Earthchangers College

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Comment by Wm on August 22, 2021 at 1:57pm
Comment by Wm on June 11, 2021 at 8:04pm
International Space Station to be in Cross-Band Repeater Mode for Field Day

The Amateur Radio on the International Space Station (ARISS) cross-band repeater will be available for ARRL Field Day, June 26 - 27. Contacts will count toward Field Day bonus points as satellite contacts and Field Day contacts.

Field Day rules limit stations to one contact on any single-channel FM satellite. Note that contacts made during Field Day by ISS crew would only count for contact credit, but not for satellite bonus points. ISS cross-band repeater contacts are also valid AMSAT Field Day satellite contacts.

The ARISS cross-band repeater uplink is 145.990 MHz (67 Hz tone), with a downlink of 437.800 MHz.

ARISS suggests that those unfamiliar with the ISS repeater may want to practice with it prior to Field Day. ARISS had planned to switch modes to the Automatic Packet Reporting System (APRS) during the second week of June, but this won't happen until after the first ARISS school contact following ARRL Field Day. The ARISS ham station will be off-air during spacewalks on June 16 and June 20.

Comment by Wm on September 5, 2020 at 7:34am
Fri, Sep 4 at 4:43 PM
To all radio amateurs
As of Thursday night, no sunspots have appeared for the past 13
days.  I know we are all hoping for more sunspots, which I am sure
will return soon.  I have no special knowledge, but the trends for
this newly awakening solar cycle seem to favor it.  One event to
look forward to this month is the autumnal equinox on Tuesday,
September 22, which should favor worldwide HF propagation.
Average daily solar flux declined this reporting week (August 27
through September 2) from 70.4 to 69.6.
Geomagnetic indicators showed quite a bit more activity than they
have in some time now.  Average daily planetary A index rose from
5.1 to 13.1.  The most active day was August 31, when the planetary
A index reached 26.  The cause was a vigorous solar wind spewing
from holes in the solar corona.
Predicted solar flux is 70, forecast for every one of the next 45
days.  Predicted planetary A index is 5 on September 4 to 17, 8 on
September 18 and 19, 5 on September 20 to 22, then 8, 10 and 14 on
September 23 to 25, 10 on September 26 and 27, then 12 and 10 on
September 28 and 29, then 5 on September 30 through October 18.
This article says the solar minimum most likely occurred last
 geomagnetic activity forecast for the period September 4 to 29, 2020.
"Geomagnetic field will be
Quiet on:  September 5 to 8, 10 to 13, 16 and 17, 20 and 21
Quiet to unsettled on:  September 4, 9, 14, 29
Quiet to active on:  September 15, 18 and 19, 22 to 24, 26
Unsettled to active:  September 25, 27 and 28
Active to disturbed:  Not expected
Solar wind will intensify on:  September (4, 15, 19,) 22 and 23
Parenthesis means lower probability of activity enhancement."
OK1HH wrote to us about his river cruise:
"As a captain, I sailed on the M / Y 'Daisy' (LOA 8 meters, 0.4
tons) on the Czech rivers Elbe and Vltava on the route Melnik -
Zernoseky Lake, Usti, Melnik, Luzec, Melnik, a total of 217.4 km.
And it was a beautiful week!"
Thanks to K9LA for this link to a fascinating and informative RSGB
lecture about sporadic-e propagation:
An article about Europe's most powerful solar telescope:
Tamitha Skov has a new video:
I love Dr. Skov's enthusiasm: "Whamo!"  And also of course her
expertise, which she shares so generously.
For more information concerning radio propagation, see and the ARRL Technical Information
explanation of numbers used in this bulletin, see
An archive of past propagation bulletins is at
information and tutorials on propagation are at
Instructions for starting or ending email distribution of ARRL
bulletins are at
Sunspot numbers for August 27 through September 2, 2020 were 0, 0,
0, 0, 0, 0, and 0, with a mean of 0.  10.7 cm flux was 70, 70.1,
70.2, 70, 69.2, 69.5, and 68.3, with a mean of 69.6.  Estimated
planetary A indices were 8, 10, 14, 9, 26, 16, and 9, with a mean of
13.1.  Middle latitude A index was 7, 8, 14, 8, 19, 16, and 8, with
a mean of 11.4.
Comment by Wm on September 4, 2020 at 11:05am

ARRL News Letter as of Sept 3rd!

Comment by Wm on September 15, 2017 at 11:23am
Comment by Wm on January 21, 2017 at 8:52am

The radio's are really getting cheap now! Even local Police are buying these things, because they cover there Frequencies too! Stay away from the Walkie Talkies if you are in the hills and need to talk around to close to being Line of Sight Freq's. UHF Now if you want to keep you signal low profile then go for it! Other wise you want VHF! These will not do HF!

BAOFENG These things are made in China! You can get better prices if you look around. You will need the programing cable and software to set these things up difficult to do w/o.

Comment by Wm on April 30, 2016 at 3:30pm

Ubuntu Linux remastered for Amateur Radio users

Brought to you by: andystewart

Comment by Wm on April 29, 2016 at 9:47pm

Band Plan

A band  plan refers to a voluntary division of a band to avoid interference between incompatible modes.

Comment by Wm on February 12, 2016 at 12:18pm

The book Low profile amateur Radio is not available. So

has more books on Antenna's and are not gouging on the prices.

Comment by Wm on February 12, 2016 at 10:01am

A Killer Antenna!

Is a 33ft 3 1/2inches use a Sling shot to get fishing line into a tree about 40-45 ft off the ground use it to pull up a rope tied to the insulator with the wire tied to it, at the bottom of the wire use anther insulator and a rope to tie the rope to a short log so it will move up and down with the wind.

Next on the bottom insulator tie three more 33ft 3 1/2 inches of wire and keep them about 6ft off the ground and tie off w/insulators and rope.

Now with a 450OHM Latter line feed it to a Antenna Tuner! it will work all HF bands with the Tuner w/o tuner it will only work 40meter band!

You can find this in the "LOW PROFILE AMATEUR RADIO" Book ISBN-13978-0-87259-974-1


Always demand proof, proof is the elementary courtesy that is anyone’s due.  —Paul Valéry, "Monsieur Teste"

Is That Winged Object Really Planet X? Maybe Not!

Here's a NASA deconstruction image showing the central personnel area and three force shields:

See for the video it came from (40:23 etc).

Indonesia Plate NOT Collapsing -- The TruEarth Images offered by ZT as "proof" are 11 years old! 

Oh, Buoy! (Misinterpreted buoy charts)

Deconstructing Nancy Lieder and her Zetatalk



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