Get on and have some QRP fun tonight !
http://www.naqcc.info/sprint/sprint201901_160.html
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Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
Follow the link to the rules. Basically, stay in the USA band. Regions outside
of the USA have different band segments than we do. (Important if you are on a
DXpedition and want to work JAs.) Also, it would be good to stay out of the FT8
segment.
Ralph
K9ZO
On 1/22/2019 8:03 AM, Bruce wrote:
You maybe confusing "Radiation Resistance" with "Feed point Resistance". It
often will lower "Feed point Resistance", but raise "radiation Resistance".
Really? Why?
Wes N7WS
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Searchable Archives: http://www.contesting.com/_topband -
The Super CMOS 3 partial keyer kit has the same features as the Logikey
K-5 and will key neg. voltages with a few extra components if I remember
correctly. However, you do have to provide the box, button switches and
connectors etc yourself. Details are on the Hamsupply/Idiom Press web site.
>So, now we're (apparently) recommending he cut back his already minimal
radial field..uhhh, really Wes?
I agree with Wes' assessment -- as well as him questioning why Rr would
increase with an increased number of radials. If Rr is changing
significantly with the increase, then something else is
I started this message a day or so ago. Others have commented since with some
similar thoughts, nevertheless, here is my take.
Todd you're going the wrong direction. The feed point resistance should be going
down.
A 1/4 wave wire vertical should have a radiation resistance(Rr) of around 35
I've been using the Logikit CMOS 4 Electronic Keyer (the K5’s little
brother) for so long I can’t remember when I got it.
The only drawback is that the original buttons wear out; that’s a known
issue with the CMOS-4. I replaced them with 4 buttons from Radio Shack
years ago and have had no
Have to pay attention to everything he is reporting. He added a feedpoint
choke per K9YC at the same time. Which may, depending on the physical
connections at his feedpoint, have removed the feedline shield as an
alternate “radial” in parallel with the increasing but still not full size
radial
So, now we're (apparently) recommending he cut back his already minimal
radial field..uhhh, really Wes?
=-Mike VE9AA
I started this message a day or so ago. Others have commented since with
some similar thoughts, nevertheless, here is my take.
Todd you're going the wrong direction.
Exactly!
Sent from my iPhone
> On Jan 22, 2019, at 7:25 PM, Grant Saviers wrote:
>
> Al Christman K3LC thoroughly sliced and diced the tradeoffs of number vs
> length for given total wire investment is his Mar/Apr 2004 NCJ paper.
>
> N6LF also has a lot to say.
>
> Grant KZ1W
>
>> On
Way back some where around the original posting did he not say he had
2 160 antennas up and they are close to each other? a short vertical and
this antenna? If so what is the short vertical doing, is it floating or
grounded or hooked to the ground system yet, what is its status?
Would make
Al Christman K3LC thoroughly sliced and diced the tradeoffs of number vs
length for given total wire investment is his Mar/Apr 2004 NCJ paper.
N6LF also has a lot to say.
Grant KZ1W
On 1/22/2019 16:11 PM, Chortek, Robert L. wrote:
“Wes cut his radial length to match the vertical L section
Announcing the Top Band Dinner at the 2019 Visalia International DX Convention.
Buffet Dinner. Pre-Assigned seating. Door Prizes. $42/person.
Program: "Snapshot: VK9XG to North America on 160m," Chris Duckling, G3SVL and
"KH1/KH7Z Top Band From Baker Island" George Wallner, AA7JV
For the most
I have the K1 original model, a K3 think it is on the desk, and a K5
new in the box
just in case, never used a better keyer, and have tried most of them.
Have a Winkeyer in the drawer and it stays there 99 percent of the
time, its not
a Logikeyer at all.
Merv K9FD
I don't know where you
“Wes cut his radial length to match the vertical L section height (see N6LF
> reference). He didn't reduce the number of radials.”
I didn’t think it was the “shortening” OF the length of the radials that would
improve performance e.g. going from 10 125’ radials to 10 55’ radials (in the
case
I would think adding radials would lower the Radiation resistance. Also,
the SWR curve should narrow as ground losses are reduced; since the effect
of ground loss resistance swamping the results lessens.
At some point I suggest, as others, that you get on for the contest and see
what you can
You maybe confusing "Radiation Resistance" with "Feed point Resistance".
It often will lower "Feed point Resistance", but raise "radiation
Resistance". 73 Bruce
On 1/22/2019 9:45 AM, Peter Bertini wrote:
I would think adding radials would lower the Radiation resistance. Also,
the SWR curve
>"I would think adding radials would lower the Radiation resistance. Also,
the SWR curve should narrow as ground losses are reduced; since the effect
of ground loss resistance swamping the results lessens."
The base resistance, not the radiation resistance is lowered by adding in
radials. At
What is missing from that discussion about a maximized use of a given
investment, is whether that investment however well maximized, is in fact
adequate for the particular ground characteristics and circumstances.
Four rotten eggs will deliver a rotten omelette no matter what you mix in
or how
Meant to say “should not decrease loss ...”
Sorry!
Bob AA6VB
Sent from my iPhone
> On Jan 22, 2019, at 4:11 PM, Chortek, Robert L.
> wrote:
>
> “Wes cut his radial length to match the vertical L section height (see N6LF
>> reference). He didn't reduce the number of radials.”
>
> I didn’t
-- Forwarded message -
From: Jim Brown
Date: Mon, Jan 21, 2019, 11:36 PM
Subject: Re: Topband: Inverted L improvements - Part 3 (now with data)
To: Mike Waters
After nearly a year of work, I published a new "cookbook" last month.
For reasons that are detailed in the accompanying
Mike and Jim
Thanks for posting this good info..
Timely for me anyway.
Fred KB4QZH
Mike Waters wrote:
> -- Forwarded message -
> From: Jim Brown
> Date: Mon, Jan 21, 2019, 11:36 PM
> Subject: Re: Topband: Inverted L improvements - Part 3 (now with data)
> To: Mike Waters
All,
Thanks for feedback regarding "QRG on 160 in North and South America"
It seems that i.e. 1821.5 an up to 28.5 on odd QRG is ok for USA and EU
For i.e March 10th the 45 to 60 min greyline window in JA, TX could be as
low as 1813.5 and lsn up.
For the ZL guys it is just after our SS and
Todd,
The resistive component should be going down with more radials, not up.
Maybe you are not measuring it the right way, or something in the radial
system could be resonant (which may be a good thing).
Normally, with these antennas, lower R is better (less loss).
I have just measured a top
Hello all,
This is slightly off-topic but I was wondering if maybe I could get some help
with this. I am
looking for a "Logikey K-5" electronic CW keyer. I went to the Idiom Press web
site and
found out that they have "sold out" of them and there is no information on any
future
availability of
I don't know where you can find them now, but you will have to pry my K5 from
my cold dead hands!! Seriously, I built a WinKeyer for Field Day use and found
it very nice with the advantage of the computer interface.
Keith - AC9S
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Searchable Archives:
Indeed, that is what I meant to say.
On Tue, Jan 22, 2019 at 10:03 AM Bruce wrote:
> You maybe confusing "Radiation Resistance" with "Feed point Resistance".
> It often will lower "Feed point Resistance", but raise "radiation
> Resistance". 73 Bruce
>
> On 1/22/2019 9:45 AM, Peter Bertini
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