Saturday, September 21, 2013

Latest Radio News . . .

Thursday, January 24, 2013

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: 

Sunday, November 18, 2012

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

Thursday, November 1, 2012

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

Saturday, September 8, 2012

Pop'Comm-WRO Live Chat, September 9

Saturday, May 22, 2010

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.