On 12/27/2023 7:35 AM, Jon Zaimes, AA1K via Topband wrote:
Spacing is 1/4 wave.
I haven't looked at spacing for verticals, but optimum spacing for VE3DO
loops worked out to be 5/8 wavelengths, which I am lucky to have.
73, Jim K9YC
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Hi Jon, thanks for your input. So I guess the antenna pattern is simply
the spacing of the antennas and the phase you dial in, but you would need
the antennas aligned so the null was in the correct direction?
73 and HNY Kenny K2KW
On Wed, Dec 27, 2023 at 10:35 AM Jon Zaimes, AA1K wrote:
> I
Wow Jon - what an excellent setup you have there.
However, I think it is unfair that your RX antennas are 1000 feet closer to
Europe. Given the fact that you are so close to Europe (compared to us on
the West Coast), that is a significant difference and seems
unsportsmanlike. :-)
All kidding
I use NCC-1 and NCC-2 boxes for phasing numerous receive antennas, mostly on
160. My property is heavily wooded, with antennas among loblolly pines, oak,
maple, gum, etc.
For in-band listening while transmitting on 160, I have a pair of 34-foot
verticals (self-supporting aluminum elements)
I did exactly the same thing as what Tree describes. It worked pretty
well using just a Kenwood TS-570 as the 2nd receiver. Getting a really
deep null on the loop requires attention to various details:
1. RF leakage into the feedline
2. Nearby metallic objects messing up the pattern of the
Clymer
Sent: Tuesday, December 19, 2023 7:58 AM
To: n...@comcast.net
Cc: Jim Brown ; topband
Subject: Re: Topband: NCC-2 antenna pattern?
Come on, JC...
Even I know, YOU know what K9YC is talking about! After living in IN for 15
years, CA for 34 years, and VA for 10 years, with essentially the same
Come on, JC...
Even I know, YOU know what K9YC is talking about! After living in IN for 15
years, CA for 34 years, and VA for 10 years, with essentially the same
station setup, over the long term, for success on TB, QTH is paramount.
(detuned TX antennas notwithstanding)
BTW: I like your initials!
So you cannot detune a TX antenna in IL, just in Florida?
JC
Archives: http://www.contesting.com/_topband - Topband Reflector
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On 12/18/2023 5:35 AM, n...@comcast.net wrote:
Hi Rob, my city lot backyard is 50x100 and I worked (CW only) 305
confirmed on 160m from 2006 to 2019
You're in Florida. Rob is in IL. Very different. Most of your path to
country-rich EU and SA is over water, and not via the AU oval. Even
n 1/5 acre and he worked #315 from 2003 to 2019,. So don't
give up. topband is a fantastic band when you can hear the weak signals.
73's
JC
N4IS
-Original Message-
From: Topband On Behalf Of
Rob Atkinson
Sent: Monday, December 18, 2023 6:14 AM
To: topband@contesting.com
Subject: Re: Topb
Since I am on a 50 x 100 foot lot, it is impossible for me to separate
my rx antennas from my tx antenna. Of course on transmit, preamps and
the NCC1 are deactivated, but even so, the NCC1 had internal relay
chatter (there are around nine PC board mounted relays inside). Small
RF chokes in
OK Kenny. I understand now. Not all of the TX will be under control of
the transceiver at the operating position that is using the in-band
antenna, so you need RF protection while also receiving in-band. I think
your phased vertical idea could work. But, a pair of flag antennas would
also work
HI Tree,
Thanks for your input. I'm leaning towards a 2 element phased vertical
array with a quasi-cardioid pattern for my application. it will avoid any
phasing box overload issues.
73, Kenny K2KW
On Sun, Dec 17, 2023 at 2:12 PM Tree wrote:
> I think the concern about overload is another
I think the concern about overload is another reason to not consider it.
That box is not designed to handle a strong signal like another transmitter.
One other solution is to try and come up with a coax length that presents
an out of phase signal at the right amplitude to cancel it out on the 2nd
Thanks for all the comments, but knowing what the resulting antenna pattern
seems elusive.
I need in-band RX antenna for a mult station. Typically antenna separation,
front-to-back and polarization are the main tools for that. When I run out of
room
I was wondering if phasing from an NCC-2
I'm not sure we still understand the intended application of the
original poster, I know I don't.
I've done lots of work with loops and loop arrays phased either
passively (active or entirely passive external phaser boxes) or actively
phased via an SDR but none of that would eliminate the
-Original Message-
From: Topband On
Behalf Of Kenny Silverman
Sent: Saturday, December 16, 2023 10:05 PM
To: Rick Kunath
Cc: topband
Subject: Re: Topband: NCC-2 antenna pattern?
Rick, my application is for an in-band RX antenna, but on a higher band. I just
thought the guys here might know more
Subject: Re: Topband: NCC-2 antenna pattern?
Rick, my application is for an in-band RX antenna, but on a higher band. I just
thought the guys here might know more about the NCC-2, MFJ or QRM eliminator
than most others.
One thought was to create a 2 ele phased vertical array for the RX antenna
On 12/16/2023 7:04 PM, Kenny Silverman wrote:
Rick, my application is for an in-band RX antenna, but on a higher band.
As detailed in the link I posted, the NCC2 is designed for use on the
lower bands, 160, 80, maybe 60 and 40. My measurements show this. I've
mostly used the VE3DO array on
Lots of good info on some of these posts already.
Although I like a pair of inline flag antennas terminated with VACTROLs
separated by 100 feet inline better than the center feed/terminated
design I saw earlier. Great F/B and tweakable remotely to make sure that
F.B is maxedd at the frequency
Rick, my application is for an in-band RX antenna, but on a higher band. I just
thought the guys here might know more about the NCC-2, MFJ or QRM eliminator
than most others.
One thought was to create a 2 ele phased vertical array for the RX antenna with
a known pattern and put the null
On 12/16/2023 5:46 PM, Kenny Silverman wrote:
Does the NCC-2 create a predictable antenna pattern? I’m just wondering
how to null the noise but not create some weird pattern which may also
produce a null in the desired direction.
Here's how it can be made to work with suitable antennas.
What's your application Kenny and what would you be feeding the antenna
output of the phaser into?
Rick Kunath, K9AO
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I am not sure "predictable" is one of the attributes I would use when using
one of these devices.
Really - the real benefit of them is to annihilate a local noise source. I
remember getting a really deep null (50 db) on a station that was about 1
mile away with a similar device.
I did spend
Does the NCC-2 create a predictable antenna pattern? I’m just wondering how to
null the noise but not create some weird pattern which may also produce a null
in the desired direction.
Regards , Kenny K2KW
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