| Jan | Feb |
Mar | Apr | May |
Jun | Jul | Aug |
Sep | Oct | Nov |
Note: These historical tidbits have been collected from various sources, mostly on the Internet. As detailed in
there is a lot of wrong information that is repeated hundreds of times because most websites do not validate with authoritative
sources. On RF Cafe,
events with hyperlinks
have been verified.
significant historical events and
dates for inclusion in these lists. I will be glad to include your name and birthday. Please do not submit your death
date ;-) A couple years ago, I began commemorating the birthdays of notable people and events with
special RF Cafe logos
. Where available, I like to use images
from postage stamps from the country where the person or event occurred.
, after whom the Chebyshev filter transfer function is named, was born. 1830: Mathematician
, inventor of the carbon microphone, was born. 1866:
was invented by Charles Hires. 1881: The first
for the public started service in Germany. 1866: The
replaced the half-dime coin.
was issued his last patent - for an electro-plating device. 1946: Jack Mullin showed the world
magnetic tape recorder
. 1960: A synthetic ruby crystal laser was first operated at Hughes Research
Laboratories. 1963: After 22 Earth orbits
returned to Earth, ending Project Mercury. 1975:
became the first woman to reach
the summit of Mount Everest. 1992: The space shuttle
completed its maiden voyage. 2002:
Star Wars: Episode II - Attack of the Clones
, was released in theaters.