.. For many of us, about the best we can do is try to
clean up the environment we can control.
73, Pete N4ZR
On 4/4/2024 1:07 AM, Michael Tope wrote:
That sure seems to be the case, Bob. Heck even on 40 meters I have
found myself calling loud Chinese stations in vein. My dipole at 45ft
just
No, they are not, but there's no reason I know of that would prevent RBN
spots from being carried on any other network - they are distributed to
the "wholesale market" (not end users please) on Telnet.
73, Pete N4ZR
On 1/26/2024 6:06 PM, Don Kirk wrote:
Hi Mike,
As far as
local 500-watt radio station on 1500+ KHz went to low power at
6 pm, so my MFJ analyzer didn't freak out from the received signal.
73, Pete N4ZR
On 12/21/2023 4:55 PM, Jim Brown wrote:
On 12/21/2023 12:54 PM, Paul Dulaff via Topband wrote:
Ran a basic EZNEC model with no tower present for
If you can get that close I suggest a small explosive charge
73, Pete N4ZR
On 12/17/2023 10:31 AM, John Kaufmann via Topband wrote:
If you are going to use the NCC-2 to null a nearby in-band transmitter, I think
it's very likely that the NCC-2 will get overloaded by the extremely stro
reamps a good alternative?
--
73, Pete N4ZR
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
No, just an error of understanding on my part. I did a lookup for the
last 36 hours, but the map only plots the last 100 spots, something that
I should have realized but hadn't. Apologies to everyone.
73, Pete N4ZR
On 1/28/2023 8:59 AM, Tim Shoppa wrote:
Context, Pete? Maybe you had
This snapshot of RBN spots over the last 36 hours is a little disappointing.
Is there really an international contest on?
--
73, Pete N4ZR
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
parallel to the ground. Has anyone experimented with this? What about
the usual shape, but higher off the ground? I have 4X30' radials plus a
ground rod, with the radials laid under and in line with the elements
--
73, Pete N4ZR
_
Searchable Archives: http://www.contesti
This is really cool. Somehow I had managed to miss the emergence of the
Kiwi WEBSDR network. Clearly, that *is* a better way
73, Pete N4ZR
On 1/18/2023 4:52 PM, VE6WZ_Steve wrote:
Further to Don and Steve’s comment about using an on-line KIWI WEBSDR to check
your signal, I just uploaded a
I agree entirely - the challenge is to model a tower and two multiband
yagis with sufficient fidelity.
73, Pete N4ZR
On 1/18/2023 2:19 PM, James Wolf wrote:
It's quite possible that the addition of a beam at 60 ft. could cause capacity
hat effect changing the current flow in the tower
mpare receiving
antennas, without QSYing, but you must wait 10 minutes before the system
will accept a second spot of the same station from you.
73, Pete N4ZR
On 1/18/2023 11:31 AM, Stan Stockton wrote:
Ignacy,
Is your thought that you are a few dB weaker based on sone kind of A-B test of
th
Darrell, I suspect you would find better response on r...@contesting.com,
where all the mavens hang out.
73, Pete N4ZR
On 12/29/2022 9:20 PM, AB2E Darrell wrote:
I trip a GFI breaker sometimes on 160m, usually in a contest 1500W.
Never had a problem when GFI outlets were the norm, but I had
n
is S6-7 in the right direction and S3 in the reverse. and S9 +10 on the
inverted L. There's also something haywire in the K9AY's preamp, which
*reduces* signal by a couple of S-Units. Could be I need to replace the
transistor?
--
73, Pete N4ZR
One of the RBN team
_
From 13 years experience rather than detailed analysis or any knowledge
of VE3NEA's decoding methods, I don't think that an additional
half-space is a big problem - certainly not as compared to running
things together - for example making TEST N4ZR into TESTN4ZR. The
latter makes fo
73, Pete N4ZR,one of the RBN team
Check out our web server at
<https://reversebeacon.net/main.php>.
For spots, please use your favorite
"retail" DX cluster.
Earlier today, someone who shall remain nameless accused me of claiming
sole credit for the RBN, based on my long
tions,
so it would be glaringly obvious when spots for K3LPL and W3LPL showed
up on the same frequency. I didn't see it happen.
73, Pete N4ZR,for the N1MM Team
Check out our web server at
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For spots, please use your favorite
"retail"
Just cut 20 more 70' radials. Time to go play in the yard.
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at<https://reversebeacon.net>.
For spots, please use your favorite
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On 11/12/2022 11:41 AM, Grant Saviers wrote:
The 34
Now that the lawn mowing is done for the season, I resuscitated my 160M
inverted L. With 13 on the ground radials, each roughly 70 feet long,
measured R of 34 ohms seems OK to me. Is it worth laying down more
radials, or am I approaching diminishing returns?
--
73, Pete N4ZR
Check out the
Funny (I guess) - we have Chinese manufacturers cloning a Russian design.
73, Pete N4ZR
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On 10/9/2022 12:35 PM, K4SAV wrote:
This link show
That's amazing - there are at least 10 different listings on Amazon,
ranging from $54 to $70. They all appear to be the same box,.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
"retail"
willing to give it a try. Is there someplace
online where I can check for recent activity by country?
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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I have to demur. Government-to-government sanctions are one thing, but
ultimately it will come down to the Russian people turning against
Putin, and it's hard for me to understand why they shouldn't feel the
cost of his transgressions in this as in other areas.
73, Pete N4ZR
Check o
Yup. Me too.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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On 2/24/2022 8:03 AM, MU 4CX250B wrote:
Good move, Mark. We all know the current assault on Ukraine is
Amen, Mel. My favorites (ha) are the people who don't include *any*
context in their replies.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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On 2/1/2022 2:05
mited to nil, signal strengths are rarely better than my inverted-L,
and the adjusting the termination seems to make very little difference.
Any hints?
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favor
Hi Roger - unfortunately, we have no way of telling, because too many
factors influence SNR at each individual node. If you noted that the
same RBN nodes were giving lower SNR reports than they had on previous
occasions, then I'd guess propagation must have been poor.
73, Pete N4ZR
Chec
pattern file lets CW Skimmer "anticipate"
common callsign patterns and require fewer repetitions for common patterns.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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rplus, silver-plated (!) 18-gauge insulated copper wire.
Currently using 16, +/- 1/8 wave on-the-ground radials made with the
stuff. Feedpoint resistance seems to be by the book, at least as
compared to feeding the antenna against a single ground rod.
--
73, Pete N4ZR
Check out the new Re
http://beta.reversebeacon.net/main.php
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at<http://beta.reversebeacon.net>.
For spots, please use your favorite
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On 1/4/2022 1:58 PM, Artek Manuals wrote:
Roger
I am not exactly sure which BE
No significant difference in most cases.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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On 1/3/2022 10:55 AM, W0MU Mike Fatchett wrote:
Which antenna can you more
Thanks, Cecil. I may have to look into one of those multi-element
solutions.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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On 1/2/2022 11:01 AM, Cecil acuff wro
", but the K9AY loop seems a little bit underwhelming.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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_
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Here's an interesting source -
https://balloonmarket.co.uk/lift-ability. Looks like one of the last
couple in the table should be big enough - say 5 feet in diameter for
starters.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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FWIW, the only thing that would concern me about that sort of solution
is the projectile, and its potential for damage if it should hit someone
(or something). I personally prefer the tennis-ball cannon
(antennalauncher.com) for that reason.
73, Pete N4ZR
Check out the new Reverse Beacon
de of 304 stainless with a nylon sheave which has a
very large and deep groove. It's hard to imagine a scenario where the
rope will hop out of this sheave.
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use you
Thanks everyone who replied - I think I have a handle on it now
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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On 9/25/2021 9:32 AM, Pete Smith N4ZR wrote:
I
over the pulley caused it to break, so
this time around I'd like to use a rope through the pulley and an
insulator at the corner. Question is how best to do it, to minimize
strain on the antenna wire, making it more durable.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web
magnetic loops.
I can't find it now - can anyone help?
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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_
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- at the SO-239 where the feedline
comes into the box (before the chokes) , or at the end of the second
choke that connects to the inverted L, or ???
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favor
more what I'd expect. Curves are way too flat, but ...
That's the end of it for this year - I promise. Just didn't want to
leave it dangling.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use
me I'll
rewind the choke on a #31 core and try again next fall.
Thanks everyone for trying - I learned some things I didn't know before,
anyway.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use yo
Jim, ignorant question - at X=0, isn't the resistive component also the
impedance?
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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On 3/25/2021 3:08 PM, Jim Brown
o me.
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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On 3/25/2021 12:26 PM, Artek Manuals wrote:
Technically the insulation should electrically lengthen the antenna
I saw
the 1977 KHz resonance (X crossing zero). SWR at minimum was above
2:1. Does this make sense? I know the radial field is inadequate for
good performance, but...
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, plea
) a type 43 core
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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_
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Thanks, all.
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use your favorite
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On 1/24/2021 10:52 AM, Tim Shoppa wrote:
Pete, I live in a residential neighborhood (not the most dense by
to Europe
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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_
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Thank you to everyone who replied to my queries - very useful! I think
I have what I need, except for a way to keep my hands warm while working
on it!
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
web server at <http://beta.reversebeacon.net>.
For spots, please use your fa
dials on the ground under the loops. I read
that suggested somewhere, but don't know if it's a good or bad idea.
--
73, Pete N4ZR
Check out the new Reverse Beacon Network
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For spots, please use your favorite
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Andy, I had two Yeasu rotators on my shunt-fed tower, one at 62 feet and
one at 97 feet, for about 15 years and never had trouble, although I was
just running 100 watts on 160
73, Pete N4ZR
Check out the Reverse Beacon Network
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spotting RTTY activity wor
I keep seeing references to people using symmetrical wire top loading
instead of the single wire of an inverted L. My question is how to
calculate the appropriate length for the two top-loading wires.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>
As my grandmother used to say, "Patience is a virtue." He is very loud
tonight, was working EU, switched to working NA about half an hour ago
(0200Z)
73, Pete N4ZR
Check out the Reverse Beacon Network
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For s
I'm hearing them very well at 1823.5, listening up. The op signs his
call only every 15 minutes or so, and was working EU but switched to
working US around 9:00 EST. without announcement
73, Pete N4ZR
Check out the Reverse Beacon Network
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sp
t would be to use
something like No.12 or 14 wire, but the terminals on the relay are
roughly the diameter of #18 wire, and the center conductor of the common
mode choke (wound with RG-400) is similarly small, so would the heavy
wire be overkill?
--
73, Pete N4ZR
Check out the Reverse Beac
t the shield and compare, but my expectation is
that a single pole will do the trick.
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, please use your favorite
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On 12/10/2019 1:54
I can use?
73, Pete N4ZR
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For spots, please use your favorite
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quality of ground, I'd expect). I was amazed, playing with
the high end of the AM broadcast band, to be able to select one of two
stations on the same frequency, just by switching the direction of the
loop array. I can hardly wait for European sunrise.
73, Pete N4ZR
Check out the Reverse B
Thanks to everyone who responded. I'm going to begin by disconnecting
my transmit antenna at the feedpoint, as suggested by W3LPL and others,
to see if it is the presence of the transmitting antenna (an inverted L)
that is the problem. Lots of other things to try, too.
--
73, Pete
them
tilting upward approximately 15-20 degrees from the center in each
direction. I can make that happen with some more rigging, but before I
do that, I'm looking for suggestions of other places to look for the
problem.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
at <ht
That says it all - Wolf doesn't seem to be answering e-mails and I
figured someone probably has already gotten one.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, please use your favorite
"re
or this fall is Thursday.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, please use your favorite
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_
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KHz switched to night-time power (6 watts!) and stopped
scrambling my antenna analyzer.
73, Pete N4ZR
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For spots, please use your favorite
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On 10/15/2019
und rod if
necessary. True?
PS even without the ground, or the feedline chokes, directivity seems
pretty good on high AM BC stations.
Any advice much appreciated.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For s
ack.
73, Pete N4ZR
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For spots, please use your favorite
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On 10/10/2019 10:08 PM, Alan Swinger wrote:
I use a Model 197 RF Limiter/Arrestor by Industrial Co
h would be best (opening or shorting)? I only have
one spare transistor.
Advice much appreciated
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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Hank - any RBN node-op can make his output available at a local user
telnet port. That's a built-in feature of the RBN Aggregator, thanks to
W3OA.
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, plea
Rick, I misled you with the reference to low-angle radiation. I'm
broadly aware of how ground conductivity in the Fresnel zone works.
What I'm interested in doing is characterizing how much my signal
improves as I add radials - sort of like a distant field-strength meter.
73, Pete
and has a
very capable Skimmer Server-based RBN node.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, please use your favorite
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_
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Thanks to everyone who responded to my message - lots of good ideas. I
think my favorite was the one about tapping a shunt coil from both ends,
alternately, to bring both the radiation resistance and the resonant
frequency in line.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
at
through addition of radials. Question is,
would I profit most by adding another 4 50-60 foot radials, or 2 radials
each 100-120 feet?
Comments appreciated.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots
The other day a ham friend suggested using a coil ("hairpin") to match
the low impedance of a well-radialed inverted L to 50-ohm coax. This
struck me as a potentially-attractive alternative to a series vacuum
capacitor, but I don't know enough to evaluate it. Thoughts?
--
d
MFJ-259 results look promising. It's just a problem of waiting for lawn
mowing to stop hi.
--
73, Pete N4ZR
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Jumper was 1 foot.
73, Pete N4ZR
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On 8/21/2019 12:47 PM, WW3S wrote:
Where did you connect the analyzer? You wan
minimum radials
in the next few days, and would expect the R value to drop as I do so.
Am I off-base?
--
73, Pete N4ZR
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"retail&
.com/itm/Military-Telephone-Wire-Spool-P-N-WD1A-5Km-NSN-6145011554258-Looks-NOS-unused-/233296772991?_trksid=p2385738.m4383.l4275.c10>.
73, Pete N4ZR
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For spots, please use your favorite
&q
m putting up an
inverted L, trying to avoid having to lay down 6000 or even 750 feet of
on-the ground radials, and don't really have room for resonant elevated
radials on 160.
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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x27;ll see.
--
73, Pete N4ZR
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_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
eciate any current suggestions.
--
73, Pete N4ZR
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et of KD9SV's BOG hardware, nearly new, bought from
DXEngineering for $300 at the end of last year. I'm interested in
trading for K9AY or SAL equipment (I can build the loops myself).
Anyone want to swap? I'll include 220 feet of WD1-A wire, also newly
purchased and deployed.
oyed.
--
73, Pete N4ZR
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e line. Or
should I look at another type of receiving antenna, such as a K9AY loop
or SAL, which can be placed much farther from the power line?
--
73, Pete N4ZR
Check out the Reverse Beacon Network
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For spots, pleas
Mini-circuits also makes a passive splitter (ZFSC-2-4)that works fine
for this - though any passive device will cost you 3.5-4 dB
73, Pete N4ZR
Check out the Reverse Beacon Network
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&
like to finish my 160M DXCC this
winter if possible
--
73, Pete N4ZR
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I am contemplating 4 elevated radials for a 160-meter inverted L. Am I
correct to think that I need to resonate each pair of radials in their
final location as if they were a very low dipole?
--
73, Pete N4ZR
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sp
73, Pete N4ZR
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ld be well short of a quarter wave.
My other option is an inverted L. Should I maybe just go ahead with that?
--
73, Pete N4ZR
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"re
f the rocket
launcher (right under the tribander).
3. Attempt shunt feed of the rocket launcher for 160 and maybe 80.
Suggestions and comments welcome.
--
73, Pete N4ZR
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For spots,
nnas.
73, Pete N4ZR
Download the new N1MM Logger+ at
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For spots, please use your favorite
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On 1/16/2016 8:52 AM, Louis Parascon
polarization, according to his writeups, my thought was that perhaps
combining vertical and horizontal polarization might yield a net
improvement in SNR.
73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Network at
<http://reversebeacon.
AY, SAL or flag/pennant receiving
antennas, and did you see something similar?
Any other critiques of his design would be appreciated. The price is
certainly right, and the construction looks good. A couple of 1-meter
coplanar loops wouldn't be at all hard to construct.
--
73, Pete N4ZR
Down
that
CW Skimmer Server decides that it should spot a station, and normally
anomalous SNRs only result if another station is near zero-beat. but
with ADC clipping all bets are off.
73, Pete N4ZR
Download the new N1MM Logger+ at
<http://N1MM.hamdocs.com>. Check
out the Reverse Beacon Netw
ue to the switching system I have in place.
--
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
_
Topband Reflector Archives -
Sure is - Randall Mullinax, AD5RM.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 3/27/2015 11:12 PM, Art Snapper wrote:
The radio station engineer in
ncy as the real CQer.
With the current Skimmer architecture, there does not seem to be any way
around this, but the CT1BOH filters implemented in ARCluster V6 can help
a lot. See
<http://64.128.19.154/ArcDocsVer6/UserManual/ArcDx.htm#SetDxFilter> for
details.
73, Pete N4ZR
Check
I ran across a sketchy reference to this idea, described as a way to
block common mode signals from making it into the shack by cutting off
the paths from the coax shield to the RX input. Is there anything to
the idea?
--
73, Pete N4ZR
Check out the Reverse Beacon Network at
http
160 (97 feet with 3 yagis, 2 on top) and I could not find a 50-ohm
point.It was absurdly easy to adjust and seems to work quite well at 100
watts. I'm sure there are better solutions (including Herb's), but this
was really simple.
73, Pete N4ZR
Check out the Reverse Beacon Netwo
r
than CQ, and stay out of other people's way, nobody should be upset.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 8/18/2014 12:16 PM, Tom W8J
bove isn't enough information.
--
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
_
Topband Reflector Archives - http://www.contesting.com/_topband
has not borne out the claims of the inventors."
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 4/9/2014 9:28 PM, Michael St. Angelo wrote:
It&#x
fault.
73, Pete N4ZR
Check out the Reverse Beacon Network at
http://reversebeacon.net,
blog at reversebeacon.blogspot.com.
For spots, please go to your favorite
ARC V6 or VE7CC DX cluster node.
On 3/13/2014 11:07 PM, Joe Subich, W4TV wrote:
I use a couple of old CATV splitters for general pur
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