hi carl,
nice noise clean spectra - we are fighting with the commercial radio signals. You dont have that at all!.
thanks john s.
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Aloha - john s,
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Nice Carl.? Some "N events" (Narrow band) in there.? Thanks for saving with the camera button and attaching the photos.? That made it super easy to just click on one of your image files to compare with the same region on mine, though it was really far too low here and off the end of my dipole. Jim
On Mon, Dec 9, 2024 at 8:17?AM Carl Pajak Phone via <pajakonice= [email protected]> wrote: Good Day All, Some Weak Io-C .? a bit difficult to see, but there. Comments?
Carl
Wasilla, AK
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Very convincing, Carl!
?
Sabine
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Germany
Standard time: UTC +1 hour
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Sun, Sun, Dec. 9, 2024 Gainesville, FL
Adding to John Cox report, here is the solar emission from today Dec. 9
Francisco
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Solar 12/09/2024 Easley, South Carolina
? ? ? ? ? A bit of solar from today.
? ? ?John?
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Good Day All, Some Weak Io-C .? a bit difficult to see, but there. Comments?
Carl
Wasilla, AK
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Re: 08 Dec 2024 non-Io-A / non-Io-A''
I think I saw some of this on my Indiana dipole. The darker image?used the Normalize function in RSS.? Even in the non-normalized version, you can see the Faraday lanes.
Jim S
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08 Dec 2024 non-Io-A / non-Io-A''
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non IoA 12/08/2024 Easley, South Carolina
Good evening again: ? ? ? I forgot to add the graphics to the weak non IoA from last night. Sorry.
John
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non IoA 12/08/2024 Easley, South Carolina
Good evening: ? ? ?Some very weak non IoA from last night.
John
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Salvador: ? ? ?Good job! I think I captured the same. Good to have some solar to show.
John
Hi,
?
Solar event Today.
?
Regards
?
Salvador
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Solar 12/08/2024 Easley, South Carolina
? ? ? ? ? Solar from today. Some pesky RFI.
? ? John?
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Hi,
?
Solar event Today.
?
Regards
?
Salvador
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non IoB 12/07/2024 Easley, South Carolina
? ? ? ? ? non IoB I think. Nomenclature selection opinions welcomed.
? ? ?John?
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Here's some lackluster Io-A from the 6th.
--
Dave
 ???? 
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IoA 12/06/2024 Easley, South Carolina
Good evening: ? ? ? Weak IoA from 12/06/2024.
John
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Dec. 5, 2024 Io-B, Gainesville, Florida
Adding to the excellent John Cox recording of the N event.
Here is what I saw of the Io-B N event from Gainesville, Fl
Jupiter was a bit beyond the 3-dB point of my antenna to the East.
I also had a lot of background noise.
Francisco
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Re: High Gain and Wide Bandwidth Dipole Antenna.
I have used EZNEC (and ELNEC before that) for a few
decades.? It was written by Roy Lewella, W7EL, and for years he
sold it at a modest price.? He has now retied, though, and made
his latest and most powerful version (EZNEC Pro+ v7.03) completely
free ... no advertising, no limits, no hassles.
The documentation for EZNEC is clear and comprehensive, and there
are multiple YouTube video tutorials on it ... including at least
one by Roy himself.
Aside from using it to model a particular antenna, it is immensely
useful for simply learning about how antennas work in general.?
Radiation from a wire is a function of the current and phase in
the wire at any particular point, and EZNEC can display that
information in a straightforward manner.? I have learned more
about antennas from using EZNEC than I have from any other source,
and I've been interested in antenna theory since my university
courses back in pre-history.
As far as I'm concerned, EZNEC is the gold standard for hobbyist
antenna modeling, and the Pro4/+ version (which requires an
additional module) rivals professional modeling software.
Dave? AB7E
On 12/6/2024 9:59 AM, W0LEV via
groups.io wrote:
toggle quoted message
Show quoted text
Yes,
EZNEC is an antenna design / evaluation application.?
Even
a 2-wire folded dipole has a nominal feed impedance of
300-ohms and is inappropriate to feed it with 50-ohm coax.?
Dave
- W?LEV
On Fri, Dec 6, 2024 at 4:24?PM
Chris Pannell via <chrispannell= [email protected]>
wrote:
Claudio,
Many thanks for the reply.? Please excuse my manners, I
should have apologized for not speaking Spanish before
launching into? English!! I speak a little Greek, but no
Spanish, unfortunately. Still, it is nothing that Google
Translate can't fix.?? In answer to your question, I am in
England, down in the South East, in Kent, 70 miles from
London.? I did live for 16 years in America though, I have
been back in England for 6 years. As I was in Florida, I
feel cold all the time here.? I'll put a few more details
about myself on my profile when I get round to it, but I
am primarily an optical scientist (semi- retired) , with
some background in electronics, including RF.
I see Dave-W0LEV replied saying he thought the
impedance presented at the feed was? 1.2 k Ohms, not 50
Ohms,? according to his EZNEC analysis. I have never used
this, I assume it's an RF antenna design package.? Any
comments on this?
Regards,
Chris Pannell
On 06/12/2024 02:26, W0LEV via wrote:
But
my EZNEC model shows 1.2 kΩ at the feed.? That would
require a 24:1 broadband transformer plus balun.? I
don't believe it is useful with 50-ohm coax at all!
I
sent out the EZNEC analysis earlier this afternoon.?
You should translate and read it!!
Dave
- W?LEV
On Fri, Dec 6, 2024 at
12:56?AM Claudio Alberto Pérez Celeiro via
<ecosanacion.interdimensional= [email protected]>
wrote:
Buenos días Chris.
Me alegro de tu correo.
Estamos hablando de una antena para
la? recepción de Onda Corta fundamentalmente.
También se puede utilizar para
transmisión, si uno es radioaficionado utilizando
el acoplador ó un Choque de Radio Frecuencia, o
bien, un Balun de 1:4 o 1:1 según donde esté
colocada la antena por el efecto capacitivo con
casas, muros, postes de luz, etc.
Volviendo a su efectividad para
recibir las se?ales de Júpiter, decir que por su
Ancho de Banda, es una antena que no es crítica en
su construcción, pués simplemente son dos brazos
con tres hilos que se juntan en sus extremos,
tanto en el centro y la bajada del Coaxial, como
en los laterales y sus ángulos de 45 grados. Estos
tampoco son críticos, siempre que se cumpla con la
medida final de cada brazo.?
Si la instalación es horizontal, es
conveniente el colocarla a un 60 % de su Longitud
de Onda, es decir, unos 4,40 mtrs de altura como
mínimo, ó a 8,80 como maximo.?
Es importante decir, que NO ES
importante que los brazos estén totalmente
horizontales con respecto al suelo. No afecta a la
recepción de la misma de una forma significativa.
En cuanto a como colocarla en el
terreno, es simplemente como bien dices, ponerla
de Este a Oeste, así siempre tendrás una magnífica
posición,? para muchas experiencias con? Júpiter y
otras experiencias en Radioastronom?a etc.?
Cualquier duda que tengas, estoy a
tu disposición.
Pregunta: Desde donde me escribes?
Gracias y un sincero saludo.
Claudio?
Madrid
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john sommer
Sabine Cremer
Carl Pajak Phone
Dave Typinski
salvador aguirre
