To further Paul's point , CW "readers" have been around for decades.
Automating the reply process on CW seems to me to be a "relatively
simple" programing exercise with a USB keyer.� Heck by adding the
ability to activate the frequency scan of most modern transceivers to
mix I can scan up and
I joined the group yesterday so by way of introduction here is my
background
I was first licensed in 1961. I remember my first contact on 160M
vividly, homebrew 6AQ5/807 running about 50 watts and a BC348...I still
have the receiver but not the home brew transmitter. I had attached
about
Dave
If read your post correctly you are saying that you are working against
an ambient noise level of 20-30 db over S9 is that correct.?
And for starters your measurements are made against that background did
I understand that correctly?
Trying to keep this simple
Dave
NR1DX
On
Taking the 160M FT8 rant further ( nothing better to do)
As I was out clearing a path through the jungle this morning in
preparation for the 2 wire beverage it occurred to me that what we
REALLY NEED is a "WAR Award" Worked All Robots !
Then following this thread further and
I understand many of you are frustrated by the FT8 camel with his nose
in the tent. Things change
Now FT8 showed up while I was on sabbatical for 10+ years from the hobby
so I am now just getting into it.
On the negative side I agree
1) It has caused a loss of contacts on CW
2) It is a lot
Chuck et all
It is well documented that the the NEC-2 based programs leave something
to be desired� with wires on or very near the ground, This includes most
of the EZENEC� family and MMANA-G� Purportedly NEC-4 ( there is a Ezenec
version which runs with NEC 4 engine ... not a cheap date)
Sig
One of the few things I miss about living in New England (don't miss it
enough to own a snow shovel again), Is the 160/80 path to EU
My theory is LA/SM/OH and OJ0 all have a really "long" gray line. right now.
What time did you work OJ0O ?� I just finished my "prototype" N/S R-BOG
/24/2019 7:53 PM, Artek Manuals wrote:
Chuck et all
It is well documented that the the NEC-2 based programs leave
something to be desired� with wires on or very near the ground, This
includes most of the EZENEC� family and MMANA-G� Purportedly NEC-4 (
there is a Ezenec version which runs with NE
!!. At
the new QTH the best tree supports resulted in a 6db pattern decrease
directly pointed a Europe 8^(... Which is why I ended up with a "T"
instead of an "L".)
Dave
NR1DX
On 8/25/2019 8:25 AM, Artek Manuals wrote:
Jerry et all
My personal antenna FOR 1
Lloyd et all
Isn't a BOG say 3" or 6" high draped over the weeds really now a very
low beverage and not a BOG at all?
It now needs to be longer and terminated to ground on the far end like
you would a beverage in order to be effective?
Wish the NEC4 engine wasn't so expensive I am getting
ALL
Pursuant to the discussion a few weeks ago about robot contacts ( and
to some degree robot digi contacts since that mode is most conducive) .
As of the July board meeting the ARRL has officially disallowed robot
contacts ( in any mode) for contest and DXCC credit. It was not
mentioned
I am in the process of experimenting with an RBOG .. I have seen in
several places that BOGS are "self-terminating" and as such have an
optimum length (on 160M) of something on the order of 200-250 feet.
Longer BOGs supposedly have degraded directional properties for lengths
shorter and
Pete
Interesting idea to be sure...Regardless of the "theoretical" answer. I
would suggest you take daily readings (probably between 11AM and 1PM)
for a month and log those before starting to add radials. If day in and
day out you get variation of more than a few tenth's of a db the W3LPL
PaT
What Mike says is only partially true about receiving antennas .
Ideal yes . but not necessary...especially for a casual family
vacation DXepedition and I think Mike might have missed the part where
you said in DECEMBER, a quieter winter month . I worked well over 100
countries
So what is the recommended 2 wires conductor/cable for a 2 wire
reversible BOG? More specifically what can I get at the big-Box home
supply? I have heard of folks trying twisted pair doorbell wire, I have
heard of folks getting old military field wire at the surplus places. i
really don't have
a wrote:
Dave,
The run to the feedpoint of the beverage is about 600' The beverage
antenna itself will be coax and that will be about 800'.
Kevin, N9JKP
On Thursday 19 September 2019, 10:25:04 CDT, Artek Manuals
wrote:
Kevin
How long a run we talking here?
Dave
NR1DX
On 9/19/2019 1
Kevin
How long a run we talking here?
Dave
NR1DX
On 9/19/2019 11:17 AM, Kevin Shea via Topband wrote:
I have read that the skin effect at 2 MHz may be deeper than the copper coating
on a copper covered steel inner conductor of most RG6 cables.� Thus, as I plan
for long cable runs back from
John
touche !...for clarification, 65' high ( at top), Supported by 70' tall
hickory trees. Radials are 90' long (5' off the ground) 8^). lot is
200x270 ( just shy of 1.25 acres)
With non resonant, elevated radials, Common mode currents are a big
deal. And the choke ended up with 4 turns
Here in the deep south we generally don't get the kind of 160M openings
to EU that you enjoy up north, the price we pay for not freezing to
death when the lights go out and being able to work on our antennas year
round, I lived in NH and MN� for 15 years before moving back to FL so I
know
Tony
I have used one of these they do work . I had an opportunity to compare
it with a more typical end fed bog of the same length in the same
direction. They are identical in performance . In my situation both
BOG's were installed over very poor ( essentially well drained dry sand).
Pro's
You sit around in the pub for long thinking these UP?
I just built a LOG myself ( Loop on Ground) ... I also modeled a SLOG (
square loop on ground) but decided that it wasn't very good
Dave
NR1DX
On 12/3/2019 5:56 PM, Mike Smith VE9AA wrote:
polliwog
piece of long limp inductive wire on
You mean it will never be a BAG (Beverage Above Ground)?
Dave
NR1DX
On 12/3/2019 6:49 PM, K4SAV wrote:
You won't have any success trying to rename a BOG. A BOG (Beverage On
the Ground) is an accurate and appropriate name. Harold's first
"Beverage" was actually a BOG. A short time later it
2nd mike's point about the elevated radials if you have the room, and I
underscore his point about not connecting the above gnd radials to earth
ground and the need for a beefy common mode choke
Dave
NR1DX
On 12/15/2019 9:22 PM, Mike Waters wrote:
Do the inverted-L, but use at least two
one
On Oct 17, 2019, at 9:31 PM, Artek Manuals wrote:
Tim
Which antenna will you be using ; BOG, Beverage or a FLAG/Pennant
I have been doing some experimenting with the BF-4X with BOGs and Beverages in
both very poor sandy soil and then again at a water front (salt) canal
location. Eventu
Tim
Which antenna will you be using ; BOG, Beverage or a FLAG/Pennant
I have been doing some experimenting with the BF-4X with BOGs and
Beverages in both very poor sandy soil and then again at a water front
(salt) canal location. Eventually I will get around to trying out a
FLAG/Pennant
And NEITHER of those have thing to do with a RF Ground at a specific
frequency
Dave
NR1DX
On 10/18/2019 11:36 AM, Roger D Johnson wrote:
I wish there some sort of inoculation that hams could get that would
allow
them to discern the difference between a power line safety ground
my iPhone
On Oct 18, 2019, at 7:53 AM, Artek Manuals wrote:
Jim
Poor front to back can indeed be a result of being too long. Although w8JI
would argue that at 700 feet your just about at optimum (1.5 wavelengths) I
would think it would be easy to add an insulator /jumper and a set
Speaking of 3D2AG
Does anyone know why Tony does not show any CW contacts ( 160 or
otherwise) in his Online ( club-log) Log? The FT8 & FT4 confirmations
are there but no CW. I have asked him a couple of times about it and he
ignores the question ...odd
Grumpy Dave
NR1DX
--
Dave
Thats great .NOT even an ESP hint here in the south east... I
listened from 07:30Z to 12:00Z ...my reward was I did finally get to
work 3D2AG who I have been "stalking" for months, so the band conditions
were OK in that direction ...I guess the morning was not a total loss
Grumpy Dave
(
Could be coming from the power supply? Sometimes simple clip on chokes
are not enough either. I have a similar problem here on 20M I have dual
(Identical) monitors . One has an irritating but not debilitating spur
on 20 the other doesn't ..If I swap the monitors the spur follows the
monitor.
Nothing here in Florida ...not even a hint. Nothing else heard from the
Pacific in general could be condx
�What are they using for an antenna?
Dave
NR1DX
On 11/25/2019 2:13 AM, Gary Smith wrote:
Hi John,
Listening with 3 different Rx antennas in
CT & no cigar at this QTH.
Not the first
Dave et all
Friday night was better to be sure than Saturday night. Here in the
deep south we got no sunset or sunrise bump. In fact early in the
evening there were almost no EU to be heard, a few Caribs which were
quickly worked through. I gave up around 0200 and set an alarm for 0500.
Apologies in advance for off topic post
If there is anyone on the list in the DFW area that is DRIVING to
FLORIDA between now and the end of the year? I have an 80 lb amplifier
( Alpha 9500) that needs a ride. Would obviously much rather it make the
trip in someone's trunk than pay the
Ned
I was with right up until the last statement. What exactly is "ohmic
isolation" ? I never heard that term before ..could you expand on that
Dave
NR1DX
On 11/23/2019 3:21 PM, Ned Mountain wrote:
- Unified Microsystems has put a lot of effort into improving the
quality and water
As I suspected . thy "digging implement" tis naught but a spade
. !
Dave
NR1DX
On 11/23/2019 11:42 PM, Jim Brown wrote:
On 11/23/2019 8:04 PM, GEORGE WALLNER wrote:
I think the question was meant as a joke, as it is called "galvanic
isolation".
Almost 20 years ago, an
I went to bed the 2nd time last night around 0900Z (not much to show for
my 0700-0900 2 glass of water alarm. I decided to leave the computer and
rig on 1840 listening to dreaded drone of the FT8 bees. I slept in and
didn't get up till 1300Z an hour after my sunrise, Scanning the JTDX
record
Shelby
Not all their computers logs as of the online time stamp get fed into
the online database. Sometimes it takes another 12 to 24 hours for a
particular stations logs (As I recall there are at least 3 stations on
the air at all-times) to get uploaded. The reported time stamp is a bit
Mark, Bill et all
If you Google "Furnace Fan RFI" you will find a host of information on
how to cure rfi from variable speed AC ( & HEATING) blower fans. Turns
out that the fans in fact meet the FCC specs but at the level we operate
at they can wipe out the 500hz segments every 18-25khz. The
Fred
1) You will be (pleasantly) surprised at how well a 300' beverage
actually works on 160 ( and will work great on 80 & 40)
2) At 200' BOGs actually do well. I just finished a series of
experiments with some BOGs and have worked several new ones that we
could not copy on the Xmit
I have been experimenting a lot with BOGs in the last couple of months.
And now thanks to a very amiable neighbor will be moving into building
some more traditional elevated Beverages in the 450 to 500 foot range
My bogs and the beverages are /will be constructed using RG6 as the
antenna
Hi Tree
Thanks for the reminder actually I had better VK/ZK openings this
summer on the EAST coast than I have for the last month 8^). Europe and
Africa are definitely better though 8^)
Does N1MM do the distance/score calculation for the SP? Must since the
exchange is the grid square I
Neither
What is killing amateur radio is that for most young people it is not
relevant. When you can chat face to face anywhere in the world with a PC
and cell phone they ( understandably) don't see the attraction or
experience the thrill of hanging up a wire and waiting for
sunset/sunrise
for
everyone.
Tree
On Sun, Oct 13, 2019 at 10:56 AM Artek Manuals
mailto:manu...@artekmanuals.com>> wrote:
Hi Tree
Thanks for the reminder actually I had better VK/ZK openings this
summer on the EAST coast than I have for the last month 8^).
Europe and
Frank
I agree with you if the elevated radials are "resonant" .� However my
experience is the direct opposite with non resonant radials� for my
elevated system. Mine are 90' long for 160M. So far this year I have
worked 118 countries (102 confirmed) since getting back on the air�
starting in
Since the relevant portion of the original post was not quoted not sure
what the original problem was but
If your looking for an "easy" and reliable solution for a bi-directional
beverage in a single run so to speak, look at a copy of "The Beverage
Antenna Handbook" by Misek. He shows a
Steve et all
I think both characteristics of receiving antennas are important
depending on your location and the types of noise you are looking to
"minimize"
For those of you (and I at one time) who have the good fortune to be
located in relative quiet rural / remote environments like the
Dick
There are many sources that can generate this kind of "noise" . More
common of recent are variable speed blower motors in modern furnaces and
central A/C units. Next are cheap switch mode power supplies from a
plethora of items, manufactured in PRC. And finally outdoor lights that
come
Steve
I am curious, what antenna modeling program are you using that gives
direct readout in RDF? Or are you "estimating" it from the antenna
graphical pattern?
Dave
NR1DX
The recent experiments with my Beverages in the cold weather has raised some
comments about the termination resistor
readout of the RDF
value.
Don (wd8dsb)
On Fri, Jan 24, 2020 at 9:21 AM Artek Manuals
mailto:manu...@artekmanuals.com>> wrote:
Steve
I am curious, what antenna modeling program are you using that gives
direct readout in RDF? Or are you� "estimating"� it from the antenna
graphica
NR1DX:
Equipment: 1400W + 60' (20M) high "T" with 3 elevated radials + Bevs & BOGs
Location: Near Tampa Florida
Here in Florida, except for Africa and the Carib, we typically do not
enjoy the same good condx to EU that you fellows up north get the price
we pay for not having to use our
Larry
You could always use two 10KV 1000pf in series might be easier to find
Dave
NR1DX
manu...@artekmanuals.com
On 1/8/2020 11:35 PM, Larry via Topband wrote:
does anyone know of a HV (20KV) capacitor with a value of approximately 500 pf
that has a NPO value?
thanks in advance.
larry/n7dd
Roger
Apples and oranges
Your antenna is not a dipole but rather an Inverted V . Inverted V's
have a significant "vertical" radiation component compared to a dipole
I am not sure how you can compare your performance to the W4RNL
installation given your 750 miles north of there? Please
Richard
Glad to hear you are having good results with your FCP.
What is the basis for your estimate of a 4-6 db improvement? Which prior
antenna configuration was your improvement based on (or i.e. which was
the 2nd runner-up)
Dave
On 1/20/2020 7:59 AM, Richard McLachlan wrote:
After
On 160M the " skin depth" of ground goes beyond the grass ...so it
depends on more than just your yard but also the type of soil
underneath, how often it is watered , fertilized etc etc.
What are you trying to do that you need to know?
Dave
NR1DX
On 3/23/2020 6:01 PM, Chortek, Robert L.
Ahhh ...but what about vertical antennas with elevated radials ?
On 3/24/2020 1:04 AM, Jim Brown wrote:
On 3/23/2020 9:05 PM, donov...@starpower.net wrote:
Excellent skin depth reference here:
www.antennasbyn6lf.com/files/ground_skin_depth_and_wavelength.pdf
Rudy is a great reference
Mike
I have taken the liberty of changing to subject line to more accurately
reflect the content of your reply on the Waller Flag thread
After much reading and a lot of personal experience and experimentation
I am of the opinion that BOG front-to-back is a function not only the
length but
Roger
I am curious, why Wednesday night ( when many have to get up and go to
work the next morning?) instead of Friday or Saturday?
Was on.. on and off� the only station on CW early in the evening was
OX/OZ1AHJ.. and then a "G"� a bit later but was who ever it was in
and out of the QSB
DELETE, DELETE DELETE
AT LEAST CHANGE TO SUBJECT LINE ON THE THREAD IF YOU GUYS ARE GOING TO
TURN THIS INTO A FT8 BASHING SESSION , WHICH AS I RECALL THE
MODERATOR/LIST OWNER BANNED LAST YEAR
TALK ABOUT A WASTE OF BANDWIDTH
DAVE
On 10/9/2020 1:02 PM, Jim Brown wrote:
On 10/9/2020 7:54 AM,
Ron et all
Same here not the first DX station at our ( FL ) Sunrise. I called a
couple of times and did not even show up in VK/ZL on PSK Reporter which
I usually do at sunrise. I then slid up to 80 and there were JA's a VK's
and then I got called by a YC8 for a new on one 80 . Guess the LUF
I think the spacing is a bit wide try something more on the order of
250-270' ( goes through the middle of the house right 8^)
Dave
NR1DX
On 10/18/2020 11:20 AM, Kenny Silverman wrote:
My new house has 6 wooded acres in roughly a square. For EU, I was hoping to
get a pair of phased 500’
Rick
I have had Spectrum in the past but dont� a tthe moment , never had a
problem...BUT a lot of vatables can play inot this
This can be a function of grounds ( at the radio and at the Spectrum
distribution box). I t can also be an unlucky choice of cable lengths
which turned out to be
Mark
Tell us more about the transformer? My own experience is that core
material and impedance matching at the frequency of interest often pays off.
I have a 200' BOG (N-S) and a 460ft� x 6ft Beverage (E-W) . Both
antennas work very well for what they are comparing them to what I hear
on
Ed
What receiver do you have now? You may not need a preamp at all?
Have you tried the BOG without a preamp yet?
Dave
On 12/3/2020 4:42 AM, Edward via Topband wrote:
Sorry. Meant RPA 1 or 2.
On 3 Dec 2020, at 12:38 PM, Edward wrote:
Any good? If not this one, which preamp would you
Ron
Count me in , I agree no same country contacts, PERIOD
AND you wouldn't loose any zones ..zones 3, 4 and 5 are covered in
Canada as well!
Dave
NR1DX
On 12/1/2020 12:27 PM, Ron Spencer via Topband wrote:
Here too in central NC conditions were, at best, poor. Bad prop and
lots of
Wes
You got that right,you gotta walk a mile in the other guys shoes!!
When I lived in New Hampshire working EU on 160 was a walk in the park
compared to the kind of propagation we get down here in FL
or what the guys out west have to EU ( I did a stint as N7EX for a while
in Spokane) ...
Conditions certainly didn't favor 160 over the weekend CQWW contest here
in Florida at least.
Looking back in 2019 I worked 50 countries on 160 during CQWW, this year
it was only 17, only 3 Europeans and those were very weak. I'm sure the
lack of expeditions due to CV-19 played a part but on
Especially if you have elevated radials you will need a choke otherwise
the coax and your shack will become part of the ground plane. . In my
case I have a choke ( for common mode currents) and UNUN to match the 25
ohm impedance of the antenna to 50 ohms. In some installations the
common
OR
The propagation mode on 160 is not what we have popularly come to "Accept".
There is a growing body of evidence that particularly at gray line that
signals often arrive at a higher angles. This is often attributed to
"ducting" . Maybe a lot more of 160 intercontinental propagation is due
Here in Florida in the evenings we get a fairly consistent opening to
Europe it begins about 1 hour BEFORE local Sunset (2215Z) , Peaks about
1/2 hour before Sunset and then all but dies out on most nights by 15min
after official sunset. Later around 0200Z things slowly build back up
till
Jim et all
I agree with what you say on all points when it comes to radials on the
ground and salt water affects.
However I have always wondered about elevated radials . The NEC ( both 2
and 4) models (not that those are to always be trusted) show very little
(if any) improvement beyond
Tom
I'm using a 470 foot E/W Beverage here in Florida on receive and a 60'
high "T" with four 90' elevated radials for transmit (TS890/KPA1500) .
The CW operation the first night was quite a QSB roller coaster and I
had no success catching the right xmit frequency with the peaks. The
about scientific concepts that have
long been well understood.
73, Jim K9YC
On 11/6/2020 12:58 PM, Artek Manuals wrote:
Jim
Show me the ACTUAL antenna range pattern measurement data with and
without the common mode choke on a a similar antenna, with a
reasonable SWR ( LESS THAN 1.5:1
Bill
Last night ON 160 I worked 32 European and SA stations with the reported
SFI of 88. earlier in the week with a similar SFI number I heard
nothing from EU on 160. Conclusion : At these levels SFI is not the factor
Conditions on 15 and 12 have been for the last week or so been great .
Among other things they will and can arc if very close or even
intermittently touching. if they are not bonded the currents and
voltages on each wire may be different enough to arc then you get
interesting things going on especially at high power,. I had a related
experience where I had radial
Bill
Arcing is probably not an issue at least for the 1st couple of years. I
guess at some point 10 years down the road and your bargain wire is
likely not UV resistant rated (?) Over time it will weather and crack .,
running 1.5KW on FT8 you run the risk of setting the grass or leaf
litter
Kenny
My personal experience with radials on the ground is that with a fair
number (16 or more) that I end up with little if any common mode
currents on the coax . Smaller (numbers of)� ground mounted radial
counts could benefit somewhat from a choke, depends on other factors�
besides the
Jim/ K9YC
I am with you 100% on your comments below
my 80/ 160 verticals all run "10 lbs of ferrite" at the feed points but
that is because I run elevated non resonant radials these days. 5lbs of
ferrites just got to warm to touch, but that is fodder for a whole
different thread.� My
Compared to last year...they are
Dave
NR1DX
On 1/5/2021 5:25 AM, Jim Brown wrote:
With all the posts here in the last few days one might draw the
conclusion that band conditions are really terrible!
73, Jim K9YC
_
Searchable Archives: http://www.contesting.com/_topband -
Comment below
On 1/17/2021 11:09 AM, Wes wrote:
I'm not going to smack this tar baby, other than to note that Elecraft
is a special case with respect to S-meters. K3(S) have an "Absolute"
mode that compensates for preamp gain or input attenuation. So the
S-meter becomes a decent power
Ron et all
Ditto
Dave
NR1DX
On 1/18/2021 7:29 AM, Ron Spencer via Topband wrote:
For the low bands, I typically listen on my receive antennas. S meter readings
on them are proportional to the signal strength but not an accurate account.
I'd estimate it might be 4 or 5 S units down from the
Roger
Lucky you!
My S meter rarely goes below S4( on the BOG) and S8 on the transmit
antenna ..
In the context of measuring one way propagation there is the purist's
dilemma of receiving antenna signal level vs transmit antenna signal level ?
Dave
NR1DX
On 1/17/2021 8:04 AM, Roger
True indeed Charlie
It was such an observation by accident that clued me into the fact that
I needed a choke on a system with elevated radials the first time :)
Dave
NR1DX
On 1/1/2021 2:10 PM, n0...@juno.com wrote:
To offer another view.IMHO
Measure the impedance at the base of the
Mike & Bill
Thank you!!! I sometimes think there is too much emphasis on NEC
modelling and never enough real world verification with actual field
measurements
{I have hijacked the original thread and changed the subject. to be more
on point }
N6FL was quoted earlier in the previous
atts. Broke a number
of DX pileups, to my utter amazement.
*Having said that, I had nothing else to compare it to in an A/B test!
73, Mike
W0BTU
On Fri, Jan 1, 2021, 3:37 PM Artek Manuals wrote:
Correction that should be N6LF (not N6FL)
NR1DX
On 1/1/2021 4:26 PM, Artek Manuals wrote:
N6F
Correction that should be N6LF (not N6FL)
NR1DX
On 1/1/2021 4:26 PM, Artek Manuals wrote:
Mike & Bill
Thank you!!! I sometimes think there is too much emphasis on NEC
modelling and never enough real world verification with actual field
measurements
{I have hijacked the original th
Not a simple , on size fits all answer
What happens depends on the frequency you are talking about ( I
assume 1.825 but if it is a multi band vertical ..then???) and how much
above the ground plane you are talking about
And the approximate foot print of your radial systems ( square lot
Here in the south ( Florida) much the same propagation.. A few really
strong stations from EU ( one UA2F that was so strong as to be
suspicious) . The best EU signals were nearer their sunrise. Earlier in
the evening not so much, a handful of week EU stations with deep QSB
were the norm
Technically the insulation should electrically lengthen the antenna
about 1.5-2 % (lower the frequency)
As Wes said the dimensions would be helpful. is the flat op horizontal
or does it slope down if it slopes how low is the far end?
I dont think 17 turns of RG400 is doing much for you on
Rich
Roughly how big is your back yard? Any trees over 30' high?
( I did work Antarctica from Texas once with a Bnut HF-9V and about 8
radials, so even a blind pig finds a truffle now and then ...but your
instincts are correct about there being better alternatives ...8^)
Dave
NR1DX
On
Rick et all
I have changed the Subject line rather than further hijack Tree's
original thread
I have a "T" Radiator 60' high with flat top of the T, 80' long. Next 4
elevated non resonant 90' radials at 6ft.This gets me to ~22.5 ohms,
2.25:1 matching transformer out of Sevick to go to
My go to guy for Silver-Teflon PL-259 and� Amphenol. Good selection of
Solder and Crimp ON ...Also sells those hard to find heavy duty crimp tools
https://www.ebay.com/str/n5iawrfcommunications
Cant recommend him enough
Dave
NR1DX
On 4/8/2021 3:22 PM, Raymond Benny wrote:
I'm in the process
Is that "SOLID" copper center conductor or the Copper plated aluminum as
is the case with LMR400 these days...8^(
Dave
NR1DX
On 4/8/2021 5:43 PM, Jim Brown wrote:
On 4/8/2021 2:18 PM, Jim Garland wrote:
On a related topic, I’ve stopped using LMR400 and LMR400UF coax
completely for HF work,
in all I spent about 5 hours mostly from 04:30Z to 07:00Z both nights
Signals were generally good . Unusual "spotlight" propagation Friday
Night/Saturday morn. Worked a half dozen S5xxx stations ALL with
unusually loud signals. More than one over S-9 on the BOG. While ALL
other EU's were down
Roger
I am not exactly sure which BETA RBN sight you are referring to. Could
you post a link?
Generally speaking here in the deep south of NA I can clearly see the
affects of the up swing in the sunspot cycle. The prior two years on
most evenings I could copy some EU at my sunset. The
The first question to ask is what is the operating goal for 160.
1) Local net or rag chew with his buddies.? In that case use the
existing vertical assuming the AATU can match it is enough . Might have
to a add lump loading coil at base to get it the point AATU can deal
with it . Generally
Andy
I did a lot of experiments about two years ago with LOGs and BOGs.
Generally I found the BOG to be better and a smaller investment in
"wire". I did a lot of experiments with feeding the LOGs in different
locations (sides, corners, etc) and the results we never very
outstanding. Now I
Comments below
On 1/7/2022 6:23 AM, Roger Kennedy wrote:
But I picked up on people saying that EZNEC doesn't model these antennas
near the ground very well.
This is very true of EZENEC based on NEC -2EZENEC PRO 4 based on
NEC-4 depending on attention to detail and uniformity of soil
Pete
I was just having this very discussion with some one else this week.
We modeled a 100 ' tall T on 160 M with sixty-four 100' long radials
using NEC-4. with that many radials there was essentially no discernible
difference between #22 wire radials and #14 radials on average earth
I am with Pete on you "no quoted context" guys . I have given up and
simply delete those messages without reading as well ( your loss not mine)
Ahhh and then are the "well meaning thread hijackers" . In my vision of
the "next life" both groups will be doomed to trying to work Bouvet and
P5
Pete.
The recent modeling I did in evaluating the effects of soil type for the
Folded Counter Poise as a ground plane was a real eye opener as to how
much soil conductivity affects the performance of any given antenna.
QUESTIONS:
1) What Kind of soil are you working with (conductivity,
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