Hi Tomas,
Sorry I didn’t hear you calling. ZL3IO made it in the log after some good
operating and persistence on his part. I got the IO first, but maybe 8 ? More
calls on his part until the ZL was heard, and I filled in the 3 on my own.
VK2GR was really loud, but he hear me and disappeared
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
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
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
_
Searchable Archives: http://www.contesting.com/_topband - Topband
Stan ZF9CW said:
For the verticals I have put up on a temporary basis very close to the water, I
am pleased with just two elevated radials. I tried radials on the ground and
in the water but as you and others have said, everything changes with the tide
and when the waves get big.
If anyone
I’m planning a 2ele 160m array using the Christman phasing method. Each
vertical will be about 80-90’ tall hung from trees, each using 2 sloping
top-loading wires. I assume the elements won’t be exactly 90 degrees apart, but
I could slope 1 element so the bases are 90 degrees apart.
Are
QRM in pileups and contests.
>
> 73, Gary
> K9AY
>
>
>
> ---
> Date: Tue, 23 Aug 2022 16:07:26 -0400
> From: Kenny Silverman
> To: topband
> Subject: Topband: Beverage upgrade question
> Message-ID: <37a3e9d4-31fa-4b56-bddf-320c6bd50...@gmail.com>
In a rural area with no significant man made noise, if you redesign a beverage
for better RDF when do you start to notice a difference?
I’m considering upgrading my single EU beverage at 625’ (190m) to a pair in
echelon where will each be 550’ (168m) with 20’ (6m) spacing . The increase in
Dino, you didn’t Mention if you were building a house on the 5 acres. If so,
that would limit your choices depending on where the house is.
I’m on 6 acres and at best I could get 2 elements either to the NE or
east-west. If you go to my QRZ.com page my property layout is at the bottom.
My
YRO says: DX Propagation has again been reasonable the past few nights, but not
many
stations on the band.
Conditions last night were pretty good from Virginia, though the band
conditions seem to peak after 0230z. VU2GSM was heard at his sunrise but I
think I was the only caller. He said he
Thanks Frank. Are these 1/4 wl lines? And are T-connectors OK?
Regards , Kenny K2KW
> On Jan 17, 2022, at 11:29 AM, Frank W3LPL wrote:
>
> Hi Kenny,
>
> A very workable alternative is to use two lengths of 75 ohm coax
> in parallel. RG-11 is the best choice, but two lengths of RG-6
> will
Does anyone have a drawing on how to wind a 1500w 1:2 UNUN? And what type of
core is needed?
This is for my 160m vertical which is about 28 ohms.
Regards , Kenny K2KW
_
Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
N6BT’s ring is pretty flexible in its dimensions. It can be 3 or 4 sides (or
anywhere in between) and can handle some variation in symmetry.
I’ve been having issues finding a solution to the high tree attenuation on my
property and I had an inverted L with the ring and another inverted L 340’
> that what is doing the damage is the *feedlines* for said antennas, not
> necessarily the antennas themselves. Time for K9YC common mode chokes?
>
> ---
> Rick Karlquist
> N6RK
>
>
>> On 2021-07-14 10:10, Kenny Silverman wrote:
>>
>> Most if not a
which is the real need. I
will have to see about getting another 80m Rx antenna for domestic summer
contesting
A map of my antennas is now on the bottom of my www.qrz.com/dB/K2KW page.
Regards , Kenny K2KW
> On Jul 12, 2021, at 11:16 AM, Kenny Silverman wrote:
>
> Last winter I in
Last winter I installed 3 single-wire beverages:
625’ to EU
625’ to Carib/SA
450’ to west coast
On 160 the directivity is great, but it’s poor on 80/40. Any thoughts on why?
I don’t have CMC’s on them, could that be the issue?
Regards , Kenny K2KW
_
Searchable Archives:
What are the mechanical issues and solutions when using RG6 as the beverage
element?
Should cable with a messenger wire always be used? Does the messenger wire get
connected to anything?
Do I need different insulators than used for single wire beverages?
I looked in the archives but I didn’t
22'
> SWR bandwidth normalized to the antenna input resistance of 23 ohms
> SWR bandwidth is 72kHz
>
>Dave KH6AQ
>
>
>> On Mon, Jan 4, 2021 at 5:07 AM Kenny Silverman wrote:
>> Hello and HNY!
>>
>> I will be converting a wire inverted-L to a T top loadi
d bandwidth. 73 Clive
> GM3POI/GM3X
>
> -Original Message-
> From: Topband On Behalf Of
> Kenny Silverman
> Sent: 04 January 2021 15:06
> To: TopBand List
> Subject: Topband: Cage wire performance
>
> Hello and HNY!
>
> I will be converting a wire inve
Hello and HNY!
I will be converting a wire inverted-L to a T top loading on a 75’ tall wire
hung from a tree. To improve the bandwidth, I was wondering about going to a
2-wire “cage” for the vertical section. I’m actually modeling a skinny triangle
where the wires connect at a point on the
Thanks Mike. I wasn’t sure if one was needed where the coax exits the radial
field
Regards , Kenny K2KW
> On Dec 31, 2020, at 8:01 PM, Michael Walker wrote:
>
> Hi Ken
>
> Chokes at both ends of the feed line are always a good idea.
>
> I have a similar setup to you but with elevated
the front-to-rear ratio, but the beamwidth of the main lobe
> isn't narrowed like a broadside pair of wide spaced broadside Beverages.
>
> Good luck!
>
> 73
> Frank
> W3LPL
>
> From: "Kenny Silverman"
> To: "160"
> Sent: Sunday, October 18,
My new house has 6 wooded acres in roughly a square. For EU, I was hoping to
get a pair of phased 500’ beverages spaced 350’ apart. To do that, one of the 2
beverages will be 110’ in front of the other due to the lot-line orientation.
Regardless of the phasing I’m modeling, the side and back
Hi All,
Thanks again for your help back In December. KC4D’s 135’ tower (110 degrees
electrical length) with an omega match is up and running. There are 60 110’
radials though half go out 40’ and are coiled up until permission is arranged
to go on neighbors land. The shunt is a 4 wire cage
I agree that 5m high is better for elevates radials. If you go with 2 full
size radials, start the radials as a dipole at the installed height and tune to
resonance. Once tuned, remove the coax and short the dipole and that will be
the connection point for the vertical. Then modify the
and the boom
> alone is enough top loading.
>
> I still feel your tower is too tall - but we have already talked about that.
> I do not know if modeling really works for this - but haven't seriously tried
> it.
>
> Tree N6TR/7
> Manning, OR
>
>> On Mo
Hi All, we’re planning on gamma loading a 130’ tower with a stack of StepIR
antennas using a cage for the shunt wire. We have modeled the tower. Question:
is the model sufficient to determine the gamma wire height? Or is the
procedure to use a single wire to per the model height first to
tion "65+ Tower L Bend", and
> illustrates what goes on with the RF current down at the base of the tower,
> which is the same issue with the N4KG feed. Even if you could care less about
> an L/FCP, the issue at the bottom of the tower is the same for both, and the
> documentation for
I meant to ask if the antenna efficiency (dB) was better with either feed
method.
Regards , Kenny K2KW
> On Dec 3, 2018, at 10:15 AM, Kenny Silverman wrote:
>
> Has any analysis even done comparing the N4KG reverse-fed tower feed method
> with elevated radials vs a shunt o
Has any analysis even done comparing the N4KG reverse-fed tower feed method
with elevated radials vs a shunt or omega feed with ground radials?
This is a tall tower and I think it will be close to self resonance or longer.
Regards , Kenny K2KW
_
Searchable Archives:
Bob. Your impedance is likely in the 25 ohm range, so you would need a 2:1
balun. A 4:1 likely overshot the 50 ohm mark. I'd just go with a hair pin coil
between the vertical and ground. About 10 turns and maybe 3 diameter. Spread
coil to change match. Should get you to 1:1. Kenny K2KW
Sent
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