Chat Room Issues

Several regular users of our chat room have experienced problems recently due to some changes in the addonChat software and the URL. Here is a summary of the issues. If you are having problems presently, you may need to apply one or more of the following:

1.  The URL was changed to provide a certificate signed version of the chat applet, which downloads to your computer each time you use chat. The new URL is:
   http://client0.addonchat.com/sc.php?id=237773&s
   The Bell Ringers home page and W4UOA's blog have this new URL. If you are using an old bookmark to it, please update.
2.  Some computers were not able to run the chat applet using Java 6 update 33. Updating to Java 7 update 5 solved this problem. Java 7 adds some (unnecessary) new presentation functionality, somewhat akin to Adobe Flash.
3. Some of our group members, when attempting to start the chat applet, received the error message: Unsigned Access Violation Exception. If you are getting this, try the following steps recommended by our addonChat support contact:
   Close all browsers and then try the following;
   1. Open your computer's control panel.
   2. Double click the java coffee cup.
   3. Click the "Settings" button.
   4. Click the "Delete Files" button.
   5. Check ALL things to be deleted including "Installed Applications and Applets".
   6. Click "OK"
   Once you've done this open your browser and see if it works.

All of the regular chat users are grateful to W4UOA for hosting this application on his server space.

John WA5MLF

Vintage Techno Wizards

This is the title of a June 14 feature article about the Alabama Historical Radio Society that was published in the Black & White City Paper.  Click here to read the article.

HF Digital Modes: JT65

An article in the May 2012 QST (page 44) highlights JT65, an HF digital mode that is seeing strong growth. Its main appeal seems to be that it enables contacts at very low signal levels (using low transmit power and simple antennas). This is a result of its being developed for meteor scatter and EME communication. The digital protocol and software were developed by Nobel laureate Joe Taylor K1JT whose web site devoted to weak signal communication provides background.

A while back Jorge NN4QQ made us aware of WSJT software being used to test propagation paths (Weak Signal Propagation Reporter) and to populate a database and map - WSPRnet - that is available for viewing by anyone on the Web.

A special HF Digital page from ARRL provides links to information, software downloads and audio samples for JT65 and several other digital modes, including the ever popular PSK31.

A Windows version of the JT65 software was developed by Joe Large W6CQZ and is available at the HF Digital page. A brief web search shows that Mac users are also running JT65 via two options:

• Compiling WSJT software to run on a Mac
• Running the Windows version under WINE or Crossover

For details see this Google Groups posting or this Yahoo Groups posting. Many other applicable results can be found by searching with "JT65 Mac". Of course, Linux can also run this software.

Special Event Stations: 100 years since Titanic sinking

Many special event stations this month are observing the 100th year since the sinking of the Titanic (14 April 1912), commemorating the role of radio in reporting the event and summoning of help. Here are a few of the web sites that provide information, including dates, times, frequencies:

• Remembering Titanic MGY
  Includes many photos
• W0S Titanic Special Event
  Located at the Titanic Museum, Branson, MO, this station is a favorite of N0SAP.
• W4S Special Event
  At Pigeon Forge, TN

 On a related note, the article The Titanic's Role in Radio Reform tells how the Titanic sinking triggered a century of radio improvements. A sliding timeline brings a series of 29 short stories or profiles of events and developments.

QST Product Review Summary

N4KC shared this summary of QST Magazine product reviews for HF transceivers or receivers.  It provides a nice color-coded table with key measurements.

Thanks, Don!

March 8-9 Solar Events

The snapshot above tells the story of what propagation was like on March 9. We noticed much weaker than normal signals on 75 m during our morning QSO. Others reported 40 m to be weak, too. I have not heard about the upper bands.

Here are two of the many links that describe the flares and CMEs:
Biggest solar storm in years
Solar storms ramp up

Bell Ringers at BirmingHAMfest

Bell Ringers and friends gathered at the BirmingHAMfest on March 3. See the photos here.