Perhaps common-mode isolation of currents induced in the antenna coax shield??
Charlie, K4OTV
Lee K7TJR wrote:
> Hmmm, I wonder why the Array Solutions circuit board picture shows MCL 1:1
> transformers.
>
> Sounds fishy to me. Even the waveform pictures show clipping at a 1:1 with
> o
Google W7IUV preamp and W7IUV Aplifier and you will get to it
Jim Brown wrote:
> On Fri,8/28/2015 9:53 AM, Mike Waters wrote:
> > Go tohttp://w7iuv.com/ and click on "W7IUV preamp" in the left column.
> > That is a link to a PDF file, presently
> > http://w7iuv.com/preamp60/preamp_r60.pdf
Some years ago, a few of us would occasionally have QSOs that we called
"Martin Luthers" -as in "I had a DREAM last night!" and we'd send off the QSLs
and would often get one back! This was especially true on 160. I still,
occasionally , have a "Martin Luther"! Straining right down into the no
73,
Charlie, K4OTV
-Original Message-
From: KL7RA [mailto:kl...@ptialaska.net]
Sent: Saturday, February 28, 2015 10:53 PM
To: Charlie Cunningham; 'Glenn Biggerstaff'; topband@contesting.com
Subject: Re: Topband: 160 Tower on 80
>Any thoughts or alternative ideas would be gre
Well, Glenn, I would lean toward voltage-feed at the base, since you have
that insulated tower! Because of the lower current, the ground-losses
would be minimized, and the current maximum would be fairly high on the
tower, resulting in a nice low-elevation angle, omni-directional radiator
for lo
Í would leave it alone, Mike! Your tuner or amplifier should be able to
tune out that small bit of reactance, I would think! And on 160 the excess
loss in the coax from a bit of VSWR is really negligible!
GL!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@
The joys of "Internet DXing"!! Everybody that comes on is swamped by
"packet-rats"!!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Kenneth Grimm
Sent: Thursday, February 19, 2015 10:37 AM
To: GALE STEWARD
Cc: topband@contesting.
Jon,
If you haven't already, check this app out! It was just great figuring out
time slots to try the various bands for the K1N expedition! It's a VERY
useful tool for DXers - especially low-band DXers! Sure beats the old
plastic "DX Edge" that we used in the old days. Very useful for looking
True, George1
Those were excellent times for 160, 80 and 40m and worked well for me!
There's a lot to be said for keeping an eye on the daylight map and "being
where the competition isn''t! My 160 antenna has been down for a few years,
but I had a very easy 160 QSO with K1N using the remnant of m
Well, do keep in mind, Rune, that it's summertime in Ecuador, and he has
summertime QRN, whereas it's wintertime in LA , so the band is quieter where
you are! J
73,
Charlie,K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Rune Øye
Se
Actually ,Jim, the velocity of propagation of radio waves (or light waves)
in free space is about 1 foot/nanosecond, NOT 1 foot per microsecond. It
would seem to me that one needs to have a measure of directivity as well a s
time, an the time factor might boil down to phase difference measurement
I surely don't think so! I don't expect that there is any way, unless ALL
amateur transmitters were equipped with an embedded address encoder and
supplied the owner/operator's call and the station GPS coordinates!!
My $0.02
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:top
Amen!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Doug
Renwick
Sent: Sunday, February 08, 2015 2:34 PM
To: topband@contesting.com
Subject: Re: Topband: K1N DQRM Tracking Project
A poster on the cluster said it the best:
DQRM tri
I haven't bothered with it, Doug. I see it mostly as an "exercise in
futility". The "cops" never ID, and the MOST TROUBLESOME QRM is from
"packet-rats" seeing the spots and then tuning up interminably on to he DX
QRG - of course they never ID either - and they are too lazy and
inconsiderate to mov
I agree, Gary. Over the years I've seem a number of DX stations do that -
especially on quiet bands or if they have more modest stations, or are in
really far-away places. It's never bothered me and I've always just viewed
as an invitation and an announcement that they are QRV. Of course, alerting
now" if they made a contact or not.
The question was if K1N had "lost" their QSO from the computer log. No matter
how sure you are you made the contact, if it's not in their computer log, for
whatever reason, it can't be confirmed.
Kevin K3OX
- Original Messag
er log, for
whatever reason, it can't be confirmed.
Kevin K3OX
- Original Message -
From: "Charlie Cunningham"
To: "Eddy Swynar" , topband@contesting.com
Sent: Saturday, February 7, 2015 12:46:02 AM
Subject: Re: Topband: K1N On Line Log
Well, we did survive jus
Well, we did survive just fine, Eddy and lots of folks mad the Honor Roll,
5BDXCC etc..
All this nonsense about the online logs is just so much Bull!!! Can all be
avoided if folks would do the following:\
1.0 COPY your own call!!! No guesswork, no fragments, no bluffing etc.
2.0 Copy y
Hi, Herb
Did you work K1N on 1817.5 this evening?
73,
Charlie, K4OTV
-Original Message-
From: Charlie Cunningham [mailto:charlie-cunning...@nc.rr.com]
Sent: Friday, February 06, 2015 7:59 PM
To: 'Herbert Schoenbohm'; 'topband@contesting.com'
Subject: RE: Topband: K1
They may still be using that dipole hanging from the lighthouse, Art! I
don't know that for sure, but thepy had BIG 160 signals when I worked the
early in the week on 160. I understand that t he;y have been installing
Beverages for receiving. That dipole was more or less vertical from what I
coul
Right now, Herb. 1817.3 up a couple.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Herbert
Schoenbohm
Sent: Friday, February 06, 2015 5:41 PM
To: topband@contesting.com
Subject: Re: Topband: K1N what time are they QRV on top?
Th
Yeah- I saw that Tree's 160 QSO is back in log now. Maybe yours is there?
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Dave
Clouser
Sent: Friday, February 06, 2015 1:16 PM
To: topband@contesting.com
Subject: Re: Topband: Missin
Well, Tree, I think you might make a good case for a duplicate contact! My
160 QSO disappeared for a while, but eventually re-appeared! GL!\
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tree
Sent: Friday, February 06, 2015 12:58
I certainly agree with your final point, Mike! Amen!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Michael
Walker
Sent: Friday, February 06, 2015 10:35 AM
To: topband@contesting.com
Subject: Re: Topband: K1N On Line Log
I
Hi, Jim
Well, it was a bit of a wait, but all 6 of my QSOs are back online now,
including 160. I also got 'em on 80 and 160 - but - wonder of wonders - I
wkd 'em on 160 fairly quickly on 160 with my 80m GP that, at the moment has
only one radial! I've been off the air for a while struggling with
You may be right, Tree. My 160 QSO is in there, but I worked them night
before last with my 80m GP with ONE radial! What a surprise! Just thought
I'd hoot at 'em because they had such a good signal here in NC.
It took my 12m and 15 m QSOs another day to show up!
73,
Charlie, K4OTV
-Origi
Hi, Jim
Well those are the class of capacitors that I was referring to and we used
them in electricity meters that had to operate from line voltages as high as
480 VAC - high-line -or 530 VAC, and of course cope with the hellish spikes
and surges on the line side of the meters. And you are correc
have seen my share of fried line bypass capacitors in consumer
electronics and radio gear.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of HAROLD
SMITH JR
Sent: Wednesday, February 04, 2015 9:16 PM
To: Charlie Cunningham;
Hi, Paul
For AC line bypass capacitors look for UL-rated Ceramic Disc capacitors that
typically have AC working voltages like 250 VAC or higher. These are
designed and rated for AC line service and can take the surges that occur on
AC lines.
Check Digi-Key, Newark and others - you'll find plenty!
T hanks for the correction, Stan. My old eyes missed that!! A 90' tower won't
require much top-loading at all!
Sorry for my error
73,
Charlie, K4OTV
-Original Message-
From: Stan Stockton [mailto:wa5...@gmail.com]
Sent: Wednesday, February 04, 2015 1:41 PM
To: Charlie
Gee, I surely agree with Grant, Larry! I've used EZNEC for MANY years, with
great results, and I've designed, built, tested and measured many wonderful
EZNEC designs - including some really complex "killer" antennas!
I do think that 28' top loading wires will be WAY TOO SHORT atop 50 ft. of
Hi, Eddy
I used one of the old Ameco vacuum tube preamp/pre-selectors, that I
borrowed from my friend, bill, K4CIA, for my KAZ terminated receiving loops
several years ago. It was great! - had plenty of gain and because it was
vacuum tube, it wasn't susceptible to damage from transmit RF picked u
In the installation that Chet describes, I wouldn't expect much interaction
between the vertically polarized Inverted L and the horizontally polarized
inverted Vee. I would expect MUCH more interaction between the inverted L
and the tower.
I also would not expect a lot of interaction between the i
Look for KL7KY, WL7E, - both on 160 1/24.2015 - especially WL7E - Probably
in CQ 160 WW contest. Both use LOTW.
GL!
73, Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Goldtr8
(KD8NNU)
Sent: Saturday, January 24, 2015 11:26 AM
To:
Multi-path was my thought as well!
Merry Christmas!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
Sent: Thursday, December 25, 2014 11:02 AM
To: Richard (Rick) Karlquist; Art Roberts - W5AER; topband@contesting.com
Subj
es should help you a LOT! Have fun and have a Merry Christmas!
73,
Charlie, K4OTV
-Original Message-
From: Larry K4AB [mailto:larry.k...@gmail.com]
Sent: Wednesday, December 10, 2014 8:23 PM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: 160 Shunt-Fed Tower Readin
N0!! That's the equivalent series capacitance that correspond to -j5.6ohms
capacitive reactance! It would be much clearer if the analyzer would present
it in that form, since it clearly has determined the sign - since it's
indicating an equivalent capacitance.
Anyway, I stand by what I wrote you,
sting.com] On Behalf Of Larry
K4AB
Sent: Wednesday, December 10, 2014 6:14 PM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: 160 Shunt-Fed Tower Readings
" line
>Why do you feel a need to improve it?
Thanks for the response, Charlie!
I'm concerned about a fe
>From your description and your measured data, Larry, I don't see how you
could improve the antenna noticeably! Why do you feel a need to improve it?
I appears to be resonant, well-matched and it appears to have an excellent
ground image system! I think you might be kidding yourself if you chang
Thanks for all the info and the memories, Paul!!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Paul
Christensen
Sent: Saturday, December 06, 2014 9:47 AM
To: topband@contesting.com
Subject: Re: Topband: EZNEC 5.0 +
> Not sure th
Thanks, Carl
I suppose all those wires helped to increase bandwidth.
Charlie
K4OTV
-Original Message-
From: Carl [mailto:k...@jeremy.qozzy.com]
Sent: Saturday, December 06, 2014 10:20 AM
To: Charlie Cunningham; 'Paul Christensen'; 'topband'
Subject: Re: Topband:
Not sure that I can picture just what you are describing, Paul. Even though, I
wasn't born until 1944, I've explored just about every type of antenna and I've
modeled an awful lot of them.
Of course the typical inverted L is just a monopole that is bent over at the
top to reduce the required su
Well, I would respectfully disagree with Tom, that "Return Loss" is
confusing or ,misleading. It's just another way of looking at reflections
that often makes more sense of is more useful. For example, many filters
etc. are specified in terms of their input return loss, usually in a 50 ohm
system,a
Hi, Chuck
Well return loss is a transmission line term that is a measure of the
reflection on the line. So a transmission line that is terminated in its
characteristic impedance would have 0 reflection, or infinite return loss or
1.0:1 VSWR. Conversely if the line was lossless and terminated in an
I had good results with a matching transformer for 50-800 ohms for a
terminated KAZ receiving loop, that was wound on a binocular core of 73
material. Very modest turn count. I wound it as a conventional transformer
with wire-wrap wire to accommodate the small core. The loop worked VERY well
on 16
I've had good success winding matching transformers for terminated RX loops,
on these cores with wire-wrap wire.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown
Sent: Thursday, November 27, 2014 4:11 PM
To: topband@contest
Hi, Joe
Sounds like things are3 progressing nicely! I also live on a small lot and I
worked DX all over the world with and inverted L that only had two elevated
resonant radials at 90 degrees to each other.
Couple comments regarding you VSWR observations;
1.0 A perfectly tuned resonant inver
To elaborate a bit on Tom's point -14 ga wire would have approximately 0.4
uH/ft of inductance, so 40 feet of 14 ga wire would be around 16 uH with an
inductive reactance at 1.8 MHz of around j180 ohms.
Compare this with the radiation resistance of the 1/4 wave inverted L, of
perhaps 10-30 ohms re
Hi, Joe
I didn't have time to write you earlier. It was obvious that you had a lot
of ground loss in series with the radiation resistance of the inverted-L
that was swamping the reactance variation of the inverted L. You are
likely to be very pleasantly surprised at how effective two elevated
re
That loop might do better for DX if you fed it 1/2 way up one end.
73,
Charlie, K4OTV
-Original Message-
From: Charlie Cunningham [mailto:charlie-cunning...@nc.rr.com]
Sent: Tuesday, November 11, 2014 12:54 AM
To: 'W3AW'
Subject: RE: Topband: Balun or no balun
Why the 30&
Well, that is exactly what it's all about, Dan!!
Some of us need to press those points really hard with FCC and ARRL! They
are trying to usurp our amateur spectrum for commercial and monetary
purposes
And it really IS about the maritime services!! They are wanting to provide
Internet services i
or so of
splitter loss.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Friday, March 14, 2014 10:41 AM
To: Charlie Cunningham; garyk...@wi.rr.com; 'Topband Mailing List'
Subject: Re: Topband: Passive Receive A
One word of caution, Gary, if the CATV splitter is a transformer type,
rather than resistive it may of have enough low-frequency response for 160
m! Check around with RS and your local electronics stores for 50 ohm 2-way
splitters. Those are generally resistive and have frequency response from DC
That should work fine, Gary! You would have around 3 dB loss in a two-way
splitter + a SMALL amount of mismatch-loss for the 50-75 ohm mismatch. I
would expect that if your radio will work with the beverage signal, you
won't likely need the preamp to make up for tha very modest loss from the
split
ial" activity in the amateur bands!! WE
DON'T NEED OR WANT THIS!! PLEASE CONTACT YOUR ARRL REPRESENTATIVES AND ASK
THEM TO OPPOSE THIS BLATANT "GRAB" FOR OUR SPECTRUM FOR NON-AMATEUR PURPOSES!
Best regards,
Charlie Cunningham, K4OTV
-Original Message-
From: Topband [m
om] On Behalf Of Jim Brown
Sent: Wednesday, March 05, 2014 12:25 AM
To: topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
On 3/4/2014 7:04 PM, Charlie Cunningham wrote:
> I'd also like to be able to apply VNA measurements to some of my HF
antennas
> and I might be willin
Well, I might be willing to use a VNA that attaches to a computer in my Lab,
if I could get away with much lower cost than one of the Agilent or Rhode
and Schwarz VNAs. I'd like to have the capability to cover the 2.5 GHz
band and go considerably higher so I could look at harmonic filters for
2.5
Well, of course we don't, Mike. That was just a comment about the challenges
of calibrating tiny transmission lines for use with a VNA. No microscopes
needed for RG-8 or even RG-58! :-)
73,
Charie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf O
light"! J
73,
Charlie, K4OTV
From: HAROLD SMITH JR [mailto:w0ri...@sbcglobal.net]
Sent: Tuesday, March 04, 2014 6:32 PM
To: Charlie Cunningham; 'Carl'; j...@audiosystemsgroup.com;
topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
This sure doesn't
What the hell is the need for wideband data in the amateur radio bands? Is
it just a ploy to usurp the amateur bands for commercial purposes? And
there's a heck of a lot more band width available at VHF and UHF! Why
wideband at HF?? Makes no sense to me!
??
Charlie, K4OTV
-Original Message
al Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Tuesday, March 04, 2014 3:01 PM
To: Charlie Cunningham; j...@audiosystemsgroup.com; topband@contesting.com
Subject: Re: Topband: New MFJ 259C available
SMA for the 24GHz, open, thru and short. I also have high en
Those should surely be accurate enough, but what kind of connectors?
Charlie, K4OT V
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Tuesday, March 04, 2014 2:41 PM
To: j...@audiosystemsgroup.com; topband@contesting.com
Subject: Re: Topband
True!! Check out the prices of the Cal kits for the Agilent VNAs!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Jim Brown
Sent: Tuesday, March 04, 2014 1:36 PM
To: topband@contesting.com
Subject: Re: Topband: New MFJ 259C availabl
Perhaps so - but Dale is gong down there to put in a 240' broadcast tower.
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Bruce
Sent: Wednesday, February 26, 2014 6:19 AM
To: topband@contesting.com
Subject: Topband: Fw: AM broadc
That's not so surprising Gary !! te Way the Beverages and similar slow-wave
antennas work is that they depend on the lossy GND underneath for their
operation, so a salt marsh would not be a very beneficial GND structure
under a Beverage!
73,
Charlie, K4OTV
-Original Message-
From: Topba
Well, he's talking about going in November - maybe in time for CQWW CW -but
probably not.
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Joe
Subich, W4TV
Sent: Tuesday, February 25, 2014 4:10 PM
To: topband@contesting.com
Subject: Re: Topband: AM broa
Good point!
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Ashton
Lee
Sent: Tuesday, February 25, 2014 4:03 PM
To: DALE LONG
Cc: topband@contesting.com
Subject: Re: Topband: AM broadcast tower and 160m dxpedition
I would be especially mindful of corr
No, I don't believe 240' is too high - especially if the tower has a base
insulator! It would be so close to 1/2 wave on 160, that it could be fed
very well as a 1/2 wave radiator on 160, either via a parallel tuned tank or
a 1/4 wave of perhaps 450 oh ladder line. A 1/2 wave radiator wis an
excel
arlie
-Original Message-
From: Carl [mailto:k...@jeremy.mv.com]
Sent: Sunday, February 23, 2014 12:56 PM
To: Charlie Cunningham; 'HAROLD SMITH JR'; w9...@aol.com;
topband@contesting.com
Subject: Re: Topband: from Mac Reynolds, w9evi - Rellector post repeats
Im not talking about 2X and no
X?
Thanks and have a good day!
73,
Charlie, K4OTV
-Original Message-
From: ZR [mailto:z...@jeremy.mv.com]
Sent: Sunday, February 23, 2014 11:15 AM
To: Charlie Cunningham; 'HAROLD SMITH JR'; w9...@aol.com;
topband@contesting.com
Subject: Re: Topband: from Mac Reynolds, w9
what appears to be a really good solution to his
antenna design and I expect to see good results!
Thanks for your update and input, Harold! Have a good day!
73,
Charlie, K4OTV
From: HAROLD SMITH JR [mailto:w0ri...@sbcglobal.net]
Sent: Sunday, February 23, 2014 10:35 AM
To: Charlie Cunni
Good morning, Mac
Please let me know if you see further repeats of any of my posts to the
reflector. No one else had told me about that, so I appreciate your letting
me know. After your e-mail, I did restart my computer and did a malware
scan. The malware scan did find one item that needed to b
Good morning, JC
Well, in its present configuration, Carl's antenna is not really a folded
monopole, although it did start our as one when he had his gamma match
connected at full height of 90'. At present he has his gamma attached at
67' - about 2/3 of the way up the tower. But that's sort of a
> So maybe you can explain where the 1.0 at the transmitter end with the cap
> in the box came from?
> Additionally the VSWR may/will change with added radials and ground
> moisture conditions.
>
> I'm going out for several hours so no rush on the answers.
>
> Carl
&
Exactly! All true and Tom is right on point! You have removed a lot of
series reactance with that "gamma cage", Carl -as indicated by the required
tuning C changing.from 160 pF ot over 400 pF. OF COURSE the Q was reduced as
the series reactance was reduced and the real part stayed fairly constan
o maybe you can explain where the 1.0 at the transmitter end with the cap
> in the box came from?
> Additionally the VSWR may/will change with added radials and ground
> moisture conditions.
>
> I'm going out for several hours so no rush on the answers.
>
> Carl
> KM1
t be 1:1 at any frequency but more of the curve
will lie within the chosen SWR circle.
73, Roger
On 2/22/2014 11:03 AM, Charlie Cunningham wrote:
> Well, I agree with all that, Carl. But Carl Braun, was reading "dead-flat"
> 1:1 at the transmitter end of his cable. I believe he is done
lie"!
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Saturday, February 22, 2014 10:41 AM
To: Charlie Cunningham; 'Carl Braun'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developm
Behalf Of Carl
Sent: Saturday, February 22, 2014 9:46 AM
To: Charlie Cunningham; 'Carl Braun'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments
That 1.3 is only at ONE frequency Charlie, he is not crystal controlled.
What is the 2:1 bandwidth at t
And people DRINK this stuff!!?? :)
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Larry
Sent: Saturday, February 22, 2014 9:17 AM
To: topband@contesting.com
Subject: Re: Topband: Control cable black conductors
Phosphoric acid is still listed.
73, L
I don't expect that ANY of those are valid concerns at 1.3:1 VSWR!!
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Sent: Saturday, February 22, 2014 9:14 AM
To: Charlie Cunningham; 'Carl Braun'; '160'
Subject: Re: T
I completely agree with Tom. Carl! I'd leave it alone(for the reasons that
I stated previously)! I expect that you would lose more than you would gain
by adding an inductor!! "If it ain't broke don't "fix" it"!!
You might want to put some effort into a good terminated receiving loop!
73,
Char
rl.br...@lairdtech.com]
Sent: Saturday, February 22, 2014 7:23 AM
To: Charlie Cunningham; 'ZR'; '160'
Subject: RE: Topband: Shunt feeding the Skyneedle - new developments
Charlie
Thanks for the tip. I may play with a bit of inductance just to see how the
system reacts.
Not sure if I ca
riginal Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Friday, February 21, 2014 10:56 PM
To: Charlie Cunningham; 'ZR'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments
I'm working on the radial field week
K4OTV
-Original Message-
From: Carl Braun [mailto:carl.br...@lairdtech.com]
Sent: Friday, February 21, 2014 10:39 PM
To: Charlie Cunningham; 'Tom W8JI'; '160'
Subject: RE: Topband: Shunt feeding the Skyneedle - new developments
Charlie
The cap is no where near maxed out. I'm
14 10:31 PM
To: ZR
Cc: Charlie Cunningham; 160
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments
Thanks guys
The j11 ohms is the best I can get period. I was able to get j0 when the cap
was outside of the steel enclosure with a better bandwidth. Maybe I should
throw my $400 encl
ting.com] On Behalf Of ZR
Sent: Friday, February 21, 2014 10:11 PM
To: Charlie Cunningham; 'Carl Braun'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments
The only benefit of getting it better would be a bit more 2:1 VSWR bandwidth
to keep the amp happy b
[mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Friday, February 21, 2014 8:46 PM
To: Charlie Cunningham; 'Tom W8JI'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments
Thanks to all who replied
Tom W8JI, your comments on the metallic panel
I'd think your Henry would match that just fine WITHOUT the Nye Viking
tuner!!
73,
Charlie. K4OTV
-Original Message-
From: Carl Braun [mailto:carl.br...@lairdtech.com]
Sent: Friday, February 21, 2014 8:46 PM
To: Charlie Cunningham; 'Tom W8JI'; '160'
Subject: R
to:topband-boun...@contesting.com] On Behalf Of Charlie
Cunningham
Sent: Friday, February 21, 2014 8:30 PM
To: 'Tom W8JI'; 'Carl Braun'; '160'
Subject: Re: Topband: Shunt feeding the Skyneedle - new developments BTW
BTW. Carl
I agree completely with Tom that there&#
BTW. Carl
I agree completely with Tom that there's no point in having a static-bleed
choke on a grounded shunt fed tower!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
Sent: Friday, February 21, 2014 8:02 PM
To: Car
Well, Carl
I plotted your 45-j11 load on a Smith Chart (normalized to 50 ohms) and it's
very near the origin on a 1.3:1 VSWR circle. Since you have a relatively
short feedline of LMR-400, You should be able to just tune it out at the
transmitter end of the line, and the LMR-400 line will be operat
Interesting! Thanks for sharing, Bruce!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Bruce
Sent: Thursday, February 20, 2014 2:16 PM
To: topband@contesting.com
Subject: Topband: 160 condx2nd CME impact
http://www.spaceweat
Hi Gary! I'm surprised at wabbits chewing coax! Usually squirrels!
Although I would hope the coyote urine would help in any case. The little
"tree rats" can be really destructive!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Ga
FB. Gary! Glad you got it resolved!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Gary
Smith
Sent: Wednesday, February 19, 2014 2:05 PM
To: Topband@contesting.com
Subject: Re: Topband: Coax issues
Resolution: Eat more rabbit.
BTW, Gary
Are you using "crimp-on" connectors on your coax?
73,
Charlie, K4OTV
-Original Message-
From: Tom W8JI [mailto:w...@w8ji.com]
Sent: Wednesday, February 19, 2014 12:21 PM
To: Jim F.; Charlie Cunningham; g...@ka1j.com; Topband@contesting.com
Subject: Re: Topband: C
Hi, Gary!
I hope you've measured the antenna directly with your MFJ 259B with the coax
disconnected to be sure that the antenna hasn't changed in some way. Think
I'd check that (if you haven't already) before undertaking any heroic
fault-finding measures, After that, I'd probably bet on the conne
-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Sunday, February 16, 2014 10:49 AM
To: Charlie Cunningham
Cc: topband@contesting.com
Subject: Re: Topband: Update from AG6X shunt feed project
Thanks Charlie
I haven't transmitted on the antenna yet b
Wow!, that's perfect, Carl!! That should result in better than 1.2:1 load
VSWR!! No wonder you see a "flat" line at the transmitter end! Looks like
either 90' or 67' would be good tap points, but 67' is better! Can't do
much better than 42 ohms feed-point resistance!
If you're seeing a flat lin
Walt surely did "know his stuff" and he published some great material!!
73,
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
Sent: Saturday, February 15, 2014 4:31 PM
To: Top Band Contesting
Subject: Re: Topband: Palomar R-X Noi
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