Watch: A U.S. Government CW Training Film, Circa 1944

Tax-Eve Pop'Comm-WRO Live Online Chat, Sunday, April 14

St. Paddy's Day Live Online Chat, Sunday, March 17

It's the Pop'Comm-WRO Super Bowl Half Time Chat

Join the Pop'Comm Monitoring Station Program

Have you joined the Pop'Comm Monitoring Station program? Get a station identification sign and download a certificate: http://bit.ly/XCo2wG

Pop'Comm-WRO Live Internet Chat, Sunday, January 13

December 2012 Pop'Comm-WRO Live Chat

January 2012 WRO - Cross Streets, Part II: Note 1

Permanent memory at this time was a Programmable Read Only Memory chip. The first generation was not erasable. You programmed a memory location by using very short pulses of higher-than-normal voltage to blow fuseable links inside the chip.  Hence the term “burning.”

If you made a mistake, there was no “undo” or “real easy” way to fix it.  The not-so-cheap chip was now trash and you had to start over.  Thus, burning a PROM was a task done in a careful, slow and deliberate fashion – with no one else at home and the phone off the hook.

An alternate approach, for a small bit of code, was to populate a board with 1N48, 1N914 or similar diodes, to create your own PROM.  If a diode was soldered in, the bit was a “1.”  If the connection point was open, the bit was “0.”

Some early CW ID encoders for RTTY and repeaters - many still working today - used such schemes, as well. - WA3UVV

Pop'Comm-WRO Live Internet Chat, November 4

November 2012 WRO Reader Survey

You're invited to take the November 2012 WRO Reader Survey online. Click here to be linked to the questionnaire. It takes only a few minutes and will help us to better bring you content that is relevant and entertaining. Thanks.

- Richard Fisher, KI6SN

Editor, WorldRadio Online

WRO-Pop'Comm Live Chat, Sunday, October 21

DUE TO SCHEDULING CONFLICTS,

THE POP'COMM-WRO LIVE ONLINE CHAT SCHEDULED FOR SUNDAY, OCTOBER 7 HAS BEEN POSTPONED UNTIL SUNDAY, OCTOBER 21. WE APOLOGIZE FOR THE LATE NOTICE AND INCONVENIENCE.

- Richard Fisher, KPC6PC / KI6SN

Editor, Popular Communications

and WorldRadio Online

Pop'Comm-WRO Live Chat, September 9

More Photos of the Myers Crystal Set

Here are more pictures of the crystal set designed by Arlo Myers, WA6UDR, and featured in the June 2010 edition of WorldRadio Online magazine.

For an enlarged view, click on each image.