www.rhci-online.net/radiogram/radiogram.htm

 


 

 

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                                                                    http://voaradiogram.net/

 

 

 

 

RSID: <<2013-11-30T16:01Z MFSK-16 @ 17860000+1500>>

 

 

<STX>

 

 

Welcome to program 35 of VOA Radiogram from the Voice of America.

 

I'm Kim Andrew Elliott in Washington.

 

Here is the lineup for today's program:

 

 1:37  MFSK16: Program preview (now, 3:01)

 4:43  MFSK32: Slant test with 4 images (5:18)

10:03  MFSK32: Introduction to audio harmonic experiments (2:32)

12:33  MFSK64 1500Hz/1000Hz: Philippines radio (3:56)

16:27  MFSK64 1000Hz: W7VOA image (1:55)

18:24  MFSK32: Email address and intro to MFSK64L tests (:44)

19:08  MFSK64L 1500Hz/1000Hz: Ivanpah solar power station (5:30)

24:39  MFSK32: Image of Ivanpah facility (2:37)

27:13  MFSK32: Closing announcements (:32)

27:46  MFSK32: VOA Radiogram logo (:36)

 

Please send reception reports to radiogram@voanews.com

 

And visit voaradiogram.net

 

Twitter: @VOARadiogram

 

 

VOA Radiogram changes to MFSK32...

 

<EOT>

 

 

 

 

RSID: <<2013-11-30T16:04Z MFSK-32 @ 17860000+1500>>

 

 

<STX>

 

 

 

In the previous program of VOA Radiogram, all listeners received

badly slanted MFSK images. This was because of a

yet-to-be-determined problem on the transmitting side.

 

Merkouris Gogos in Greece found the solution by using the Fldigi

setting that allows sampling rate corrections. I passed this

information on to VOA Radiogram listeners in an e-mail, and by

the end of the weekend, many of you were decoding unslanted

images.

 

Will the MFSK images be slanted this weekend? Let's begin the

program with a slant test.

 

First, in Fldigi, open this box: Configure > Sound Card >

Settings. Under Corrections, the RX ppm should be set to 0 (zero)

or whatever setting you use normally.

 

We will transmit a vertical blue line three times for a total of

2:15.

 

If the line appears vertical, no adjustments are necessary,

although you can experiment while the images are sent.

 

If the top of the line slants to the right, try an RX ppm of

-500, and click Save. Make futher adjustments as necessary.

 

If the top of the line slants to the left, try an RX ppm of 500

(+) and click Save. Make further adjustments as necessary

 

OK, let's see what happens. (This has never been attempted before

in shortwave broadcasting!) ...

 

<EOT>

 

 

 

 

Sending Pic:61x195C;

Sending Pic:61x195C;

Sending Pic:61x195C;

1st run

0 ppm

2nd run

0 ppm

3rd run

0 ppm

-50 ppm

-50 ppm

-50 ppm

 

 

<EOT>

 

 

 

<STX>

 

Next on VOA Radiogram, a QR code. If there is no slant, it will

be square in shape, and all the lines should be either vertical

or horizontal...

 

<EOT>

 

 

 

<STX>

 

Sending Pic:200x200;

<EOT>

 

 

 

 

 

 

<STX>

Roger:
Audio harmonics I could only see directly in the SDR software-radio waterfall-window. These were at least 30 dB below the respective main signals.  The AF-harmonics were so absolutely no problem

 

 

If you record VOA Radiogram using the Audacity software, slant

can be eliminated by using Effect > Change speed. A change of

-1000 ppm in Fldigi equals -0.1% in this Audacity setting.

 

+-+-+-+-+-+-+-+-+-+-+-+-+-+

|V|O|A| |R|A|D|I|O|G|R|A|M|

+-+-+-+-+-+-+-+-+-+-+-+-+-+

 

On VOA Radiogram, our experiments continue, but this time the

experiments will involve text rather than images.

 

Many of you have noticed audio harmonics of the digital text

modes. For example, the trace of MFSK32 centered on 1500 Hz is

from about 1260 to 1720 Hz. The second harmonic will be 2520 to

3440 Hz, with the lower half of that visible at the right side of

the Fldigi waterfall.

 

Today's experiment will try to determine if decode of the digital

text modes is impeded if the second harmonic overlaps with the

fundamental.

 

MFSK64 on VOA Radiogram is typically centered on 1500 Hz. As

such, the fundamental is from about 1000 Hz to 2000 Hz, with the

second harmonic from 2000 Hz to 4000 Hz. Hence, no overlap. But

if the MFSK64 center frequency is moved to 1000 Hz, the

fundamental of the MFSK64 is from 500 to 1500 Hz, with the second

harmonic 1000 to 3000 Hz. Now we have overlap.

 

Next on VOA Radiogram, a VOA News story in MFSK64 centered on

1500 Hz. After that, the same VOA News story in MFSK64, centered

on 1000 Hz, resulting in an overlapping second harmonic. Will

the overlap affect the decode of the MFSK64 text?  Stay tuned.

 

VOA Radiogram now changes to MFSK64 centered on 1500 Hz...

 

 

 

 

 

 

 

RSID: <<2013-11-30T16:12Z MFSK-64 @ 17860000+1500>>

 

 

<STX>

 

RSID: <<2013-11-30T16:16Z MFSK-64 @ 17860000+1000>>

 

 

<STX>

 

This is VOA Radiogram in MFSK64 centered on 1500 Hz...

 

 

Relief Radio Station Signals Dire State of Communications in

Tacloban, Philippines

 

Steve Herman W7VOA

November 23, 2013

 

TACLOBAN, PHILIPPINES - All of Tacloban's 15 radio stations were

knocked off the air when Typhoon Haiyan devastated the Philippine

city of 220,000 people. A response within 72 hours by volunteers

managed to get an emergency station on the air - the only local

mass means for the survivors there to get instant, reliable

information.

 

"It is now 10:07. This is 98.7 FM, First Response Radio

broadcasting live in Tacloban city." The voice of Magnolia

Yrasuegui is filling a void. Around the clock, live and on tape,

she and others are heard across the destroyed city informing

residents on how and where to get help.

 

The portable station, part of an international non-profit network

of radio technicians, is contained in a couple of suitcases that

were stored in Manila.

 

An initial small 50-watt transmitter is being replaced by a more

powerful 600-watt unit.

 

Even the weaker signal, though, could be heard for kilometers

emanating from a small antenna erected on the roof of the damaged

city hall.

 

Survivors are seeking accurate information about the fate of

family members and their city, according to Yrasuegui. "Rumors

have been flying out and they do not know anything about what

happened to them, if their relatives are still there. So

communication also is aid."

 

With no electricity service in the city and batteries a scarce

commodity, volunteers from the station have distributed hundreds

of solar and crank-up radios to people in evacuation centers.

 

They get to hear from in-studio guests such as Dr. Joji Tomioka

of Japan's medical team for disaster relief, which is now

treating patients in Tacloban. 

 

The five volunteers staffing First Response Radio say they will

remain on the air until this city can recover to the point that

at least one of its radio stations can resume broadcasting.

 

http://www.voanews.com/content/relief-radio-station-signals-dire-

state-of-communications-in-tacloban-philippines/1796148.html

 

 

Now the same VOA News story in MFSK, with the center frequency

shifted to 1000 Hz.

 

VOA Radiogram continues in MFSK64 but shifts the center audio

frequency to 1000 Hz...

 

<EOT>

This is VOA Radiogram in MFSK64 centered on 1000 Hz...

 

 

Relief Radio Station Signals Dire State of Communications in

Tacloban, Philippines

 

Steve Herman W7VOA

November 23, 2013

 

TACLOBAN, PHILIPPINES - All of Tacloban's 15 radio stations were

knocked off the air when Typhoon Haiyan devastated the Philippine

city of 220,000 people. A response within 72 hours by volunteers

managed to get an emergency station on the air - the only local

mass means for the survivors there to get instant, reliable

information.

 

"It is now 10:07. This is 98.7 FM, First Response Radio

broadcasting live in Tacloban city." The voice of Magnolia

Yrasuegui is filling a void. Around the clock, live and on tape,

she and others are heard across the destroyed city informing

residents on how and where to get help.

 

The portable station, part of an international non-profit network

of radio technicians, is contained in a couple of suitcases that

were stored in Manila.

 

An initial small 50-watt transmitter is being replaced by a more

powerful 600-watt unit.

 

Even the weaker signal, though, could be heard for kilometers

emanating from a small antenna erected on the roof of the damaged

city hall.

 

Survivors are seeking accurate information about the fate of

family members and their city, according to Yrasuegui. "Rumors

have been flying out and they do not know anything about what

happened to them, if their relatives are still there. So

communication also is aid."

 

With no electricity service in the city and batteries a scarce

commodity, volunteers from the station have distributed hundreds

of solar and crank-up radios to people in evacuation centers.

 

They get to hear from in-studio guests such as Dr. Joji Tomioka

of Japan's medical team for disaster relief, which is now

treating patients in Tacloban. 

 

The five volunteers staffing First Response Radio say they will

remain on the air until this city can recover to the point that

at least one of its radio stations can resume broadcasting.

 

http://www.voanews.com/content/relief-radio-station-signals-dire-

state-of-communications-in-tacloban-philippines/1796148.html

 

 

 

 

 

Next an image VOA correspondent Steve Herman, W7VOA, reporting

from the Philippines...

 

<EOT>

 

 

 

 

 

<STX>

 

Sending Pic:180x184C;

 

 

<EOT>

 

 

 

 

 

 

<STX>

 

 

VOA Radiogram now changes to MFSK32 centered on 1500 Hz...

 

<EOT>

 

 

 

 

 

 

RSID: <<2013-11-30T16:16Z MFSK-32 @ 17860000+1500>>

 

<STX>

 

 

This is VOA Radiogram in MFSK32...

 

 

Please send reception reports to radiogram@voanews.com

 

And visit voaradiogram.net

 

Twitter: @VOARadiogram

 

 

We compared MFSK64 at center frequencies of 1500 and 1000 Hz. Now

let's do the same for the new long-interleave mode MFSK64L.

 

VOA Radiogram now changes to MFSK64L centered on 1500 Hz...

 

<EOT>

 

 

 

RSID: <<2013-11-30T16:19Z MFSK-64L @ 17860000+1500>>

 

<STX>

 

 

RSID: <<2013-11-30T16:21Z MFSK-64L @ 17860000+1000>>

 

<STX>

 

 

This is VOA Radiogram in MFSK64L centered on 1500 Hz...

 

 

World's Largest Solar Plant to Go Online in California

 

Zlatica Hoke

November 15, 2013

 

WASHINGTON The world's largest solar thermal plant is set to go

online in California by the end of the year. While wind and

sun-generated energy are generally considered clean, unlike

coal-generated energy, environmentalists now worry that

large-scale solar development could harm fragile desert

ecosystems.

 

Ivanpah is a field of mirrors, shimmering like a mirage in

California's Mojave desert, about 60 kilometers southwest of Las

Vegas. Joe Desmond is a senior official at BrightSource Energy,

the company that's building the plant.

 

"This is actually one of the highest concentrations of sunlight

in the world, out here in Ivanpah," explained Desmond.

 

The plant will deploy 170,000 heliostat mirrors to focus solar

energy on boilers located on top of three power towers. The steam

generated in these boilers will drive turbines to produce energy.

 

Desmond said the steam can reach temperatures of more than 260

degrees Celsius.

 

"We can store the sun's thermal energy in the form of molten

salt, so we can produce electricity even when the sun goes down.

There is a lot of interest in concentrating solar power around

the globe in environments where you have lots of sun, such as

China, South Africa, the Middle East, North Africa," explained

Desmond.

 

Environmentalists generally support the idea of solar plants, but

many want habitats like the one where Ivanpah is being built to

stay intact.

 

"Even though the desert seems big, when you start cutting it up,

it can really affect how the species and the animals and the

plants are able to survive in the long run," said Lisa Belenky,

senior attorney for the Center for Biological Diversity, a

private advocacy group with offices in several U.S. states.

 

Belenky said some environmentalists are worried about the effect

of the Google-backed Ivanpah Solar Project on the sensitive plant

and animal life in this part of Mojave. BrightSource Energy has

already spent more than $50 million to relocate the endangered

desert tortoise, which lives in the area, but Belenky feels this

is not the right solution.

 

"We should be reusing areas that have already been disturbed

[like] old mining sites, for example... either on homes, on

businesses, you can.... [place them] on parking lots," said

Belenky, offering alternative locations for solar power

collection.

 

Brightsource has already pre-sold energy to parts of southern

California. It plans to start running the plant at the end of the

year.

 

http://www.voanews.com/content/world-largest-solar-plant-online-c

alifornia/1790639.html

 

 

VOA Radiogram now continues with MFSK64L, but changes the center

audio frequency to 1000 Hz...

.

.

.

.

<EOT>

This is VOA Radiogram in MFSK64L centered on 1000 Hz...

 

 

World's Largest Solar Plant to Go Online in California

 

Zlatica Hoke

November 15, 2013

 

WASHINGTON The world's largest solar thermal plant is set to go

online in California by the end of the year. While wind and

sun-generated energy are generally considered clean, unlike

coal-generated energy, environmentalists now worry that

large-scale solar development could harm fragile desert

ecosystems.

 

Ivanpah is a field of mirrors, shimmering like a mirage in

California's Mojave desert, about 60 kilometers southwest of Las

Vegas. Joe Desmond is a senior official at BrightSource Energy,

the company that's building the plant.

 

"This is actually one of the highest concentrations of sunlight

in the world, out here in Ivanpah," explained Desmond.

 

The plant will deploy 170,000 heliostat mirrors to focus solar

energy on boilers located on top of three power towers. The steam

generated in these boilers will drive turbines to produce energy.

 

Desmond said the steam can reach temperatures of more than 260

degrees Celsius.

 

"We can store the sun's thermal energy in the form of molten

salt, so we can produce electricity even when the sun goes down.

There is a lot of interest in concentrating solar power around

the globe in environments where you have lots of sun, such as

China, South Africa, the Middle East, North Africa," explained

Desmond.

 

Environmentalists generally support the idea of solar plants, but

many want habitats like the one where Ivanpah is being built to

stay intact.

 

"Even though the desert seems big, when you start cutting it up,

it can really affect how the species and the animals and the

plants are able to survive in the long run," said Lisa Belenky,

senior attorney for the Center for Biological Diversity, a

private advocacy group with offices in several U.S. states.

 

Belenky said some environmentalists are worried about the effect

of the Google-backed Ivanpah Solar Project on the sensitive plant

and animal life in this part of Mojave. BrightSource Energy has

already spent more than $50 million to relocate the endangered

desert tortoise, which lives in the area, but Belenky feels this

is not the right solution.

 

"We should be reusing areas that have already been disturbed

[like] old mining sites, for example... either on homes, on

businesses, you can.... [place them] on parking lots," said

Belenky, offering alternative locations for solar power

collection.

 

Brightsource has already pre-sold energy to parts of southern

California. It plans to start running the plant at the end of the

year.

 

http://www.voanews.com/content/world-largest-solar-plant-online-c

alifornia/1790639.html

 

 

VOA Radiogram now changes to MFSK32 centered on 1500 Hz...

.

.

 

 

 

<EOT>

 

 

 

 

 

 

RSID: <<2013-11-30T16:24Z MFSK-32 @ 17860000+1500>>

 

 

<STX>

 

This is VOA Radiogram in MFSK32 centered on 1500Hz...

 

 

An image follows, showing the solar receiver tower, with mirrors

in background, at the Ivanpah solar energy plant...

 

<EOT>

 

 

 

 

 

RSID: <<2013-11-30T16:25Z MFSK-32 @ 17860000+1500>>

 

<STX>

Sending Pic:178x223C;

 

Internet:

 

 

 

 

<STX>

 

 

 

Please send reception reports to radiogram@voanews.com

 

And visit voaradiogram.net

 

Twitter: @VOARadiogram

 

Thanks to colleagues at the Edward R. Murrow shortwave transmitting station in North Carolina.

 

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

 

This is VOA, the Voice of America.

 

<EOT>

 

 

 

<STX>

 

Sending Pic:316x28C;

 

 

<EOT>

 

 

 

 

 

RSID: <<2013-11-30T16:29Z OL 64-2K @ 17860000+1500>>

 

Thank you for decoding the modes on VOA Radiogram.

 

 

 

 

 


www.rhci-online.net/radiogram/radiogram.htm

 

 QTH:

 D-06193 Petersberg (Germany/Germania)

 Ant.:

 Dipol for 40m-Band

 RX:

 ICOM IC-R75 + IF-mixer

 Software IF:

 con STUDIO1 - Software italiano per SDR in  LSB

 Software AF:

 Fldigi 3.21.77AB  +   flmsg 1.1.33

 OS:

 German XP-SP3 with support for asian languages

 PC:               

 MEDION Titanium 8008  (since 2003)   [ P4  -  2,6 GHz]


 

 

 

 

Radio Nostalgie   -   Images received via EASYPAL/DSSTV on 14233 kHz/USB and 3733 kHz LSB in the last days.

 

 

   

   

   

Also looks kinda old .....