Date   

new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website.
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International also uses digital modes during its broadcasts. The August schedule hasn't been announced as of this writing.  See https://rnei.org/ for more information.
   
Here's hoping for good propagation 


new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 19.  
See https://rnei.org/2021/06/30/radio-northern-europe-international-show-19-announcement-post/
 
Here's hoping for good propagation 


Re: Opera QSO party running on 7038

Graham
 



Reliable dx spots , [ actual power = 50% carrier , dur to  duty cycle ]

18:02   7038 SV1XV de SV8RV Op2 155 mi -5 dB F:0% in Zakynthos(Zante) isl.GREECE 1523,4 Hz with 25w + Vertical
18:02   7038 SV1XV de RX3DHR Op2 1357 mi -10 dB F:10% in  1498,0 Hz with 25w + Vertical
18:02   7038 SV1XV de G0NBD Op2 1655 mi -22 dB F:5% in Liverpool - 1502.9 Hz with 25w + Vertical
18:02   7038 SV1XV de VK3KCX Op2 -27 dB F:3% in Melbourne 1499.0 Hz

18:04   7038 RX3DHR de SV8RV Op2 1445 mi -17 dB F:19% in Zakynthos(Zante) isl.GREECE 1524,4 Hz with 10w + AVT4
18:04   7038 RX3DHR de SV1XV Op2 1357 mi -12 dB F:20% in Athens 1501.0 Hz with 10w + AVT4
18:04   7038 RX3DHR de G0NBD Op2 1674 mi -21 dB F:13% in Liverpool - 1503.9 Hz with 10w + AVT4


Re: Opera QSO party running on 7038

Graham
 

7038  -  ALL de VK3KCX (Australia): Beacon Op2 every 12:18 in Melbourne 25w + Dipole

Something  complete different ?,  automated   qso  system .. adif listed  as well 

Running  now anyone wants a  try to  VK , 7 open ww  at moment 

last night ,  Via web sdr PERTH vk 23:52 7038 G0NBD de G8FZKSDR Op2 9167 mi -23 dB F:3% in vk 1502.0 Hz

73-Graham
g0nbd


new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more,  take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 19.  
See https://rnei.org/2021/06/30/radio-northern-europe-international-show-19-announcement-post/
 
Here's hoping for good propagation 


new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 19.  
See https://rnei.org/2021/06/30/radio-northern-europe-international-show-19-announcement-post/
 
Here's hoping for good propagation 


TrueTTY 3.10 beta and new PS2x5 mode

Sergei Podstrigailo
 

Hello All,

A new experimental PS2x5 mode is proposed for testing:.

https://www.dxsoft.com/truettyb.zip

TrueTTY Versions History

V3.10
An experimental mode PS2x5 has been implemented.
It is a simple and robust protocol based on FSK2 with strong
FEC based on the Reed-Solomon RS(31,15) code.
The data rate is approximately 0.36 of the baud rate.
It is recommended to choose the frequency shift equal to or twice the
baud rate. Recomended starting parameters for rather bad conditions
are 25 Bd with 50 Hz shift.

===

The protocol details:

PS2x5 is an experimental streaming protocol over FSK2

It can be considered an improved version of AMTOR-FEC (SITOR-B, NAVTEX) with a more
powerful FEC based on Reed-Solomon code RS(31,15) and with much more robust error control.

The probability of receiving a corrupted data chunk is practically eliminated -
a data block (7 bytes) is either received without errors or it is not received at all.

Block numbering ensures that if less than eight blocks are not received that
information about the number of missed characters is also preserved
(unaccepted characters are replaced by underscores).

The full set of single-byte characters (0...255) is supported.
During text exchange a character with code 0 is used
as a non-printable character (it is transmitted when no new data from the operator is received).

The protocol is insensitive to spectrum inversion
(i.e . USB or LSB selection when the signal is forming as AFSK).

The data rate is about 0.36 of the baud rate.
That is, at a baud rate of 25 bauds data rate will be 9 bps,
i.e. some over 60 LPM.

This is why the variant "25 Bd Speed/50 Hz Shift" is proposed as a starting point
for "medium-bad" propagation conditions.

When the baud rate is changed it is recommended to choose the frequency shift equal
to the speed or twice as much.

The protocol details:

Transmitted text is divided into blocks of seven bytes.
A four-bit block number is appended to the each block.
The first eight blocks of transmission are numbered as 8...15,
the next blocks are numbered cyclically as 0...7.

The seven bytes of data and the block number are packed into 12 five-bit symbols,
then 15 bits (three five-bit symbols) of CRC are added to them.

Then 16 check symbols of the Reed-Solomon code are added to the block. So up to eight
erroneous symbols in a each block can be corrected.

Then the resulting block of 31 five-bit symbols is transmitted sequentially
(high bit of a symbol first) using differential FSK2-modulation.

0 is encoded by frequency shift, 1 is the same frequency.

===

Samples of signal in wav-files and the program for generation:

https://www.dxsoft.com/download/ps2x5samples.zip

===

If you didn't buy TrueTTY :-) , this demo-key can be used till 31 July:


ABC(OGAOAKBFDCGANIKBJDEBAMMAAEBEMMEAECAIMAAMAIEJCDHGCNMMBKDF
GEOEJBCDACIOMLBABEEKMELJHDADOGELBJBBDCPAIAFABDMGIMAKBHDMGAOI
KBBDEGICIACGEGIMHJHCOGPAAEADFAOEJJCDEGEBEAJKDEHONMBJHDEFONED
JADIHJBAEAEFEOEJJJDIGONALBCDKAEKAFBKCJFEBIBBECFGCNMJBEDEHEBO
BAMAIJEJBDDEHEBMDBHDEFONAMBFACFHCAGADFGMIMJCDFGMNICMJAMAOOAA
BOKEKBCDEHANICILCPGEOMKBDCCHKMEMBFAGEONILBKDKAGIAKJADCHGOEJB
KDKAKKMMJCDCHJBAGAGECNALJCDKAGIMLBGDPGEOICAICJGIOMIBEDKAGKEK
BNDFGEBMEBKDJHPCACACEGNMJFNAEBIDJADNGJCACILKACIJCIGCNOPBEAEK
EJBLDFGNHACAKAAKEMAFAAFEGICAICDDEBAEBKBKAAKENAFAAFMGICAICHDE
BAEBMBKAAKEOAFIAAA/2056596104)CBA
*Demo07m21y *TrueTTY*



--
Best regards,
Sergei


Understanding APSK and QAM Rohde and Schwarz video #VARA

Graham
 

Understanding APSK and QAM Rohde and Schwarz video


R&S  , Useful  series of  videos covering  aspects of radio 
This video  is applicable to the  VARA modem  coding , 
makes  sense of the  displays  - 

73-Graham
g0nbd


This video provides an introduction to the basic concepts of amplitude and phase shift keying (APSK) and quadrature amplitude modulation (QAM).
You-tube link :-

Understanding APSK and QAM


new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive
details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 19.  
See https://rnei.org/2021/06/30/radio-northern-europe-international-show-19-announcement-post/
 
Here's hoping for good propagation  


Hawaii Vara HF Winlink Vara HF Connection to HB9AK

Graham
 

faultless LINK  using  V-HF  , with  wire  Ae's  and 100 watts Ic7300 
qsp from  original  posting 

73-Graham
g0nbd  

12273km (7626 mi) Email exchange over Ham Radio
Switzerland <-> Hawaii Vara HF Winlink Vara HF Connection to HB9AK 
2021/06/27 07:10:39  USB Dial: 14108.900 





YOU TUBE  VIDEO 

VARA LONG HAUL EXCHANGE


new SW Radiogram program available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive
details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 18.  
See https://rnei.org/2021/06/06/radio-northern-europe-international-show-18-announcement-post/
 
Here's hoping for good propagation 


new SW Radiogram program is available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android  device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 18.  
See https://rnei.org/2021/06/06/radio-northern-europe-international-show-18-announcement-post/
 
Here's hoping for good propagation 


Hawaii Kamehameha Day - Jun 11th

Graham
 

11 HF K6K P2P stations during the event using the VARA HF software modem.

Close to the  first  VARA   HF contest .. pdf link has the  station  QRG and  Mode  b/w 

73-Graham
g0nbd 



Kamehameha Day is an annual state holiday in Hawaii in celebration of King Kamehameha I, who united all the islands in 1810.

After hearing about the cancellation of all King Kamehameha Celebration parade events statewide, Michael Miller - KH6ML, spoke with amateur radio operators and a with the Commission to see if there was a level of interest in an Amateur Radio Day event linking all the islands by ham radio.  Amateur Radio operation has been authorized by the King Kamehameha Celebration Commission as an official event.

The ARRL Special Events Coordinator granted K6K to Hawaii for the event.  Many Hawaii Amateurs have volunteered to operate during the event.  K6K will QRV on phone, CW, RTTY and digital modes, including Winlink. With support from the ARSFI Winlink development team, K6K was authorized as a valid Winlink call. The Hawaii Winlink group plans to operate up to 11 HF K6K P2P stations during the event using the VARA HF software modem.

For more information about Kamehameha Radio Day see https://sites.google.com/view/k6khawaii.

This event will give volunteer Hawaii Operators a chance to test their communications equipment and skills and be ready to assist when the cell phone and the internet fail. Successful radio contacts are eligible to receive a special inscribed certificate bearing the full-color rendition of K6K: King Kamehameha Celebration.

A P2P spotting page with information about Winlink K6K calls (including SSIDs), times, frequencies, and bandwidths (500 or 2300 Hz) is available at http://Winlink-P2P.info.

Contact Michael Miller (KH...@...) for further information.



new SW Radiogram program is available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android  device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 18.  
See https://rnei.org/2021/06/06/radio-northern-europe-international-show-18-announcement-post/
 
Here's hoping for good propagation 


Re: New digital mode PS-18 (HF pager) from DXsoft and Radial, or we invented APRS again :-)

Sergei Podstrigailo
 

Hello All,

HF Pager for Windows 3.01 is released.

http://www.dxsoft.com/hfpagerw.zip


--
Best regards,
Sergei mailto:amx2@dxsoft.com

Windows HAM radio software at http://www.dxsoft.com


HF Pager versions history


V3.01
You can now manually set the coordinates used in the beacon when there
is no GPS receiver (or when there is no data from it).

You can now include a CW-ID (up to 16 symbols) in the beacon.

The set of possible beacon transmission periods has been changed.

The waterfall displays the receiving frequencies corresponding to the selected baud
rate, as well as the nominal receiving frequencies for the 1.46 bauds speed.

The weather forecasts received from the HFPgate (V1.60 NG and newer or HFP Weather)
by the "=x..." command are converted to the human-readable form and saved into
the special folder. A separate folder is created for all messages received on
the same day (local or UTC time, dependings on the settings). Therefore, when the
weather request is making around midnight the sequence of received forecasts can be
splitted into two folders.

Minor fixes have been made.
2.92
The click on "=xGPS" or "#(GPS)" button inserts the current
GPS-coordinates into the beginning of the message (in one of the two formats).

A point with the received coordinates can be displayed on the
selected map by the popup menu.
2.91
The minimum preamble length has been increased to three seconds.

The retransmission logic was changed:
If a NAK (error receipt) is received, then a
message is retrassmitted even if
"Resent till not CFM" checkbox is not set.

PTT control options "OmniRig / CAT" and "OmniRig / Com-port pins" were added.

At 23.44 and 46.88 baud rates ACK or NAK are repeated twice
(with single preamble).

2.90
Baud rate of 23.44 Bd was added. The signal bandwidth in this mode is
about 500 Hz. The center frequency of the audio signal at this speed is
about 1711 Hz and cannot be changed by the user.
The "Setup/Beacon & APRS/Reset beacon timer on a message sending" option
was made.
Any COM-port of COM1...COM99 can be used for PTT control or GPS-receiver
connection.
Minor improvements of the program interface were made.
[...]


new SW Radiogram program is available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website.
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International also uses digital modes during its broadcasts. The June schedule hasn't been announced as of this writing.  See https://rnei.org/ for more information.
   
Here's hoping for good propagation 


Re: New digital mode PS-18 (HF pager) from DXsoft and Radial, or we invented APRS again :-)

Sergei Podstrigailo
 

Hello All,

Free weather informer and APRS-gateway HFP Weather is released.


https://www.dxsoft.com/hfpweatherng.apk


https://www.dxsoft.com/hfp-weather-aen.html



--
Best regards,
Sergei mailto:amx2@dxsoft.com

Windows HAM radio software at http://www.dxsoft.com


new SW Radiogram program is available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more,  take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 17.  
See https://rnei.org/2021/05/08/radio-northern-europe-international-show-17-announcement-post/
 
Here's hoping for good propagation 


Re: New VARA HF v4.4.3 released: #VARA

Graham
 
Edited

File transfer issues with  V-Chat  version 1-2-4  resolved 

VARA Chat v1.2.5

Data   limit is  now  2MB  per  file  

73-Graham
g0nbd 


new SW Radiogram program is available

 

Hello to all the digital folks out there.
 
A new program for the Shortwave Radiogram broadcasts has now been posted on the SW Radiogram website. 
 
If you're new to decoding digital, this is a pretty nice way to get your feet wet. You can use your desktop or laptop, or you can use an Android device such as a smartphone or tablet. You can find links to the SW Radiogram website, software for decoding, and wiki articles with extensive details and help at: http://www.udxf.nl/events.html.  
 
If you'd like to see a list of web receivers (which are often reported as being used), receiver, transceiver and SDR applications and more, take a look at the SW Radiogram gateway at https://wiki.radioreference.com/index.php/Shortwave_Radiogram_Gateway
 
Help is also available on Facebook and Twitter. The SW Radiogram website has the links. 
 
Radio Northern Europe International has announced its new schedule for program 17.  
See https://rnei.org/2021/05/08/radio-northern-europe-international-show-17-announcement-post/
 
Here's hoping for good propagation 

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