We had an excellent response to the VOA Radiogram
of 15 and 16 June. Thanks for your reports and attachments. I am still
analyzing the audio and screenshots you have sent. It's all fascinating.
As I expected, many of you lost the ability to
decode MFSK16 when it was reduced to -12 dB under the noise that was
mixed with it. I was surprised, however, at the number of listeners who
copied all of the MFSK16 at that level. Many of
these listeners are in Europe.
For the weekend of 21 and 22 June, the number of
reports I receive might be reduced somewhat by the amateur radio Field
Day exercise here in North America. I hope you can take a break from
Field Day and tune in to one of the VOA Radiogram
airplays.
This weekend's main experiment will involve the
EasyPal digital image system. We will use a more robust 4-QAM setting,
rather than the 16-QAM setting of previous weeks. As a result, the
EasyPal image transmission will occupy seven minutes
of the next broadcast, rather than the usual 2:40. The reward for this
long EasyPal transmission might be a successful decode of the EasyPal
image if it has not succeeded before. Because it does require seven
minutes of a 29-minute program, we will not transmit
4-QAM EasyPal images on a regular basis. Download EasyPal from
vk4aes.com.
Here is the lineup for VOA Radiogram, program 14, 22-23 June 2013:
2:23 MFSK16: Program preview
3:17 MFSK32: VOA News story about Google balloons
2:13 MFSK32: Image of a Google balloon
:22 MFSK32: Introduction to Flmsg
3:41 MFSK32 in Flmsg* format: VOA News re Chinese computer
:14 MFSK32: Intro to MFSK64
2:53 MFSK64: VOA News story about new astronauts
1:07 MFSK32: Image of new astronauts
:53 MFSK32: Introduction to EasyPal
7:03 EasyPal image of the week
1:08 MFSK16: Closing announcements
:18 Surprise mode of the week
*Use Flmsg with Fldigi, both available from w1hkj.com.
During VOA Radiogram during the weekend of 8-9
June, our "interference" experiment involved the song "I Remember You"
by Slim Whitman. We selected Mr. Whitman's song because his amazing
vocal range provided a good test for the MFSK modes.
This week came the sad news that Slim Whitman died Wednesday, age 90.
Kim
Kim Andrew Elliott
Producer and Presenter
VOA Radiogram
VOA Radiogram transmission schedule
(all days and times UTC):
Sat 1600-1630 17860 kHz
Sun 0230-0300 5745 kHz
Sun 1300-1330 6095 kHz
Sun 1930-2000 15670 kHz
All via the Edward R. Murrow transmitting station in North Carolina.
VOA Radiogram
radiogram@voanews.com
Twitter: @voaradiogram
