RSID: <<2022-04-07T23:31Z MFSK-32 @ 9265000+1500>>

Welcome to program 251 of Shortwave Radiogram.

I'm Kim Andrew Elliott in Arlington, Virginia USA.

Here is the lineup for today's program, in MFSK modes as noted:

  1:38 MFSK32: Program preview (now)
  2:45 MFSK32: Greek Defense Minister meets US diplomat (Greek)*
10:29 MFSK64: Solar cells that also work at night
12:50 MFSK64: This week's images*
28:44 MFSK32: Closing announcements

* with image(s)


 

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Full text:
https://www.mod.mil.gr/synantisi-yetha-nikolaoy-panagiotopoyloy-tin-yfypoyrgo-exoterikon-ton-ipa-armodia/

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Shortwave Radiogram now changes to MFSK64 ...


 

RSID: <<2022-04-07T23:40Z MFSK-64 @ 9265000+1500>>




This is Shortwave Radiogram in MFSK64

Please send your reception report to radiogram@verizon.net
 

From the American Institute of Physics:

Solar Cell Keeps Working Long After Sun Sets

April 5, 2022

About 750 million people in the world do not have access to
electricity at night. Solar cells provide power during the day,
but saving energy for later use requires substantial battery
storage.

In Applied Physics Letters, by AIP Publishing, researchers from
Stanford University constructed a photovoltaic cell that harvests
energy from the environment during the day and night, avoiding
the need for batteries altogether. The device makes use of the
heat leaking from Earth back into space - energy that is on the
same order of magnitude as incoming solar radiation.

At night, solar cells radiate and lose heat to the sky, reaching
temperatures a few degrees below the ambient air. The device
under development uses a thermoelectric module to generate
voltage and current from the temperature gradient between the
cell and the air. This process depends on the thermal design of
the system, which includes a hot side and a cold side.

"You want the thermoelectric to have very good contact with both
the cold side, which is the solar cell, and the hot side, which
is the ambient environment," said author Sid Assawaworrarit. "If
you don't have that, you're not going to get much power out of
it."

The team demonstrated power generation in their device during the
day, when it runs in reverse and contributes additional power to
the conventional solar cell, and at night.

The setup is inexpensive and, in principle, could be incorporated
within existing solar cells. It is also simple, so construction
in remote locations with limited resources is feasible.

"What we managed to do here is build the whole thing from
off-the-shelf components, have a very good thermal contact, and
the most expensive thing in the whole setup was the
thermoelectric itself," said author Zunaid Omair.

Using electricity at night for lighting requires a few watts of
power. The current device generates 50 milliwatts per square
meter, which means lighting would require about 20 square meters
of photovoltaic area.

"None of these components were specifically engineered for this
purpose," said author Shanhui Fan. "So, I think there's room for
improvement, in the sense that, if one really engineered each of
these components for our purpose, I think the performance could
be better."

The team aims to optimize the thermal insulation and
thermoelectric components of the device. They are exploring
engineering improvements to the solar cell itself to enhance the
radiative cooling performance without influencing its solar
energy harvesting capability.

https://publishing.aip.org/publications/latest-content/solar-cell-keeps-working-long-after-sun-sets/

This is Shortwave Radiogram in MFSK64

Please send your reception report to radiogram@verizon.net
 

This week's images ...

Our propagation indicator is hexagons ...

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South Korean Buddhists Carry lotus lanterns during a lighting
ceremony in Seoul to celebrate the upcoming birthday of Buddha on
May 8. https://bit.ly/3KgSBHG ...

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A walkway on the Greek island of Mykonos. https://etsy.me/3DNp6L4
...

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A field covered with poppies in full bloom near the Antelope
Valley California Poppy Reserve in Lancaster, California, March
30. https://bit.ly/3LPmiQb ...

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Crocuses in West Linton, Scotland. https://bbc.in/37ocP3J ...

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First bluebells of the year in the Washington DC area.
https://bit.ly/3LPq5gn ...

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A crossvine flower high in a tree in Myrtle Beach State Park,
South Carolina. https://bit.ly/3r7nTcy ...

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A ruby-crowned kinglet at Robert Moses State Park, Long Island,
New York. https://bit.ly/3uezVm3 ...

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Our painting of the week is "Better Days Ahead" (2021) by Billie
Rae Busby. https://bit.ly/3716482

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Shortwave Radiogram returns to MFSK32 ...

 

RSID: <<2022-04-072T23:58Z MFSK-32 @ 9265000+1500>>

This is Shortwave Radiogram in MFSK32 ...

 

Shortwave Radiogram is transmitted by:

WRMI, Radio Miami International, wrmi.net

and

WINB Shortwave, winb.com


Please send reception reports to radiogram@verizon.net

And visit http://swradiogram.net

Twitter: @SWRadiogram or twitter.com/swradiogram

I'm Kim Elliott. Please join us for the next Shortwave
Radiogram.

Carl Perkins was born April 9, 1932.

He died in 1998.
 

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bit.ly/3KcvCgP

Please report your decode to themightykbc@gmail.com


 

RSID: <<2022-04-10T01:48Z FELDHELL @ 5960000+1500>>

RSID: <<2022-04-10T01:48Z MFSK-64 @ 5960000+1500>>

Working QRP

Written especially for this broadcast. It is in MFSK64 @ 1500 Hz

In spite of doing this broadcast with around 100 kW or more, I have always been into working QRP, even since before being a ham.

Many hams don't understand what it is about. To me it is also about proportion. I have once owned a contest grade station with contest grade power for several years. But then I realised that it doesn't matter much how
high you set the bar for the pleasure you have. I know amateurs that work with Australia and New Zealand almost everyday. But that also comes with a cost.

I am pleased if I work 5000 km. Very pleased even.

But it is not only how high you set the bar. Working on a location that isn't especially suited for ham use, sometimes ad hoc, can be very entertaining as well. Putting up your antenna, or even being pedestrian mobile as
I mentioned last week or bicycle mobile.

Another thing that has always attracted me is the simplicity of the gear you can use for QRP. Especially when working CW.

I also want to be able to take my station with me, being able to use it spontaneously, so that when I realise I am at a suitable location, and I realise I would like to make some QSO's and I have the time for it, I can
easily do that. For that, everything should fit neatly into my backpack. But I would also like not to take the most expensive equipment with me. Otherwise I would mind too much when for example putting a bag of potatoes
or other groceries on top of it in my backpack. Equipment should also be quite modest in size.

Working QRP by amateurs has been reported in magazines as early as 1924. So it has been around for a long time as well.

Btw: I am not critisizing amateurs who work QRO. Not at all! But right now at this moment, working low power or even lower power is simply what I like most...
 

de k
 

RSID: <<2022-04-10T01:50Z MFSK-64 @ 5960000+1500>>

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RSID: <<2022-04-07T01:51Z MFSK-64 @ 5850000+1500>>

This Is A Music Show #160
7 April 2022

0200-0300UTC Thursday on 5850 kHz

via WRMI, Okeechobee USA

***ALSO***

TIAnExpressMS w/ Radio Northern Europe International
via Channel 292 in Germany, mainly on 6070 kHz.

Broadcast various dates/times/freqs. Check the schedule here:

https://www.channel292.de/
https://rnei.org/

----------------------------------------

PLAYLIST

Esquivel - Dark Eyes

-----

3's A Crowd - I Don't Wanna Drive You Away
Sebastian - Come On Over My Place
Alice Cooper - Reflected

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Paul Humphrey And His Cool-Aid Chemists - Detroit
Sakhile - Sakhile
The Temptations - I Can't Get Next To You

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Republika - Gadające Głowy
Gipsy Love - Moon Song
Norma Tenaga - I'm The Sky

[Tanega]

-----

Nicky Thomas - Have A Little Faith
Rick Frater And His Blue Grass - I Don't Know How To Love Part 1

-----

Toni Basil - Space Girls

-----

THIS DATA w/ Bert Kaempfert - Lonely Nightingale

-----

Linda Scott - Three Guesses

----------------------------------------


TIAMS Website:

https://thisisamusicshow.com

Go here for show archives + official shop!

-----

Please send reception reports/comments:

thisisamusicshow@gmail.com

Follow TIAMS on Twitter:

www.twitter.com/ThisIsAMusicSho/

------

Thanks for listening!

--YOUR HOST--


EOM

 

RSID: <<2022-04-07T01:53Z MFSK-64 @ 5850000+1500>>

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