QST. As they say, I had the right church but
the wrong pew!
My apologies.
Herb, KV4FZ
On 11/29/2012 7:43 PM, kd9sv wrote:
Herb, you mentioned that I had a write-up in QST...what or when
We can look forward to Stew Perry
Bob AA6VB
Sent from my iPhone
On Nov 29, 2012, at 3:54 PM, Jim Brown j...@audiosystemsgroup.com wrote:
On 11/29/2012 3:15 PM, Herb Schoenbohm wrote:
Again this weekend the ARRL presents the worst and most unfair 160 meter
competition ever devised.
I built an Inverted L for160 meters following K2AV's intructions for the
FCP, using the Balun Designs' isolation tranformer. It resonates around
1813 kHz (that's OK with me) but the SWR is 1.9:1 minimum, which my Yaesu
Quadra amplifier does not like. The feed point is at 8.5' high, 25'
So what does your car radio say to you set to a quiet spot at the top of the
AM band?
Have you eliminated your own property by killing all power and run the K3 on
a battery?
Carl
KM1H
- Original Message -
From: Gary Smith g...@ka1j.com
To: Topband@contesting.com
Sent: Thursday,
Ive never had a quality UHF arc even with a 5:1 VSWR of either sign at
1200-1500W. Never tried an import.
Carl
KM1H
- Original Message -
From: DAVID CUTHBERT telegraph...@gmail.com
To: John Harden, D.M.D. jh...@bellsouth.net
Cc: topband@contesting.com
Sent: Thursday, November 29,
- Original Message -
From: Ashton Lee ashton.r@hotmail.com
To: topband@contesting.com
Sent: Thursday, November 29, 2012 1:20 PM
Subject: Topband: Beverage on Ground
No, I didn't spill my beer.
But I am having very good experience with the roughly 300 foot Beverage on
Ground
Sounds like a problem many would love to have!
When you say they work best at 1-3' how exactly do you mean and what are the
antenna details?
Getting more info on what others use is always good.
Carl
KM1H
- Original Message -
From: Richard (Rick) Karlquist rich...@karlquist.com
To:
Hi Dave,
I suspect your problem is similar to my initial 160m Inverted L
installation - that being the part about your radiator sloping down to
25'. Due to problems very similar to yours, I eliminated any downward
slope I had initially, and made the whole thing horizontal to the earth,
and
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