I wonder if there is supporting analysis for connecting the radial ends??
I have around 80 elevated radials that range from 50 foot lengths, running east
and west, and 25 foot lengths running north and south (all of that a function
of being geographically challenged). I have not tied the bitter
The lowest loss cable I have here is 75 Ohm 1 General Cable Fused Disc; its
under a differnt name these days. Mostly air with poly discs and used for
the 200' runs for 10M, 2M, and 222 MHz.
For the 160/80 inverted vee it is 450' of regular foamed 3/4 75 Ohm CATV
hardline with a RG-11 jumper
- Original Message -
From: Jim Brown j...@audiosystemsgroup.com
To: 'TopBand' topband@contesting.com
Sent: Saturday, February 15, 2014 12:15 AM
Subject: Re: Topband: Palomar R-X Noise Bridge
On 2/14/2014 7:00 PM, Charlie Cunningham wrote:
All generally true, I expect, but I also
Hi, Carl
I did a bit of further investigation and work on your problem.
I think you are done, as follows:
1.0 Just tap the Skyneedle at 90' and tune out the series inductive
reactance with a variable capacitor, leaving you with 68 ohms real at the
bottom of your drop
I'm a great believer in ferrite sleeve baluns, Carl! That's all that I use,
and with a little work you can even connect two of them for 4:1 nalance.
73,
Charlie, K4OTV
-Original Message-
From: Carl [mailto:k...@jeremy.mv.com]
Sent: Saturday, February 15, 2014 11:05 AM
To: Charlie
Do tell!
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of ZR
Sent: Saturday, February 15, 2014 11:05 AM
To: j...@audiosystemsgroup.com; 'TopBand'
Subject: Re: Topband: Palomar R-X Noise Bridge
- Original Message -
From: Jim Brown
Carl: I've read, at several places, that sleeve baluns are effective at VHF
and above but not at HF frequencies..thoughts??
72/73, Jim Rodenkirch --- former Tempest inspector for the U.S.
Navy..ah...Tempest comcerns - the good 'ol days hi Hi!
From: charlie-cunning...@nc.rr.com
To:
Sorry, Carl!
My loss tables didn't translate from HTML to the reflector. I'll re-build
the tables manually and re-send this message!
Sorry!
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Charlie
Cunningham
Sent: Saturday, February
Hi, Jim
Well, Maxwell's W2DU balu ns are ferrite sleeve baluns and you can get
those that go down to 160m. It's a matter of choosine the right ferrite for
the frequenc;y range of interest, and using enough ferrite to build p the
common-mode impedance!
73,
Charlie, K4OTV
-Original
Hi, Jim
Well, Maxwell's W2DU balu ns are ferrite sleeve baluns and you can get
those that go down to 160m. It's a matter of choosine the right ferrite for
the frequenc;y range of interest, and using enough ferrite to build p the
common-mode impedance!
73,
Charlie, K4OTV
From: James
Dielectric losses become evident at 2M with 1500W and at 432 400W of
steady
carrier will heat up even the best N connectors and RG-213. For that
reason
many are switching to the 7/16 DIN.
That has nothing at all to do with dielectric losses.
N connectors have a tiny BNC size center pin.
The lowest loss cable I have here is 75 Ohm 1 General Cable Fused Disc;
its under a differnt name these days. Mostly air with poly discs and used
for the 200' runs for 10M, 2M, and 222 MHz.
For the 160/80 inverted vee it is 450' of regular foamed 3/4 75 Ohm CATV
hardline with a RG-11 jumper
Well, here it is with the re-built loss table, Carl
73,
Charlie, K4OTV
From: Charlie Cunningham [mailto:charlie-cunning...@nc.rr.com]
Sent: Saturday, February 15, 2014 11:35 AM
To: 'Carl Braun'; '160'
Subject: RE: Topband: Still in search of resonance - Detailed Observations
and
Jim,
Think of a cage connection rather than a single wire to a shunt fed tower
and its benefit. The cage larger diameter causes an impedance change and
also makes it a more broad-banded fat conductor.
Benefits of a in ground grid have been established. A partial grid connected
to radials
Carl: I've read, at several places, that sleeve baluns are effective at
VHF and above but not at HF frequencies..thoughts??
72/73, Jim Rodenkirch --- former Tempest inspector for the U.S.
Navy..ah...Tempest comcerns - the good 'ol days hi Hi!
Oh, the fun we had almost living in a
When using a gamma match you are usually going up on the tower beyond the 50
ohm point. From that point down the gamma rod and the tower is acting like a
parallel wire transmission rod, transforming that impedance down to a lower
value, hopefully near 50. You will see the 50 ohm R plus
- Original Message -
From: Tom W8JI w...@w8ji.com
To: 'TopBand' topband@contesting.com
Sent: Saturday, February 15, 2014 12:08 PM
Subject: Re: Topband: Palomar R-X Noise Bridge
The lowest loss cable I have here is 75 Ohm 1 General Cable Fused Disc;
its under a differnt name these
Charlie
Thank you for your work and insight.
It appears I've I may have provided some incorrect info.
When I tapped the tower at 90' I used the 160pf variable cap to get down to the
68 ohm impedance measurement and, yes, it heard well with what appeared to be a
peak at approx 1770kc I never
Charlie
FYI. I'm using 60' to 70' of LMR400 from my panel at the base of the needle to
the shack. No long runs here.
Carl AG6X
Sent from my iPhone
On Feb 15, 2014, at 9:14 AM, Charlie Cunningham
charlie-cunning...@nc.rr.commailto:charlie-cunning...@nc.rr.com wrote:
Well, here it is with the
Thanks, Carl! Well, if you' heard a RX peak at 1770 KHz, it seems that you
are awfully close! Just needs a little careful tweaking I would think. (I
ass'ume that you are probably shootinf for something around 1830 KHz. BTW -
the higher you tap on the tower, the smaller the series capacitor needs
Tom
After reading your post yesterday I had a dream that I woke up and saw one of
those flying monkeys on top of my tower laughing and sawing away.
Carl AG6X
-Original Message-
From: Tom W8JI [mailto:w...@w8ji.com]
Sent: Friday, February 14, 2014 6:02 PM
To: Carl Braun; '160'
Hee!
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Carl
Braun
Sent: Saturday, February 15, 2014 3:53 PM
To: Tom W8JI; '160'
Subject: Re: Topband: Still in search of resonance
Tom
After reading your post yesterday I had a dream that I woke up and
The step up ratio of a folded dipole occurs because the fed conductor
extends parallel to the un-fed conductor for the entire length of the
antenna. The element or element halves form 1/4 wave shorted stubs in
differential excitation mode, but the current divides by ratios of effective
All true, but I don't thnk Carl needs to shorten his tower or remove the
yagi! I'd just use a series tuning capacitor! :-)
Charlie, K4OTV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
Sent: Saturday, February 15, 2014 4:07 PM
To: Topband
Maxwell sort of stumbled on it in later years with those tiny beads that
seriously overheated with most amps. We started with the type that fit
over RG-213 and went from there to custom made, the big donuts, and sheet
products from pioneers such as Arnold.
Walt Maxwell was not only a real
I just wanted to thank everyone who answered my question about coax impedance
and how it would affect 1/4 wave stub length found and cut using a noise
bridge. It won't. I though that was the way it worked, but I was not sure. I
reasoned this group would have the answer. It did!!
Another
- Original Message -
From: Tom W8JI w...@w8ji.com
To: 'TopBand' topband@contesting.com
Sent: Saturday, February 15, 2014 12:00 PM
Subject: Re: Topband: Palomar R-X Noise Bridge
Dielectric losses become evident at 2M with 1500W and at 432 400W of
steady
carrier will heat up even
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
Absolutely and I had the pleasure of meeting him and hear him speak.
Unfortunately his very public arguments with Warren Bruene in QEX and
elsewhere over the Conjugate Match and then showing up on various forums
to publicly push his last book as part of his legacy (which contains his
final
There's a contest in progress --the ARRL Int. DX CW-- but you wouldn't know
it from listening on 160. Where is everyone?
The only two stations on 160 calling CQ TEST are K3LR and W3LPL.
73, Mike
www.w0btu.com
_
Topband Reflector Archives - http://www.contesting.com/_topband
Band has been poor here in NM. Last night didn't hear Europe at all,
and only about 10 SA and Carrib. Stations. This morning, opening into
Asia was marginal, with only a handful of weak JAs. Even Kim HL5IVL,
who usually blasts through here, was barely out if the noise.
73,
Jim W8ZR
Sent from my
I didn't notice that the K index jumped to 5 until after I posted this.
That doesn't help.
But the 3 or 4 stations that I hear calling CQ are quite strong (S9+) in SW
Missouri.
W3LPL is S9+, but he had a lot of trouble hearing my 1500 watts. Odd.
73, MIke
www.w0btu.com
On Sat, Feb 15, 2014 at
All
I decided to take a chance at tapping the tower at 67' and apply some series
capacitance to see how the structure would work there before tapping it at the
90' level. Here is what I found:
The gamma arm spacing is at 33 and with 140pf in series I see 42+j0 ohms at
the feedpoint. Inside
I didn't notice that the K index jumped to 5 until after I posted this.
That doesn't help.
But the 3 or 4 stations that I hear calling CQ are quite strong (S9+) in
SW
Missouri.
W3LPL is S9+, but he had a lot of trouble hearing my 1500 watts. Odd.
He would hear you better if you were
- Original Message -
From: Tom W8JI w...@w8ji.com
To: Mike Waters mikew...@gmail.com
Cc: topband topband@contesting.com
Sent: Saturday, February 15, 2014 9:58 PM
Subject: Re: Topband: Contest in progress - few signals
W3LPL is S9+, but he had a lot of trouble hearing my 1500 watts.
I kind of thought that might have been the case. :-)
Anyway, the band is much better now. I've been hearing Europe and SA.
73, Mike
www.w0btu.com
On Sat, Feb 15, 2014 at 8:58 PM, Tom W8JI w...@w8ji.com wrote:
W3LPL is S9+, but he had a lot of trouble hearing my 1500 watts. Odd.
He would
Then maybe I misread the rules at
http://www.hornucopia.com/contestcal/weeklycont.php#5126 .
73, Mike
www.w0btu.com
On Sat, Feb 15, 2014 at 9:20 PM, Bruce k...@myfairpoint.net wrote:
W3LPL is S9+, but he had a lot of trouble hearing my 1500 watts. Odd.
From USA Canada- He earns contest
Looks pretty plain, you count for nothing zero nada QRM to another USA
W/VE: Each DXCC country once per band
Non-W/VE: Each state, District of Columbia, VE province/territory once
per band
Then maybe I misread the rules at
http://www.hornucopia.com/contestcal/weeklycont.php#5126 .
73,
Still poor in central KL7. Maybe later. Aurora’s heating up, so maybe never:
http://www.swpc.noaa.gov/pmap/index.html
GL es 73, Gary NL7Y
_
Topband Reflector Archives - http://www.contesting.com/_topband
I'll take your word (and Tom's) for it. But that's not how I interpreted
what Bruce states there.
QSO Points: 3 points per QSO evidently should say:
QSO Points: 3 points per DX QSO.
Thanks.
73, Mike
www.w0btu.com
On Sat, Feb 15, 2014 at 10:13 PM, Merv Schweigert k...@flex.com wrote:
Looks
Hi !
Bad condition ... only W1UE, WE3C = QSO
W3LPL, K3LR copy, calling, but no QSO
Aurora !
http://www.tesis.lebedev.ru/magnetic_storms.html
See on HF
GL in ARRL DX Contest
73! de UR5IFB
Суббота, 15 февраля 2014, 19:29 -09:00 от Gary and Kathleen Pearse
- Original Message -
From: Mike Waters mikew...@gmail.com
To: Merv Schweigert k...@flex.com; topband topband@contesting.com
Sent: Saturday, February 15, 2014 11:39 PM
Subject: Re: Topband: Contest in progress - few signals
I'll take your word (and Tom's) for it. But that's not how I
Operating as W1AW/9 I worked them at 0135Z Saturday night on 80M. They
had a pretty good signal. They were operating high in the band, 3555.
On 2/14/2014 11:21 AM, Jim Brown wrote:
Has anyone heard or worked these guys on 80 or 160?
73, Jim K9YC
_
Topband Reflector Archives
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