Date   

Re: NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Dennis W6BFK
 
Edited

As Doug has explained,  we will be starting on 7.265 LSB +/- Saturday at 1400 local time, and KM4LKC/KO4ACY will be running the Frq.  Any traffic not directed to KM4LKC/KO4ACY should QSY to another frq so this channel remains clear for the exercise.  The plan is to be flexible and Band, Frequency, and Mode changes will be announced on the frequency, the zoom meeting, and via back channel for the exercise stations.  So stay tuned via Zoom as we work the bands and modes on this exercise.

73
de W6BFK


Re: NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Mike W4MMU <mikelleen@...>
 

Something else that can work for NVIS is a G5RV mounted as an inverted V 


Re: NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Doug KM4LKC
 

Here we go!

Chuck, KO4ACY, had another great idea.  Rather than trying to create a schedule for the antenna test, Chuck suggested that we run a zoom meeting.  This will allow members to pop in and see what bands and modes we are working.
You will find the ZOOM invitation below.

Our plan is to start operations at 2:00 pm on Saturday, August 28th.  We will start with voice somewhere around 7.265 LSB.  Please note we may move depending on frequency availability, but we should be somewhere in the vicinity.
Also, note - just because you do not hear us - it does not mean that we are not working the frequency.  Please keep the operating frequency clear by moving 10kHz away either up or down.

We expect to try a number of bands and modes.  This runs 80 - 20 and we may give 160 a shot if we can load up the antennas.  We expect to run voice, JS8 Call, and CW.

We also plan to operate again on Sunday morning wrapping up operations around 10:00 am or so.

Be sure to listen for us.  We hope you will try to make contact with any of the operating stations - Charlotte County, Ft Pierce, or Bonita Springs.
We look forward to hearing you on the air and seeing you on ZOOM.


CARS WX4E is inviting you to a scheduled Zoom meeting.
 
Topic: NVIS Antenna Experiment
Time: Aug 28, 2021 02:00 PM Eastern Time (US and Canada)
 
Join Zoom Meeting
 
Meeting ID: 891 2895 5523
Passcode: 461738

One tap mobile
+13017158592,,89128955523#,,,,*461738# US (Washington DC)
+13126266799,,89128955523#,,,,*461738# US (Chicago)
 
Dial by your location
        +1 301 715 8592 US (Washington DC)
        +1 312 626 6799 US (Chicago)
        +1 646 558 8656 US (New York)
        +1 253 215 8782 US (Tacoma)
        +1 346 248 7799 US (Houston)
        +1 669 900 9128 US (San Jose)
Meeting ID: 891 2895 5523
Passcode: 461738
Find your local number: https://us02web.zoom.us/u/k21TjzwO4
 


Parker Solar Probe Mission - Nasa

Chad-W4SWI
 

Parker Solar Probe - Mission News | NASA Site 

As the Parker Solar Probe ventures closer to the sun, we are learning new things about our home star.

In a new study, physicists led by the University of Iowa report the first definitive measurements of the sun’s electric field, and how the electric field interacts with the solar wind, the fast-flowing current of charged particles that can affect activities on Earth, from satellites to telecommunications.

The physicists calculated the distribution of electrons within the sun’s electric field, a feat made possible by the fact that the Parker Solar Probe jetted within 0.1 astronomical units (AU), or a mere 9 million miles, from the sun—closer than any spacecraft has approached. From the electrons’ distribution, the physicists were able to discern the size, breadth, and scope of the sun’s electric field more clearly than had been done before.

Jasper Halekas
Jasper Halekas

“The key point I would make is you can’t make these measurements far away from the sun. You can only make them when you get close,” says Jasper Halekas, associate professor in the Department of Physics and Astronomy at Iowa and the study’s corresponding author. “It’s like trying to understand a waterfall by looking at the river a mile downstream. The measurements we made at 0.1 AU, we’re actually in the waterfall. The solar wind is still accelerating at that point. It’s really just an awesome environment to be in.”

The sun’s electric field arises from the interaction of protons and electrons generated when hydrogen atoms are stripped apart in the intense heat generated by fusion deep within the sun. In this environment, electrons, with masses 1,800 times less than that of protons, are blown outward, less constrained by gravity than their weightier proton siblings. But the protons, with their positive charge, exert some control, reining in some electrons due to the familiar attraction forces of oppositely charged particles.

“Electrons are trying to escape, but protons are trying to pull them back. And that is the electric field,” says Halekas, a co-investigator for the Solar Wind Electrons, Alphas, and Protons instrument aboard the Parker Solar Probe, the NASA-led mission that launched in August 2018. “If there were no electric field, all the electrons would rush away and be gone. But the electric field keeps it all together as one homogenous flow.”

Now, imagine the sun’s electric field as an immense bowl and the electrons as marbles rolling up the sides at differing speeds. Some of the electrons, or marbles in this metaphor, are zippy enough to cross over the lip of the bowl, while others don’t accelerate enough and eventually roll back toward the bowl’s base.

diagram of the sun's electric field
University of Iowa physicists have gained new insights about the sun’s electric field. The researchers measured electrons streaming from the sun, a main constituent of the solar wind, to determine the boundary in energy between electrons that escape the sun’s clutches and those that don’t. Image courtesy of Jasper Halekas Lab.

“We are measuring the ones that come back and not the ones that don’t come back,” Halekas says. “There’s basically a boundary in energy there between the ones that escape the bowl and the ones that don’t, which can be measured. Since we’re close enough to the sun, we can make accurate measurements of electrons’ distribution before collisions occur further out that distort the boundary and obscure the imprint of the electric field.”

From those measurements the physicists can learn more about the solar wind, the million-mile-per-hour jet of plasma from the sun that washes over the Earth and other planets in the solar system. What they found is the sun’s electric field exerts some influence over the solar wind, but less than had been thought.

“We can now put a number on how much of the acceleration is provided by the sun’s electric field,” Halekas says. “It looks like it’s a small part of the total. It’s not the main thing that gives the solar wind its kick. That then points to other mechanisms that might be giving the solar wind most of its kick.”

The paper, “The sunward electron deficit: A telltale sign of the sun’s electric potential,” was published online July 14 in The Astrophysical Journal.

Contributing authors include Laura Bercic, from University College London; Phyllis Whittlesey, Davin Larson, Marc Pulupa, and Stuart Bale, from the University of California, Berkeley; Matthieu Berthomier, from the University of Paris-Saclay; Justin Kasper, of the University of Michigan and the Smithsonian Astrophysical Observatory; Anthony Case and Michael Stevens, of the Smithsonian Astrophysical Observatory; and Robert MacDowall, of NASA Goddard Space Flight Center.

NASA funded the research.

--
W4SWI- Chad 73's HVI
Link to my QRZ Page.
Former Callsign: KO4IEW


Call Sign Series for Afghanistan Hams

Dennis W6BFK
 

For anyone who might be interesting in making contact with fellow Hams in Afghanistan,  the callsign prefixes are as follows:

T6A-T6Z
YAA-YAZ

73
de W6BFK


locked Re: Do you want to learn winlink express global radio email? #digitaldata #emcomm

Doug KM4LKC
 

Here is an article from the ARRL "On The Air" explaining "Winlink - Amateur Radio's Email Network"
See the attached pdf.


Re: PRESTO ALERT

Doug KM4LKC
 

Thanks Jon.  I sure hope it's gone by Saturday.


PRESTO ALERT

Jon W1JP
 

Presto alert— CME due to hit us on Thursday. Expect some RF loss…

Skål, 
Jon
W1JP


Begin forwarded message:

From: Solar Influences Data analysis Center <sidc@...>
Date: August 24, 2021 at 16:24:32 EDT
To: w1jp@...
Subject: PRESTO ALERT
Reply-To: no-reply-sidc@...

:Issued: 2021 Aug 24 2021 UTC
:Product: documentation at http://www.sidc.be/products/presto
#--------------------------------------------------------------------#
# FAST WARNING 'PRESTO' MESSAGE  from the SIDC (RWC-Belgium)         #
#--------------------------------------------------------------------#
In the first hours of August 23rd, the eruption of a large filament situated close to the extension of the northern polar coronal hole (down to 25 degrees), was observed. The filament eruption was associated with the faint and slow partial halo CME (angular width of about 180 degrees and velocity about 450 km/s). The CME was first observed in the SOHO LASCO C2 field of view at about 06:00 UT. We expect arrival of the CME at Earth in the afternoon of August 26.
#--------------------------------------------------------------------#
# Solar Influences Data analysis Center - RWC Belgium                #
# Royal Observatory of Belgium                                       #
#                                                                    #
# Website         http://www.sidc.be.                                #
# E-mail          sidc-support@...                                #
# To unsubscribe  http://www.sidc.be/registration/unsub.php          #
#                                                                    #
# Legal notices:                                                     #
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# - Use and processing of your personal information:                 #
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#--------------------------------------------------------------------#


Re: Help us design a "GO-KIT" #emcomm #makeitradio

Doug KM4LKC
 

We are still looking for "GO-Box" ideas.  Please share your thoughts.


Re: NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Doug KM4LKC
 

More details will follow on Thursday including frequencies, operating times, and modes.


Re: NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Chuck W3CHH
 

Have you decided on the frequencies yet? 


NVIS Antenna Testing on August 28-29 #operatingevents #emcomm #makeitradio

Doug KM4LKC
 

Can you hear me now!

Join us for our NVIS Antenna experiment on Saturday, August 28th, and possibly Sunday, August 29th.


We plan to have a station located in Port Charlotte.  And we plan to have a system in Ft Pierce, FL, which is about 100 miles from Port Charlotte.  We also plan to have a system located in the Bonita Springs area located about 60 miles from Port Charlotte.  The Port Charlotte location plans to use an end-fed long wire antenna,  The other two stations plan to deploy a design similar to the military AS2259/GR antenna.

You can find a pdf attached to this post from DX Engineering explaining the antenna system.  The NVIS antenna described is based on the proven information from the military AS2259/GR antenna. It will provide excellent short-range communications and is easy to set up for an emergency or temporary communications.
 It's a dual-band inverted "V" at a height of 15 feet.
 The area required (footprint) is approximately 45 feet by 45 feet.
 The mast support used is fiberglass to avoid any signal coupling from the low antenna wires. The fiberglass sections are widely available on the military surplus market, or you can make your own support using PVC tube sections.
 The 4 wires used for the antenna elements are also used with rope to provide the support or guying for the 15-foot mast.
 Your tuner is connected to the antenna Center "T" using 100 feet of RG-8X coaxial cable. A tuner is required to match the antenna to your transmitter.

Join us for some playing radio in the field.

More details will follow on Thursday including frequencies, operating times, and modes.
--

Doug KM4LKC
Having fun promoting amateur radio technology


Re: IC-7300 software upgrade 7/2/2021

Howard Kunkel
 

Thank you Dennis,
I will have to check it out.

On Mon, Aug 23, 2021, 10:27 AM Dennis W6BFK <dennis@...> wrote:
OK,  I will have to give it a look.

I stumbled on a new setting strategy for the 7300 that would also apply to other rigs that use SD cards.

Since we use our rigs for a number of different modes, the strategy is to save a settings file to the SD card for each mode.

For example I have the following setting files on my SD card:
Digital Modes  (FT8, JS8)
Winlink
CW
Phone

So when I change modes,  I just load up the setting file from the SD card.  When I make a setting improvement, I save it out as a replacement.

It's keeps me from having to remember the different rig settings for the various modes.

73

Dennis


Event: NVIS Antenna Test - 08/28/2021 #cal-reminder

main@CARS-FL.groups.io Calendar <noreply@...>
 

Reminder: NVIS Antenna Test

When:
08/28/2021 2:00pm to
08/29/2021 10:00am
(UTC-04:00) America/New York

Where:
Within 120 miles of Charlotte County Florida

Organizer: Charlotte Amateur Radio Society info@...

View Event

Description:


Re: IC-7300 software upgrade 7/2/2021

Dennis W6BFK
 

OK,  I will have to give it a look.

I stumbled on a new setting strategy for the 7300 that would also apply to other rigs that use SD cards.

Since we use our rigs for a number of different modes, the strategy is to save a settings file to the SD card for each mode.

For example I have the following setting files on my SD card:
Digital Modes  (FT8, JS8)
Winlink
CW
Phone

So when I change modes,  I just load up the setting file from the SD card.  When I make a setting improvement, I save it out as a replacement.

It's keeps me from having to remember the different rig settings for the various modes.

73

Dennis


Re: IC-7300 software upgrade 7/2/2021

David NC4CC
 

I did really get turned on by the changes.

 

Changes from Version 1.40

·         - Added the set item to detect the Microphone PTT operation during transmission other than the Microphone PTT operation. 

·         - When in the Center mode of the Spectrum scope screen, the REF level setting does not reflect the scope waveform during transmission.

·         - This firmware update version 1.41 has been improved, so it will not reset settings and memories.

·         If the firmware is updated from version 1.40 or earlier, the settings and memories are not reset. 

·         However, if the firmware is reverted to 1.41 from a later version (after 1.41), the settings and memories may be reset.

 

 

From: main@CARS-FL.groups.io [mailto:main@CARS-FL.groups.io] On Behalf Of Dennis W6BFK
Sent: Monday, August 23, 2021 9:53 AM
To: David <david@...>; main@CARS-FL.groups.io
Subject: Re: [CARS-FL] IC-7300 software upgrade 7/2/2021

 

Hi Dave,

Any new features or improvements in the update that would make it worth while?

73

de W6BFK


Re: IC-7300 software upgrade 7/2/2021

Dennis W6BFK
 

Hi Dave,

Any new features or improvements in the update that would make it worth while?

73

de W6BFK


Re: Winlink with VARA HF

David Weinstein K3FHP
 

Speeds can vary greatly with VARA(no pun intended) and are related to both S/N and length of message.   Longer messages as I have read can achieve greater throughput speeds.  S/N in the right half get much better throughput.  It negotiates for a speed for best reliability.  Remember, speeds are not only rates of bits but # of carriers as well.  Example:


Re: Winlink with VARA HF

Doug KM4LKC
 

I sent and received a couple of messages on 40 meters today using the paid version of VARA HF (4.4.5)
While speeds varied some throughout - the average appeared to be about 1450 bpm.  Sometimes over 2300 sometimes around 700, but mostly in the 1450 range.


Re: IC-7300 software upgrade 7/2/2021

Duwain W8JJV
 

Thanks Dave for the notice!

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