250 Hertz with a K3 is quite narrow. I open up to my 450 Hz 8 pole
(marketed as 400), and unless I'm desperate, leave a hole alone if I can't
put runs above and below fairly well down the skirts. That said,
encroachment that only the 350 Hz 8 pole (marketed as 250) will handle is
getting to be
I have pulled this thread from the Elecraft reflector as it has broad
application and seems to particularly specific to the topband audience.
The just past CQ 160 was my first 160 contest using diversity (K3) and an RX
antenna.
Using an extension of some successful experiences with BOG arrays I
I have to vote with Herb.
Further there will always be disadvantages to those without monster
stations. There will always be advantages or disadvantages to various
locations on the planet. One CANNOT create a level playing field for all
entrants. That is why there are classes of operation, and
If you model the RX antennas with the TX antennas in the model, and then
without, you can see the change in RX pattern, usually with the loss of deep
nulls. Some situations you can get extreme interactions and reversal of
pattern or loss of any directionality. Better to model with your
I draw the line at claiming a contact when either did not actually get it
over the air.
I draw the line at using non-over-the-air to fix a log, whether contest or
DXCC credit.
It is clear that there is still magic in talking to VP8ORK running 100 watts
on 160 meters. I looked at their on-line
This question is the same for actual antennas as it is for modeled antennas.
The performance of a real world and modeled 160m vertical antenna is almost
entirely determined by the nature of the radials and the dirt involved. We
talk about it as if the vertical 120 feet is the essential element,
It would be of some considerable use to know exactly what you
summarize in saying:
On Tue, Apr 26, 2011 at 9:28 PM, k...@optimum.net wrote:
I tried to use toroid as loading inductance, but it did not work well.
I can guess what didn't work well, but I would rather hear your details.
73, Guy.
Probably is, somewhere, at some price, and possibly with minimums.
The RG6 style is sold in huge quantities, really a default feedline
for many things. Digging required, unless you're lucky and someone
has seen it. The digging required is part of the PITA. And with
that many shields, whose
Hmm,
Don't get low angle, high angle confused with sky wave. Both low and
high angle are sky wave, as opposed to ground wave which is a
different mode of propagation that is always local. You do not work
DX with ground wave. Ground wave goes as far as you can hear 540-1700
kHz AM BC stations in
If you are in a quiet location, you may find it difficult to hear
better than your TX antennas, simply because they are not
disadvantaged by the normal issues over flat ground. Vertically
polarized signals do not bounce well off dirt. Essentially not at
all, even with the best dirt found around.
Glad to have been of service.
The way you model an antenna on a slope, is to SLANT the ANTENNA the
same as the angle of the slope, if it's actually pulled true vertical,
and then print out the plot. On the plot draw a line through center
at right angles to the antenna's vertical. Anything below
On Fri, Aug 12, 2011 at 9:38 AM, ZR z...@jeremy.mv.com wrote:
Can you phase 2 wire reversible Beverages such as the offset close spaced
type?
For the part of the question before the such as.
Yes, you certainly can phase two reversibles, but you won't be able to
do it unless you can insure
Well, not so quick.
High end academic research on radials and related ground interactions
effectively ceased in the 1940's when commercial broadcasting got their
solution in FCC standards for commercial MF AM broadcasting antennas. It
ceased when the money for research predictably dried up. The
In version 5 EZNEC, in the WIRES window, click on Create in the menu bar,
then click on loop in the drawdown menu. 73, Guy.
On Wed, Aug 24, 2011 at 1:46 PM, DF3KV df...@t-online.de wrote:
Just create a loop with 200 sides
73
Peter, DJ7WW
-Original Message-
From:
As to charring -- that's an issue if the device in question is seeing a
lot of dissipation. Properly designed and applied, chokes should NOT
see a lot of dissipation unless they are being used in series/parallel
combinations to do impedance transformation.
73, Jim Brown K9YC
OR, if the
Hi Mike,
The following is assuming that you would not knowingly throw away dB on
suboptimal 160 antenna construction, provided the issues were manageable in
your situation. I have clear evidence, for years now, that a local 160 QRP
operator, with the following issues properly dealt with,
The problem would be that you need to trap out the BC signals BEFORE they
reach the tuning diodes. In the good ole days with signals that were no
more powerful than now, a small antenna, a coil, capacitor, and a diode
would produce enough rectified audio to drive a pair of headsets WITHOUT any
It's bccc
Band is back in NC. Worked Don, G3JMJ through the QRN at 0450Z. 449 and
buried under QRN peaks 9+20. Base noise only S5 at 150 Hz bandwidth.
Listened later, signal getting louder.
Hearing IN3RSV.
Worked G3PQA at 0515. 459. Solid 569 later on sending CQ on 1834.
RX
This is an answer to an off reflector conversation, relating to a too long
electrical length over radials reducing performance. I am writing to the
list since the subject and it's objection occur in so many posted
conversations. Reduction of gain by too high current max has been touted by
some
(which would of course require far fewer
radials) ?
Thanks,
Mike
www.w0btu.com
On Fri, Sep 16, 2011 at 11:03 AM, Guy Olinger K2AV
olin...@bellsouth.netwrote:
This is an answer to an off reflector conversation, relating to a too
long electrical length over radials reducing performance
I share the frustration over the very minimal amount of data out there.
However...
Erection of a 260 foot vertical in a testing environment fairly well
requires the facilities of a large antenna range to do the comparisons
below. Thus we are also talking about money, and we are talking about a
See http://www.fybush.com/sites/2005/site-051028.html
For 1530 kHz, that's a PAIR of two vertical halfwaves in phase. 50 kW
gives 3545.89 mV/m. Note the relative lack of neighbors, and therefore lack
of 24 hour miscellaneous diodic signal demodulation, talking window screens,
permanently lit
PM, Milt -- N5IA n...@zia-connection.comwrote:
Guy,
Do I read the article correctly that there is little grounding and no
radial screen under these monsters. Is that correct?
Milt, N5IA
-Original Message- From: Guy Olinger K2AV
Sent: Friday, September 23, 2011 1:43 PM
To: he
EZNEC's fresh water selection shows a conductivity of .001 (very
unconductive). So it's talking about Great Lakes fresh water away from urban
polution. Question would be how conductive the swamp water is. I would
personally guess that if the area is heavily vegetated and slow draining,
the
systems some are forced to live
with, having high angle radiation may actually be a considerable advantage.
On Sat, Oct 15, 2011 at 11:33 AM, Guy Olinger K2AV olin...@bellsouth.netwrote:
Particularly for the very minimal radial systems some are forced to live
with, not having high angle
Part of the discombobbled nature of this RG6 discourse might have to do with
a lack of detail on failure modes, dissipation, etc.
With a long run, say 200 feet, running 1.5 K, and let's say dissipating 400
watts, that would be dissipating two watts per foot, or 0.17 watts per inch.
If you placed
Too simple a formulation of issues.
The loss is ground induction, by *whatever* means. You appear to be
thinking that the radials are the only source of induced current loss in the
ground. The vertical radiator has that kind of loss as well, if you are
not talking about *dense* uniform
This IS true for some hams, because their counterpoise situation is quite
lossy. It would definitely not be true over a commercial dense radial system
that was in good repair. It's very easy to measure by starting with a dense
radial system and removing radials between subsequent measurements.
Part of the mechanical problem of this is that two back guys to the
top of the vertical, and then the wire pulling away horizontal, exert
a downward compression force on the vertical, to the tune of 20 or
more pounds if there is a wind blowing. Visualize a bowling ball or
two on top of the
I'll have to counter that the two radial figures in your quoted RCA
study are not about defining what goes wrong with minimalist and
miscellaneous downward extrapolation of dense and uniform radial
systems. It's about setting a context for the main purpose of the
study which is the superior
On Thu, Nov 10, 2011 at 6:41 AM, Dennis OConnor ad4hk2...@yahoo.com wrote:
There is no need in a ham antenna installation for all the radials to be the
same length...
This is only true to any degree if you are talking about buried, BARE
radials. If also uniformly spaced, elevated or insulated
Much closer to the heart of it now... Interspersed.
On Mon, Nov 14, 2011 at 8:03 AM, Richard Fry r...@adams.net wrote:
Guy - some selected comments to your recent post on this topic...
And here we are many years later trying to use their study, which
SERIOUSLY
duns 15 and 30 radials, to
This antenna started out as a U, but in trimming it back to
resonance (folded counterpoise plus isolation transformer plus antenna
length), the down part of the Us up, over and down got nearly
eliminated. There are four other stations using these who do not wish
to be identified, who have used
. That's a lot less than the ten dB accuracy range
needed to positively identify really sucky radial systems as really
sucky.
73, and may your 160 antenna make you happy,
Guy.
On Wed, Nov 16, 2011 at 12:22 PM, Richard (Rick) Karlquist
rich...@karlquist.com wrote:
On 11/15/2011 9:10 PM, Guy Olinger
published it already. His
break-even point would appear to be at the 4 loaded 1/8 wave radials,
and I agree with him.
73, Guy
On Wed, Nov 16, 2011 at 11:06 PM, Rick Karlquist rich...@karlquist.com wrote:
Guy Olinger K2AV wrote:
Counting FCP segments 1 through 5. 33 feet per segment. Directions
Hi, Carl,
I repeat, a folded counterpoise is NO substitute for a dense and
uniform system, which is what you had in the end.
My question for you is if you had a 70 x 10 foot strip of that rocky
stuff to construct a counterpoise, and that was all the space you had,
period, and your neighbors
In places where you can't get an eight foot rod to go down, there are
alternatives. A four foot rod, or driving the rod down at an oblique
angle will add some resistance, but not enough to change much.
Another method is to dig a hole as deep as you can go (two or three
feet), bury a metal plate
I'd ask the question differently. If you have before data, and can
remeasure after you hook them together to get some after data, and
you are trying to advance science, go for it. But otherwise begin
from if it ain't broke don't fix it. What is wrong, and what do
you KNOW you stand to gain by
On Sat, Nov 19, 2011 at 2:38 PM, Herb Schoenbohm he...@vitelcom.net wrote:
So the answer is a better ground on the Beverage ends may not buy you
muchbut could it hurt you?
I am looking for a db here or there which i
probably will never see. IMHO the Beverage grounds, or lack thereof
Models are very good in relative comparisons, with some very important caveats.
1) Hold everything possible constant between the two models, EXCEPT
the singular issue(s) you are trying to trend. Don't try to vary
dirt. If you don't already have burn scars and embarrassing gaffes
about dirt, you
It's pretty much demonstrated that there are a lot of people who are
tone deaf, that is, they simply cannot tell apart two tones of
different frequencies if they are somewhat near to one another.
This is an audible approximation of color blind. Since this does not
produce a problem in day-to-day
Note: the following is not a theoretical or untested antenna. There
are working antennas in the field using the folded counterpoise
described below, scoring well in contests**, in use up to a year and
more. Contest scores of the sort attained are not made using antennas
with significant
- Bill--W4BSG
- Original Message - From: Guy Olinger K2AV
olin...@bellsouth.net
To: Jim Miller Waco Texas WB5OXQ wb5ox...@grandecom.net
Cc: topband@contesting.com
Sent: Wednesday, December 07, 2011 7:57 PM
Subject: Re: Topband: Best small space antennas
Note: the following
Just a word on ferrite beads, and other kinds of baluns. Trust us, if it
could be done wrong, we blew it, if it could burn, we burned it, if it
could be cracked, we shattered it, if it couldn't stand up to 1.5 kw, we
smoked it. We tried every possible short cut and cheep trick imaginable.
Message-
From: topband-boun...@contesting.com [mailto:
topband-boun...@contesting.com]
On Behalf Of Steven Raas
Sent: Thursday, December 08, 2011 10:59 PM
To: Guy Olinger K2AV
Cc: Mike Waters; topband
Subject: Re: Topband: K2AV 160m Folded Counterpoise Antenna - New
DetailsPosted
Im
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
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
Stick with the T300A-2 and twenty bifilar turns if you want the inductive
residual of the isolation transformer to mirror the capacitive residual of
the folded counterpoise for the simple installation with roughly 130 feet
plus or minus, after the pruning.
Working on getting the Wireman to stock
For those building an isolation transformer for a 160M 5/16 FCP -- PLEASE
READ! IMPORTANT!
Martin has the right instincts, says it feels fishy for this. But it's
worse than he thinks. And don't even consider using ferrites.
The T300A-2 core and 20 bifilar turns were SPECIFICALLY chosen to
:
There is no such thing as an Amidon T-300 or any other toroid. In this
case they are just a reseller of Micrometals powered iron products.
Carl
KM1H
- Original Message - From: Guy Olinger K2AV
olin...@bellsouth.net
To: Martin hamra...@vr-web.de
Cc: topband@contesting.com
Sent: Thursday
. We have the
hard-won results that prove out Sevick's and our choices.
73, Guy.
On Thu, Dec 15, 2011 at 2:58 PM, Rick Karlquist rich...@karlquist.comwrote:
Guy Olinger K2AV wrote:
Martin has the right instincts, says it feels fishy for this. But it's
worse than he thinks. And don't even
#97 is the wrong material. You need material #2. #2 has red paint.
http://www.ebay.com/itm/MICROMETALS-T300-2-IRON-POWER-TOROID-3-CORE-PAIR-NEW-/130528349950?pt=LH_DefaultDomain_0hash=item1e64188efe#ht_651wt_1104
On Thu, Dec 15, 2011 at 7:30 PM, MIKE DURKIN patriot...@msn.com wrote:
Would
Hi Larry,
For a tribander on a mast, just use one inch diameter conductor for the
mast, the boom and the first and last 20 meter elements. For a 40 linear
loaded 2 element, similarly model the mast, the boom and the non-driven
element as if you unfolded and stretched out the linear loading.
) DC-1 MHz, high perm. u=75
73, Guy.
On Thu, Dec 15, 2011 at 10:50 PM, ZR z...@jeremy.mv.com wrote:
- Original Message - From: Guy Olinger K2AV
olin...@bellsouth.net
To: rich...@karlquist.com
Cc: topband@contesting.com; Martin hamra...@vr-web.de
Sent: Thursday, December 15, 2011 10
especially when
discussions get a bit confusing..
http://www.micrometals.com/software_index.html
We should all strive to be on the same page
Carl
KM1H
- Original Message -
*From:* Guy Olinger K2AV olin...@bellsouth.net
*To:* ZR z...@jeremy.mv.com
*Cc:* rich...@karlquist.com ; topband
The short answer is you have two choices. De-resonate the TX antenna
during RX or get at some distance from the TX antennas. Your modeling is
telling you what the interactions are, and therefore telling when you have
succeeded and when not. Coming up with the solution on a given piece of
land
Just remember that an FCP is a SINGLE BAND device. If you use a 160 FCP on
80 meters, the field cancellation will not occur and it will be lossy.
Second, the gorilla in the room for QRP is eliminating loss. Wind the 160m
isolation transformer (ISOT) as specified or get the Balun Designs
Hi Bob,
I had a look at your QTH via Google Earth. Would appear that the only
support you have is your tower. And on something like a 65 x115 corner
city lot.How tall is your tower?
73, Guy K2AV
On Sat, Jan 7, 2012 at 10:08 PM, Bob K6UJ k...@pacbell.net wrote:
The reason I am trying a
Gut suspicion is that you have a relay with fused contacts or blown
coil or some such, and your ACTUAL connections inside are not not what
you would be expecting from the schematic. Or maybe a burned up trace
or something.
On Thu, Jan 19, 2012 at 5:33 AM, Josep ea...@ea6bf.com wrote:
Hi all,
Worked them during a 12 period right on 1812. He was only listening
exactly on 12 and at the time was clearly having a hard time hearing. 73,
Guy.
On Wed, Jan 25, 2012 at 1:49 PM, N1BUG p...@n1bug.com wrote:
I listened to HK0NA this morning around 1.8328 and he was sending
12 after his
Sometimes the only symptom of common mode connection to your antenna is
excessive ambient noise, usually from the AC wiring system in the house.
A on/in ground radial field is not a monolithic single very low Z entity
for purposes of figuring out what is happening in the current division
exercise
The actual ratio, or incidental winding to winding capacitance,
particularly on 160m, is pretty immaterial. What is accomplished by the
isolation transformer is simple removal of all possible current paths along
a conductor. The various bead choke, wound balun like devices, etc, all
have a
Yup. Metal to metal contact with the radials, folks don't have a good
mental summarizing device for radials, thinking that ground is some kind
of sucking everything up magic medium. Text below...
73, Guy.
On Fri, Jan 27, 2012 at 6:10 PM, Charles Moizeau w...@msn.com wrote:
Guy,
Your text
Well, maybe they have been good at your QTH. Here, the conditions to
Europe have been the worst in recent memory. Just fleeting peeps of Europe
barely working through. Only honestly R5 signals were from Portugal. One G
was R4, and the rest, what few of them there were, were R3. 73, Guy (Apex,
I'd say the conditions seemed good from East of Mississippi to East of
Mississippi. They were especially good from NC to MN and IA, go figure
:). But conditions from NC to the west coast were AWFUL. From PAC the
usual 569, 579 KH6CC was R2 at best, and was only up to that elevated
level for a
I may have missed it somewhere, but where physically is the choke on the
entire run of the coax from the antenna/isolation transformer back to the
transmitter? Some commentary appears to assume you have it placed right
next to the isolation transformer. Is that true?
73, Guy
On Fri, Jan 27,
Oh, yeah. It will. If you are unlucky and it is presenting a current node
at the antenna connection. All the MORE likely if you have a really good
ground at the house entry point. Get used to it. Each little wire running
off from the center is a **DRIVEN** element in the system, and if the coax
Well, Cackle Fersus got up that morning and forever afterwards swore
something was bent about the day. Nothing has seemed straight or screwed
on all the way ever since, and probably won't ever be, unless he can find
the True Monopole.
The morning started out with what was left of a dream that
Sorry, ain't finished, but it will be along. Dunno what I hit that made it
send. Tree, if you see it first, please pull it. 73, Guy.
On Tue, Jan 31, 2012 at 6:51 PM, Guy Olinger K2AV olin...@bellsouth.netwrote:
Well, Cackle Fersus got up that morning and forever afterwards swore
something
PART TWO
-
Finding the True Monopole was going to cost time and money, thought
Cackle as he walked back down the steps.
Was he still in his haint dream?
Cackle mindlessly walked straight across the middle yard on one of the
crossing walks and stopped at a sidewalk intersection to look
My ATT field guys had nothing particularly good to say about CAT5.
And they also were very negative about putting ferrites. But they
***WERE*** correct about the ferrites causing additional errors when
the CAT5 run was marginal. I personally observed this myself. I
will not attempt an
The CAT5 in question for the interference is the INPUT side of the gateway
box. This is sometimes used from the loop termination on the side of the
house somewhere to the gateway box. THAT was the CAT5 sensitive to the
ferrites. Ethernet on the output side of the gateway has not been an
issue.
The answer to this one comes in several parts.
Your antenna is composed of a pole (the up 40 and out 20) and a
counter-pole (your elevated loaded radials). Power is DRIVEN into
BOTH of these necessarily. Contrary to a dipole (where pole and
counter-pole are identical and opposite, and both
PART THREE
-
Cackle was sitting up in his bed, dreading going to sleep. This is crazy,
speaking aloud to no one else in the room. None of this makes sense. None
of this is worth losing sleep. Cackle laid back on his pillow and reached
up to turn off his reading light, plunging the room
PART FOUR
-
There staring Cackle in the face was THE image of the monopole from
Elmer's I-pad in his dream. Elmer the Haint surfs the internet. he said
aloud. Elmer's right, no way that's a monopole. A long pause, as he
stared at the photo. But it's not a five pole, either. Cackle
According to either the ARRL ANTENNA HANDBOOK, or ON4UN's LOW-BAND DX
HANDBOOK, the velocity factor of insulated wire placed atop the ground is
50%...
Unfortunately, and inconveniently, not to cast aspersions on anyone, BUT
actual measurements in the Raleigh area showed that velocity factor
Pardon the dyslexia. Mr. Doty is W7ACD not W7ADC.
On Fri, Feb 10, 2012 at 1:21 PM, Guy Olinger K2AV olin...@bellsouth.netwrote:
Have a read on W7ADC's (the excellent Mr. Archibald Doty) work in NCJ on
radials. 1983 and 2011. Note the variability in the SAME dense radial
field, and his
The 120 comes from the watershed 1937 Brown Lewis and Eppstein study now
found in the IEEE journals. There were distinct characteristics to 120
times 0.4 wl (actually 115) that improved results even vs. 60.
That a deficient radial system on one side has any significant reduction in
that direction
could come up with a dozen speculations about it, but
that's all they'd be.
-- Guy.
On Fri, Feb 10, 2012 at 5:13 PM, Herb Schoenbohm he...@vitelcom.net wrote:
On 2/10/2012 5:03 PM, Guy Olinger K2AV wrote:
The 120 comes from the watershed 1937 Brown Lewis and Eppstein study now
found in the IEEE
Yes, FCP *was* originally designed to get small-lotters on top-band. My
buddy Jack downsized and tore my heart out with his moaning about what he
had done to his 160 results. But watch out when you say just. FCP has
opened Pandora's box on the murky area of counterpoles for 160. We have
the
We've had three contests in a row where Friday night 160 was really stinky.
Will we have three in a row where Saturday night was a whole new deal?
At least that long line of thunderstorms off shore that stretched from GA
to New Brunswick will be gone with the front. In North Carolina the band
Well, I might agree with you Jim, if all the states and provinces weren't
multipliers. And that the strategy of winners for 160 contests is to WORK
ANYTHING THAT MOVES. If you hear it, work it. Doesn't matter if it's east
coast or west coast or DX.
Personally my limiting factor is being able
Beverage antenna running up the mountain to intended direction does not
inspire confidence for some number of reasons. What kind of soil is
underneath it?
Pennant, K9AY, or an array of same, something that rejects back and side,
and hears high angle well would seem better suited. Maybe Waller
CT1FJK 579 with very fast QSB 1832.5. Band is open. Solar effect from on
coming wave?
73, Guy
___
UR RST IS ... ... ..9 QSB QSB - hw? BK
I dont know if Id trust trying to use a resonant dipole on the ground to
determine the VF of a non resonant wire. In any case keep the VF at about
.6
or higher when determining the maximum length of the BOG, Slinky, or any
other Beverge form.
Carl
KM1H
It was clear there was a lot of
Only if they have space for them.
On Mon, Mar 19, 2012 at 10:59 AM, K4OWR k2...@comcast.net wrote:
When I switch to my beverage antenna the noise pretty much goes to
almost nothing.
Don't most serious operators have oneor more???
BILL K4OWR
On 3/19/2012 10:22 AM, N7DF wrote:
When you say quieter, is that comparing signal to noise on a common
signal, or just listening to the level of noise raw from the two
antennas? 73, Guy
On Tue, Apr 10, 2012 at 8:49 AM, joe gali...@comcast.net wrote:
I am experimenting with a small one meter square loop. It is 5 turns of
#14
Understanding the nature and pattern of a single antenna pattern is key to
it's use. One bright possiblility, since the loop is so small to begin
with, is to overcome pattern with multiple loop antennas and phasing
(that's multiple antennas in separate locations). If you are in a
situation
And your point is ??
That is not the only place where substitute arithmetic will produce a
different figure. You can do the same with ground losses in the immediate
vicinity, where if you do anything except the Norton-Sommerfield
estimations you come up with a different figure. NOBODY has
One really needs to evaluate the usefulness of 5 degrees and under in a
case-by-case basis. Most people in populated areas have 5 degrees
completely obliterated by conductive and semi-conductive clutter...houses,
trees, overhead powerlines, buildings, yada yada. And probably 10 and 15
degrees are
On Tue, May 22, 2012 at 9:28 AM, ZR z...@jeremy.mv.com wrote:
It could be possible that the commercial transformers are providing a suck
out . Try tuning well on both sides of 40M and see if this is a gradual or
sudden thing.
Beat me to the punch. Too long together with transformer
a licensing agreement with PDS (aka DX Engineering).
73, Tony
On Thu, May 31, 2012 at 11:05 AM, Guy Olinger K2AV olin...@bellsouth.net
wrote:
They have not removed the Legal Troubles banner from their web page
yet.
73, Guy
On Thu, May 31, 2012 at 10:58 AM, Larry Emery k...@uninet.net wrote
The easy way to do that is with a relay between the coax center conductor
and the L wire at the feedpoint. When the relay is open, that makes the L a
1/4 wave on 160 which is not self-resonant. The quarter wave is only
resonant in conjunction with whatever counterpoise you are using for the L.
The QRN was elsewhere this summer, out in the US Midwest and in a big
circle around KV4FZ, I think. So I was able to hear better than last year.
F5IN called for my only European contact. He was surprisingly loud. I
finally got through KV4FZ's ring of fire, worked W0KIT and KG7H for 5 and 7
If one's tower does not have radials, is set in concrete, with minimal
direct contact with earth (say less than a linear foot, with nothing more
than the usual lightning treatment attached to the base, then the base
connection is likely rather resistive RF, and strictly by itself the tower
is a
I said flooded a few sentences later. It appears that you (by inference)
use flooded everywhere outdoors.
I have gone over to flooded + PE jacket for all my RX cables for the last
three years, including TV AND indoors and DO NOT use anything else. The PE
jacket lets me know what kind it is,
On Thu, Jun 21, 2012 at 2:59 PM, DAVID CUTHBERT telegraph...@gmail.comwrote:
The W7NQN line filter is a differential-mode filter. You need a filter that
is designed for common-mode filtering.
Dave WX7G
This is from the web page advertisement:
-
Compare this with a Brand C filter
Olinger K2AV olin...@bellsouth.net wrote:
On Thu, Jun 21, 2012 at 2:59 PM, DAVID CUTHBERT
telegraph...@gmail.comwrote:
The W7NQN line filter is a differential-mode filter. You need a filter
that
is designed for common-mode filtering.
Dave WX7G
This is from the web page advertisement
I had an 80 half wave inverted L, up 67 out 70 feet, made of #12,
strung with great difficulty between two tall trees, that really
worked well. The vertical came down to my tractor shed from the
western tree and went through the wall with insulation to an tank
circuit tuner on the inside wall. In
Hi, Steve. It has taken some time to get to this and do it carefully.
And sorry, some of the needed info WAS right there in your first post.
Some days I just read right over tops of things and can't see them to
save my life. But the specifics you returned in your second post are
significant
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