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![World's first cellphone call placed. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-shoebox-phone.gif) 50 x 150 pixel graphic (2.90
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![Paul Revere's Midnight Ride - Please click here to visit RF Cafe.](../borders/logos/logos-small/4-18a.gif) 50 x 150 pixel graphic (2.94
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![Happy Birthday, Melanie! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-melanie-bday.gif) 50 x 150 pixel graphic (4.70
kB) Happy Birthday, Melanie! April 19, 19-something
![Happy Birthday to Jean-Baptiste Biot (Biot-Savart Law)! Please click here to visit RF Cafe.](../borders/images/rf-cafe-biot.gif) 50 x 150 pixel graphic (3.00
kB) Happy Birthday Jean-Baptiste Biot (Biot-Savart Law) April 21, 1774
![Happy Birthday Robert Oppenheimer! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-oppenheimer.gif) 50 x 150 pixel graphic (2.74
kB) Happy Birthday Robert Oppenheimer! April 22, 1904
![Happy Birthday Max Planck! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-planck.gif) 50 x 150 pixel graphic (2.80
kB) Happy Birthday Max Planck! April 23, 1858
![Edison General Electric Company Founded - Please click here to visit RF Cafe.](../borders/images/rf-cafe-edison-ge.gif) 50 x 150 pixel graphic (3.06
kB) Edison General Electric Company Founded April 24, 1889
![Happy Birthday to Guglielmo Marconi! Please click here to visit RF Cafe.](../borders/images/rf_cafe-marconi-bday.gif) 50 x 150 pixel graphic (3.29
kB) Happy Birthday Guglielmo Marconi April 25, 1874
![Happy Birthday Charles Richter! Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-richter.gif) 50 x 150 pixel graphic (2.62
kB) Charles Richter Birthday April 26, 1900
![Happy Birthday Samuel Morse! Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-morse_b-day.gif) 50 x 150 pixel graphic (2.89
kB) Samuel Morse's Birthday April 27, 1791
!["Philosophiae Naturalis Principia Mathematica" - Please click here to visit RF Cafe.](../borders/images/rf-cafe-principia.gif) 50 x 150 pixel graphic (2.68
kB) "Philosophiae Naturalis Principia Mathematica" Published April 28, 1686
![Happy Birthday Philip H. Smith! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-smith.gif) 50 x 150 pixel graphic (2.59
kB) Happy Birthday Philip H. Smith April 29, 1905
![Happy Birthday to Happy Birthday Johann Carl Friedrich Gauss! Please click here to visit RF Cafe.](../borders/images/rf-cafe-gauss.gif) 50 x 150 pixel graphic (3.35
kB) Happy Birthday Johann Carl Friedrich Gauss April 30, 1777
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![Ford Adopted 40-Hour Work Week. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-40-hour-week.gif) 50 x 150 pixel graphic (3.56
kB) Ford Adopted 40-Hour Work Week May 1, 1926
![1st Trans-Atlantic TV Broadcast by Early Bird Satellite. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-early-bird.gif) 50 x 150 pixel graphic (3.56
kB) 1st Trans-Atlantic TV Broadcast by Early Bird Satellite May 2, 1965
![Alan Shepard became 1st American in Space. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-freedom-7.gif) 50 x 150 pixel graphic (3.56
kB) Alan Shepard became 1st American in Space May 5, 1961
![Hindenburg Disaster. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-hindenburg.gif) 50 x 150 pixel graphic (3.56
kB) Hindenburg Disaster May 6, 1937
![V-E Day. Click here to return to the RF Cafe homepage.](../borders/images/RFCafe_V-E%20Day.gif) 50 x 150 pixel graphic (3.22
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![1st Time a Laser Beam Was Bounced off the Moon. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-laser-moon-bounce.gif) 50 x 150 pixel graphic (1.95
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![1st Public Demo of VisiCalc. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-visicalc.gif) 50 x 150 pixel graphic (1.93
kB) 1st Public Demo of VisiCalc May 11, 1979
![NORAD Was Established. Please click here to visit RF Cafe.](../borders/images/rf-cafe-norad.gif) 50 x 150 pixel graphic (2.13
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![American Institute of Electrical Engineers Founded - RF Cafe](../borders/logos/logos-small/5-13.gif) 50 x 150 pixel graphic
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![Happy Birthday to Gabriel Daniel Fahrenheit! Please click here to visit RF Cafe.](../borders/images/rf-cafe-fahrenheit.gif) 50 x 150 pixel graphic (2.82
kB) Happy Birthday Gabriel Daniel Fahrenheit May 14, 1687
![Happy Mother's Day! Click here to return to the RF Cafe homepage.](../borders/images/RF_Cafe_Mothers_Day.gif) 50 x 150 pixel graphic (2.85
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![Peace Officers Memorial Day - Please click here to visit RF Cafe.](../borders/images/rf-cafe-peace-officers-memorial-day.gif) 50 x 150 pixel graphic (2.83
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![Happy Birthday to Oliver Heaviside! Please click here to visit RF Cafe.](../borders/images/rf-cafe-heaviside.gif) 50 x 150 pixel graphic (2.39
kB) Happy Birthday Oliver Heaviside May 18, 1850
![Happy Birthday to Johns Hopkins! Please click here to visit RF Cafe.](../borders/images/rf-cafe-hopkins.gif) 50 x 150 pixel graphic (2.40
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![Happy Birthday to William "Bill" Hewlett! Please click here to visit RF Cafe.](../borders/images/rf-cafe-david-hewlett.gif) 50 x 150 pixel graphic (3.40
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![Charles Lindbergh Lands in Paris. Please click here to visit RF Cafe.](../borders/images/rf-cafe-lindbergh.gif) 50 x 150 pixel graphic (3.05
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![John Bardeen born on this date. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-bardeen.gif) 50 x 150 pixel graphic (3.28
kB) John Bardeen Born May 23, 1908
![Happy Birthday William Gilbert! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-gilbert.gif) 50 x 150 pixel graphic (2.19
kB) Happy Birthday William Gilbert! May 24, 1544
![Happy Birthday Sally Ride! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-ride.gif) 50 x 150 pixel graphic (2.37
kB) Happy Birthday Sally Ride! May 26, 1951
![1st Transatlantic Flight - Please click here to visit RF Cafe.](../borders/images/rf-cafe-nc-4.gif) 50 x 150 pixel graphic (2.96
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![Rockwell's Rosie the Riveter on TIME Cover - Please click here to visit RF Cafe.](../borders/images/rf-cafe-rosie-the-riveter.gif) 50 x 150 pixel graphic (2.34
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![U.S. Copyright Law Passed - Please click here to visit RF Cafe.](../borders/images/rf-cafe-copyright.gif) 50 x 150 pixel graphic (1.73
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![Memorial Day - Remember Our Fallen Servicemen! Please click here to visit RF Cafe.](../borders/images/rf-cafe-memorial_day.gif) 50 x 150 pixel graphic (3.61
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![Happy Birthday Nicholas Léonard Sadi Carnot! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-carnot.gif) 50 x 150 pixel graphic (2.38
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![Robert Morris Page born on this date. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-robert-morris-page.gif) 50 x 150 pixel graphic (3.05
kB) Robert Morris Page Born June 2, 1903
![Edwin White 1st American to Walk in Space. Please click here to visit RF Cafe.](../borders/images/rf-cafe-1st-space-walk.gif) 50 x 150 pixel graphic (2.98
kB) Edwin White 1st American to Walk in Space June 3, 1965
![1st Public Hot Air Balloon Flight. Please click here to visit RF Cafe.](../borders/images/rf-cafe-balloon.gif) 50 x 150 pixel graphic (2.29
kB) 1st Public Hot Air Balloon Flight June 4, 1783
![D-Day. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-d-day.gif) 50 x 150 pixel graphic (4.00
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![Jacques-Arsène d' Arsonval born on this date. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-d-arsonval.gif) 50 x 150 pixel graphic (3.13
kB) Jacques-Arsène d' Arsonval Born June 8, 1851
![First time SOS distress signal was used. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-sos.gif) 50 x 150 pixel graphic (2.36
kB) First time SOS distress signal was used June 10, 1909
![Happy Birthday Charles Fabry! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-fabry.gif) 50 x 150 pixel graphic (2.65
kB) Happy Birthday Maurice Paul Auguste Charles Fabry! June 11, 1867
![Baseball Hall of Fame Dedication - Please click here to visit RF Cafe.](../borders/images/rf-cafe-baseball-hall-of-fame.gif) 50 x 150 pixel graphic (2.82
kB) Baseball Hall of Fame Dedication June 12, 1939
![Happy Birthday James Clerk Maxwell! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-maxwell.gif) 50 x 150 pixel graphic (2.69
kB) Happy Birthday James Clerk Maxwell! June 13, 1831
![Flag Day. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-flag_day.gif) 50 x 150 pixel graphic (2.40
kB) Flag Day June 14
![Happy Birthday Charles-Augustin de Coulomb! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-coulomb.gif) 50 x 150 pixel graphic (2.75
kB) Happy Birthday Charles-Augustin de Coulomb! June 14, 1736
![Radio Bloemendaal Becomes The Netherland's 1st Radio Station - Please click here to visit RF Cafe.](../borders/images/rf-cafe-radio-bloemendaal.gif) 50 x 150 pixel graphic (2.05
kB) Radio Bloemendaal Becomes The Netherland's 1st Radio Station June 15, 1924
![1st Model A Ford Produced - Please click here to visit RF Cafe.](../borders/images/rf-cafe-model-a.gif) 50 x 150 pixel graphic (2.05
kB) 1st Model A Ford Produced June 16, 1903
![Statue of Liberty Arrived in NY - Please click here to visit RF Cafe.](../borders/images/rf-cafe-statue-liberty.gif) 50 x 150 pixel graphic (2.66
kB) Statue of Liberty Arrived in NY June 17, 1885
![Happy Father's Day! Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-fathers_day.gif) 50 x 150 pixel graphic (3.21
kB) Happy Father's Day 3rd Sunday in June
![Dr. Sally Became 1st U.S. Woman in Space - Please click here to visit RF Cafe.](../borders/images/rf-cafe-ride.gif) 50 x 150 pixel graphic (2.69
kB) Dr. Sally Became 1st U.S. Woman in Space June 18, 1983
![Happy Birthday Blaise Pascal! Please click here to visit RF Cafe.](../borders/images/rf-cafe-blaise-pascal.gif) 50 x 150 pixel graphic (2.89
kB) Happy Birthday Blaise Pascal! June 19, 1623
![U.S. Army Air Force Established - Please click here to visit RF Cafe.](images/rf-cafe-usaaf.gif)
50 x 150 pixel graphic (1.82 kB) U.S. Army Air Force Established June 20,
1935
![Summer Solstice. Please click here to visit RF Cafe](../borders/images/rf-cafe-summer-solstice-2009.gif)
![Summer Solstice. Please click here to visit RF Cafe](../borders/images/rf_cafe-summer_solstice.gif) 50 x 150 pixel graphic (3.50
kB) Summer Solstice (1st day of summer) 2009 June 21 05:45 UTC 2010
June 21 11:28 UTC 2011 June 21 17:16 UTC 2012 June 20 23:09 UTC
2013 June 21 05:04 UTC 2014 June 21 10:51 UTC 2015 June 21 16:38
UTC
![Happy Birthday to Siméon-Denis Poisson. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-poisson.gif) 50 x 150 pixel graphic (2.54
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![Greenwich Royal Observatory Established - Please click here to visit RF Cafe.](../borders/images/rf-cafe-royal-observatory.gif) 50 x 150 pixel graphic (2.87
kB) Greenwich Royal Observatory Established June 22, 1675
![Happy Birthday Wilhelm Cauer! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-cauer.gif) 50 x 150 pixel graphic (2.54
kB) Happy Birthday Wilhelm Cauer! June 24, 1900
![1st Color TV Broadcast - Please click here to visit RF Cafe.](../borders/images/rf-cafe-1st-color-broadcast.gif) 50 x 150 pixel graphic (2.30
kB) 1st Color TV Broadcast June 25, 1951
![Happy Birthday Lord Kelvin! Please click here to visit RF Cafe.](../borders/images/rf-cafe-kelvin.gif) 50 x 150 pixel graphic (2.89
kB) Lord Kelvin Born Today June 26, 1824
![Happy Birthday to Augustus De Morgan. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-demorgan.gif) 50 x 150 pixel graphic (2.61
kB) Augustus De Morgan Born June 27, 1806
![Treaty of Versailles. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-treaty_versailles.gif) 50 x 150 pixel graphic (3.38
kB) Treaty of Versailles Signed June 28, 1919
![George Ellery Hale Born Today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-hale.gif) 50 x 150 pixel graphic (3.19
kB) George Ellery Hale Born Today June 29, 1868
![Special Relativity Published - RF Cafe](../borders/images/rf-cafe-special-relativity.gif)
50 x 150 pixel graphic (3.02
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|
RF Cafe |
RF Cafe - Extensive resource
for science and engineering. |
RF Cafe - An extensive resource
for RF, wireless, and all aspects of science and engineering. |
RF Cafe - RF Cafe is a unique
portal of RF, microwave, wireless, and other engineering resources. Vast collection of
equations, references and conversions for electrical, mechanical, physical, and mathematical
fields. Links for vendors, app notes, test notes, ham radio, magazines, books, active
forums, patent and communications standards, technical crossword puzzles, quizzes, and
much more. |
RF Cafe - RF Cafe is a unique
portal for RF and microwave engineering resources. There you will find a vast collection
of original content with definitions, equations, references and conversions that cover
electrical, mechanical, physical, chemical and mathematical fields. Many interactive
calculators are available for everything from filters to voltage dividers. In addition,
you will find extensive links to other websites for vendor parts, application notes,
test notes, amateur radio information, technical magazines and books, patent and communications
standards, and much more.
What makes RF Cafe so attractive is the daily headlines, the daily historical events
list, and even technology-themed crossword puzzles that you will find nowhere else. The
Factoids are always an interesting read, no matter what the subject (always relevant),
and some of the Notable Quotes are hilarious. There is always a plethora of new material
added, and is highlighted in the Recent Additions list. Even occasional humor items are
thrown in to add some levity to the workday.
For the job seeker or the employer seeking applicants, the
RF Cafe Jobs page provides a very focused,
popular and professional venue for posting and searching resumes.
Kirt Blattenberger is a degreed RF engineer who runs RF Cafe with a degree of passion
not apparent in the other top “professional” websites. Many people have been surprised
to learn that RF Cafe is not maintained with a full staff of editors and web designers,
but it is not.
|
![Happy Canada Day! Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-canada-day.gif) 50 x 150 pixel graphic (2.70
kB) Canada Day July 1
![Happy Birthday William Bragg! Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-bragg.gif) 50 x 150 pixel graphic (2.82
kB) Happy Birthday William Bragg! July 2, 1862
![The Dog Days of Summer. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-dog_days.gif) 50 x 150 pixel graphic (1.73
kB) The Dog Days of Summer Begin July 3 to August 11
![Happy 4th of July - Independence Day! Please click here to visit RF Cafe.](../borders/images/rf_cafe-4th_of_july.gif) 50 x 150 pixel graphic (2.73
kB) Independence Day July 4, 1776
![Happy Birthday William John Macquorn Rankine! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-rankine.gif) 50 x 150 pixel graphic (2.46
kB) Happy Birthday William John Macquorn Rankine! July 5, 1820
![Solar Challenger Crosses the English Channel. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-solar-challenger.gif) 50 x 150 pixel graphic (3.78
kB) Solar Challenger Crosses the English Channel July 7, 1981
![UFOs 1st Reported over Roswell, NM. Please click here to visit RF Cafe.](../borders/images/rf-cafe-roswell.gif) 50 x 150 pixel graphic (2.17
kB) UFOs 1st Reported over Roswell, NM July 8, 1947
![Nikola Tesla Born Today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-Nikola-Tesla.gif) 50 x 150 pixel graphic (3.63
kB) Nikola Tesla Born Today July 9, 1856
![EADS was formed. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-EADS.gif) 50 x 150 pixel graphic (2.17
kB) European Aeronautic Defence and Space (EADS) was Formed July 10, 2000
![1st Translantic TV Signal Transmitted via Telstar. Please click here to visit RF Cafe.](../borders/images/rf-cafe-telstar.gif) 50 x 150 pixel graphic (2.60
kB) 1st Transatlantic TV Signal Transmitted via Telstar July 11, 1962
![Happy Birthday Buckminster Fuller! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-fuller.gif) 50 x 150 pixel graphic (2.49
kB) Happy Birthday Buckminster Fuller! July 12, 1895
![Ernõ Rubik Born Today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-erno-rubik.gif) 50 x 150 pixel graphic (3.20
kB) Ernõ Rubik was Born Today July 13, 1944
![Sarah E. Goode 1st Black Woman Awarded Patent - Please click here to visit RF Cafe.](../borders/images/rf-cafe-goode.gif) 50 x 150 pixel graphic (2.18
kB) Sarah E. Goode 1st Black Woman Awarded Patent July 14, 1885
![Pavel Cherenkov was born. - Please click here to visit RF Cafe.](../borders/images/rf-cafe-pavel-cherenkov.gif) 50 x 150 pixel graphic (2.17
kB) Pavel Cherenkov was Born July 15, 1904
![The Day of Trinity. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-trinity.gif) 50 x 150 pixel graphic (3.59
kB) The Day of Trinity July 16, 1945
![Apollo-Soyuz Rondezvous. Please click here to visit RF Cafe.](../borders/images/rf-cafe-apollo-soyuz.gif) 50 x 150 pixel graphic (2.05
kB) Apollo-Soyuz Rondezvous July 17, 1975
![Intel Incorporated Today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-intel.gif) 50 x 150 pixel graphic (2.45
kB) Intel Incorporated Today July 18, 1968
![Apollo 11 Landed on the Moon! - Please click here to visit RF Cafe.](../borders/logos/logos-small/7-20.gif) 50 x 150 pixel graphic (2.25
kB) Apollo 11 Landed on the Moon! July 20, 1969
![Friedrich Wilhelm Bessel Born Today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-bessel.gif) 50 x 150 pixel graphic (2.46
kB) Friedrich Wilhelm Bessel Born Today July 22, 1784
![Happy Birthday Walter Schottky! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-schottky.gif) 50 x 150 pixel graphic (2.56
kB) Happy Birthday Walter Schottky! July 23, 1886
![Happy Birthday Amelia Earhart! Please click here to visit RF Cafe.](../borders/images/rf-cafe-earhart.gif) 50 x 150 pixel graphic (2.13
kB) Happy Birthday Amelia Earhart! July 24, 1897
![1st Geosynchronous Satellite - Syncom 2 - Please click here to visit RF Cafe.](../borders/images/rf-cafe-syncom-2.gif) 50 x 150 pixel graphic (2.39
kB) 1st Geosynchronous Satellite - Syncom 2 July 26, 1963
![Trans-Alaska Pipeline Loaded 1st Oil onto Tanker - Please click here to visit RF Cafe.](../borders/images/rf-cafe-alaska-pipeline.gif) 50 x 150 pixel graphic (3.61
kB) Trans-Alaska Pipeline Loaded 1st Oil onto Tanker July 28, 1977
![NASA Created by an Act of Congress. Please click here to visit RF Cafe.](../borders/images/rf-cafe-nasa.gif) 50 x 150 pixel graphic (2.55
kB) NASA Created by an Act of Congress July 29, 1958
![Happy Birthday Vladimir Zworykin! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-Vladimir-Zworykin.gif) 50 x 150 pixel graphic (2.91
kB) Happy Birthday Vladimir Kosma Zworykin! July 30, 1889
50 x 150 pixel graphic (2.33 kB) Samuel Hopkins Awarded 1st U.S. Patent
July 31, 1790
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![1st Official Metre Defined - Please click here to visit RF Cafe.](../borders/images/rf-cafe-meter.gif) 50 x 150 pixel graphic (2.23
kB) 1st Official Metre Defined August 1, 1793
![Happy Birthday Elisha Gray! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-gray.gif) 50 x 150 pixel graphic (2.35
kB) Happy Birthday Elisha Gray! August 2, 1835
![Radio Shack's TRS-80 Computer Announced - Please click here to visit RF Cafe.](../borders/images/rf-cafe-trs-80.gif) 50 x 150 pixel graphic (2.10
kB) Radio Shack's TRS-80 Computer Announced August 3, 1977
![U.S. Coast Guard was Established - Please click here to visit RF Cafe.](../borders/images/rf-cafe-us-coast-guard.gif) 50 x 150 pixel graphic (2.82
kB) U.S. Coast Guard was Established August 4, 1790
![Happy Birthday Neil Armstrong! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-neil-armstrong.gif) 50 x 150 pixel graphic (3.21
kB) Happy Birthday Neil Armstrong! August 5, 1930
![1st WWW Site Published - Please click here to visit RF Cafe.](../borders/logos/logos-small/8-6a.gif) 50 x 150 pixel graphic (2.44
kB) Tim Berners-Lee Published the 1st WWW Site August 6, 1991
![Guadalcanal Campaign Launched - Please click here to visit RF Cafe.](../borders/images/rf-cafe-guadalcanal.gif) 50 x 150 pixel graphic (2.30
kB) Guadalcanal Campaign Launched August 7, 1942
![Happy Birthday, Paul Dirac! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-dirac.gif) 50 x 150 pixel graphic (2.89
kB) Paul Dirac (Dirac Delta Function) Was Born August 8, 1902
![Happy Birthday Amedeo Avogadro! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-avogadro.gif) 50 x 150 pixel graphic (3.15
kB) Happy Birthday Amedeo Avogadro! August 9, 1776
![Happy Birthday Leo Fender! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-fender.gif) 50 x 150 pixel graphic (2.02
kB) Happy Birthday Leo Fender! August 10, 1981
![The IBM PC Was Introduced to the World - Please click here to visit RF Cafe.](../borders/images/rf-cafe-ibm-pc.gif) 50 x 150 pixel graphic (3.15
kB) The IBM PC Was Introduced to the World August 12, 1981
![Happy Birthday Anders Ångström! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-angstrom.gif) 50 x 150 pixel graphic (2.69
kB) Happy Birthday Anders Ångström! August 13, 1814
![The Code Talkers. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe_code_talkers.gif) 50 x 150 pixel graphic (2.66
kB) National Code Talker's Day August 14
![Hugo Gernsback, born August 16, 1884 - RF Cafe](../borders/images/rf-cafe-hugo-gernsback.gif) 50 x 150 pixel graphic (3.52
kB) Hugo Gernsback's Birthday August 14
![Sony Released Its 1st Music CD-ROM - Please click here to visit RF Cafe.](../borders/images/rf-cafe-cd-rom.gif) 50 x 150 pixel graphic (2.84
kB) Sony Released Its 1st Music CD-ROM August 17, 1982
![Happy Birthday Brook Taylor! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-taylor.gif) 50 x 150 pixel graphic (2.65
kB) Happy Birthday Brook Taylor! August 18, 1685
![Happy Birthday Philo T. Farnsworth! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-farnsworth.gif) 50 x 150 pixel graphic (2.69
kB) Happy Birthday Philo T. Farnsworth! August 19, 1906
![Hawaii Became the 50th State - Please click here to visit RF Cafe.](../borders/images/rf-cafe-hawaii.gif) 50 x 150 pixel graphic (2.20
kB) Hawaii Became the 50th State August 21, 1958
![1st Victrola Went on Sale - Please click here to visit RF Cafe.](../borders/images/rf-cafe-victrola.gif) 50 x 150 pixel graphic (2.07
kB) 1st Victrola Went on Sale August 22, 1906
![Gossamer Condor Wins Kremer Prize - Please click here to visit RF Cafe.](../borders/images/rf-cafe-gossamer-condor.gif) 50 x 150 pixel graphic (3.86
kB) Gossamer Condor Wins Kremer Prize August 23, 1977
![France Detonated Its 1st Thermonuclear Bomb - Please click here to visit RF Cafe.](../borders/images/rf-cafe-france-a-bomb.gif) 50 x 150 pixel graphic (3.08
kB) France Detonated Its 1st Thermonuclear Bomb August 24, 1968
![Happy Birthday Joshua Lionel Cowen! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-lionel.gif) 50 x 150 pixel graphic (2.87
kB) Happy Birthday Joshua Lionel Cowen! August 25, 1880
![Happy Birthday Lee De Forest! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-de-forest.gif) 50 x 150 pixel graphic (3.15
kB) Happy Birthday Lee De Forest! August 26, 1873
![1st Edition of Scientific American Published - Please click here to visit RF Cafe.](../borders/images/rf-cafe-sciam.gif) 50 x 150 pixel graphic (2.67
kB) 1st Edition of Scientific American Published August 28, 1845
![Happy Birthday Ernest Rutherford! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-rutherford.gif) 50 x 150 pixel graphic (2.65
kB) Happy Birthday Ernest Rutherford! August 30, 1871
![Happy Birthday Hermann Von Helmholtz! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-helmholtz.gif) 50 x 150 pixel graphic (2.90
kB) Happy Birthday Hermann Von Helmholtz! August 31, 1821
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![Pioneer 11 Reaches Saturn - Please click here to visit RF Cafe.](../borders/images/rf-cafe-pioneer-11.gif) 50 x 150 pixel graphic (2.79
kB) Pioneer 11 Reaches Saturn September 1, 1979
![Happy Birthday Hiram Percy Maxim! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-hiram-percy-maxim.gif) 50 x 150 pixel graphic (2.80
kB) Happy Birthday Hiram Percy Maxim! September 2, 1869
![1st Color Photos of Mars Taken by Viking Lander 2 - Please click here to visit RF Cafe.](../borders/images/rf-cafe-viking-2.gif) 50 x 150 pixel graphic (3.09
kB) 1st Color Photos of Mars Taken by Viking Lander 2 September 3, 1976
![Happy Birthday John Dalton! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-dalton.gif) 50 x 150 pixel graphic (2.63
kB) Happy Birthday John Dalton! September 6, 1803
![Happy Birthday David Packard! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-packard.gif) 50 x 150 pixel graphic (2.76
kB) Happy Birthday David Packard! September 7, 1912
![Star Trek Debuted on NBC! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-star-trek.gif) 50 x 150 pixel graphic (2.74
kB) Star Trek Debuted on NBC! September 8, 1966
![1st Computer Bug Discovered! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-computer-bug.gif) 50 x 150 pixel graphic (3.07
kB) 1st Computer Bug Discovered! September 9, 1945
![Happy Birthday Arthur Compton! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-compton.gif) 50 x 150 pixel graphic (2.59
kB) Happy Birthday Arthur Compton! September 10, 1892
![9-11 Heroes Medal of Valor. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe-9-11.gif) 50 x 150 pixel graphic (2.60
kB) 9-11 Heroes Medal of Valor September 11, 2001
![Jack Kilby Builds World's 1st IC - Please click here to visit RF Cafe.](../borders/images/rf-cafe-kilby-ic.gif) 50 x 150 pixel graphic (2.80
kB) Jack Kilby Builds World's 1st IC September 12, 1958
![Charles de Cisternay DuFay Born Today - Please click here to visit RF Cafe.](../borders/images/rf-cafe-dufay.gif) 50 x 150 pixel graphic (2.35
kB) Charles de Cisternay DuFay Born Today September 14, 1698
![RCA Introduces the 12AX7 Tube - Please click here to visit RF Cafe.](../borders/images/rf-cafe-12ax7.gif) 50 x 150 pixel graphic (2.14
kB) RCA Introduces the 12AX7 Tube September 15, 1947
![Billy Durant Incorporated General Motors - Please click here to visit RF Cafe.](../borders/images/rf_cafe-gm.gif)
50 x 150 pixel graphic (2.91 kB) Billy Durant Incorporated General Motors
September 16, 1908
![Space Shuttle Enterprise Debuts - Please click here to visit RF Cafe.](../borders/images/rf-cafe-enterprise.gif) 50 x 150 pixel graphic (2.14
kB) Space Shuttle Enterprise Debuts September 17, 1976
![The U.S. Army Army Force became the U.S. Air Force - Please click here to visit RF Cafe.](../borders/images/rf-cafe-usaaf-usaf.gif) 50 x 150 pixel graphic (2.49
kB) The U.S. Army Army Force became the U.S. Air Force September 18, 1947
![1st Smiley Face Appeared on a Bulletin Board - Please click here to visit RF Cafe.](../borders/images/rf-cafe-smiley.gif) 50 x 150 pixel graphic (1.04
kB) 1st Smiley Face Appeared on a Bulletin Board September 19, 1982
![World's 1st Radio Newscast at KDKA - Please click here to visit RF Cafe.](../borders/images/rf-cafe-kdka.gif) 50 x 150 pixel graphic (2.53
kB) World's 1st Radio Newscast at KDKA September 20, 1921
![Autumnal Equinox. Please click here to visit RF Cafe.](../borders/images/rf-cafe-fall-equinox-2009.gif) 50 x 150 pixel graphic (2.81
kB)
![Autumnal Equinox. Please click here to visit RF Cafe.](../borders/images/rf-cafe-fall-equinox.gif) 50 x 150 pixel graphic (2.69
kB) Autumnal Equinox (1st day of Autumn/Fall)
![TI Introduced the DATAMATH Series of Calculators - Please click here to visit RF Cafe.](../borders/images/rf-cafe-ti-datamath.gif) 50 x 150 pixel graphic (2.75
kB) TI Introduced the DATAMATH Series of Calculators September 22, 1972
![Robert Bosch Born Today - Please click here to visit RF Cafe.](../borders/images/rf-cafe-bosch.gif) 50 x 150 pixel graphic (2.99
kB) Robert Bosch Born Today September 23, 1861
![USS Enterprise - World's 1st Nuclear-Powered Aircraft Carrier Launched - Please click here to visit RF Cafe.](../borders/images/rf-cafe-uss-enterprise.gif) 50 x 150 pixel graphic (2.77
kB) USS Enterprise - World's 1st Nuclear-Powered Aircraft Carrier Launched September
24, 1960
![Collins Radio Company Incorporated - Please click here to visit RF Cafe.](../borders/images/rf-cafe-collins.gif) 50 x 150 pixel graphic (2.58
kB) Collins Radio Company Incorporated September 25, 1933
![Happy Birthday Seymour Cray! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-cray.gif) 50 x 150 pixel graphic (2.91
kB) Happy Birthday Seymour Cray! September 28, 1925
![Happy Birthday Enrico Fermi! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-fermi.gif) 50 x 150 pixel graphic (2.54
kB) Happy Birthday Enrico Fermi! September 29, 1901
![Johannes (Hans) Wilhelm Geiger Born Today - Please click here to visit RF Cafe.](../borders/images/rf-cafe-geiger.gif) 50 x 150 pixel graphic (2.58
kB) Johannes (Hans) Wilhelm Geiger Born Today September 30, 1882
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![1st Ford Model T Built - Please click here to visit RF Cafe.](../borders/images/rf-cafe-model-t.gif) 50 x 150 pixel graphic (2.43
kB) 1st Ford Model T Built October 1, 1908
![Happy Birthday Peanuts! Please click here to visit RF Cafe.](../borders/images/rfcafe-peanuts.gif) 50 x 150 pixel graphic (2.18
kB) Happy Birthday Peanuts! October 2, 1950
![Transistor Patented by Shockley, Bardeen and Brattain - Please click here to visit RF Cafe.](../borders/images/rf-cafe-transistor.gif) 50 x 150 pixel graphic (2.85
kB) Transistor Patented by Shockley, Bardeen and Brattain October 3, 1950
![Sputnik. Click here to return to the RF Cafe homepage](../borders/images/rf_cafe-sputnik.gif) 50 x 150 pixel graphic (3.03
kB) Sputnik Launched - The Space Age Begins October 4, 1957
![Happy Birthday Robert Goddard! - Please click here to visit RF Cafe.](../borders/images/rf-cafe-goddard.gif) 50 x 150 pixel graphic (2.85
kB) Happy Birthday Robert Goddard! October 5, 1882
![George Westinghouse Born Today - Please click here to visit RF Cafe.](../borders/images/rf-cafe-westinghouse.gif) 50 x 150 pixel graphic (2.50
kB) George Westinghouse Born Today October 6, 1846
![Neils Bohr Born Today. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-bohr.gif) 50 x 150 pixel graphic (2.57
kB) Neils Bohr Born Today October 7, 1885
![Erie Canal Inaugurated. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-erie-canal.gif) 50 x 150 pixel graphic (3.17
kB) Erie Canal Inaugurated October 8, 1823
![U.S. Naval Academy Opened. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-usna.gif) 50 x 150 pixel graphic (2.40
kB) U.S. Naval Academy Opened October 10, 1845
![Kathryn Sullivan Became 1st U.S. Woman Spacewalker. Click here to return to the RF Cafe homepage.](../borders/images/rf-cafe-sullivan.gif) 50 x 150 pixel graphic (2.60
kB) Kathryn Sullivan Became 1st U.S. Woman Spacewalker October 11, 1984
![Columbus Day. Click here to return to the RF Cafe homepage.](../borders/images/rf_cafe_columbus_day.jpg) 50 x 150 pixel graphic (4.36
kB) Columbus Day 2nd Monday in October
![1st Cellular Service Launched. Please click here to visit RF Cafe.](../borders/images/rf-cafe-amc.gif) 50 x 150 pixel graphic (1.78
kB) 1st Cellular Service Launched October 13, 1983
![Chuck Yeager breaks the sound barrier. Please click here to visit RF Cafe.](../borders/images/rf_cafe-bell_x-1.gif) 50 x 150 pixel graphic (3.13
kB) Chuck Yeager Breaks the Sound Barrier October 14, 1947
![Buon Compleanno, Evangelista Torricelli! Please click here to visit RF Cafe.](../borders/images/rf-cafe-torricelli.gif) 50 x 150 pixel graphic (2.63
kB) Buon Compleanno, Evangelista Torricelli! October 15, 1608
![Radio Corporation of America Established. Please click here to visit RF Cafe.](../borders/images/rf-cafe-rca.gif) 50 x 150 pixel graphic (3.38
kB) Radio Corporation of America Established October 17, 1919
![British Broadcasting Company Formed. Please click here to visit RF Cafe.](../borders/images/rf-cafe-bbc.gif) 50 x 150 pixel graphic (2.96
kB) British Broadcasting Company Formed October 18, 1922
![1st Commercial Wind Power at Grandpa's Knob, VT. Please click here to visit RF Cafe.](../borders/images/rf-cafe-wind-power.gif) 50 x 150 pixel graphic (2.10
kB) 1st Commercial Wind Power at Grandpa's Knob, VT October 19, 1941
![Alfred Nobel born today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-nobel.gif) 50 x 150 pixel graphic (1.85
kB) Alfred Nobel Born October 21, 1833
![Princeton (College of NJ) Received Its Charter. Please click here to visit RF Cafe.](../borders/images/rf-cafe-princeton.gif) 50 x 150 pixel graphic (2.15
kB) Princeton (College of NJ) Received Its Charter October 22, 1746
![Today is Mole Day - 6.02 x10^23. Please click here to visit RF Cafe.](../borders/images/rf_cafe_mole_day.gif) 50 x 150 pixel graphic (2.92
kB) Mole Day - 6:02 am to 6:02 pm on 10/23 October 23
![Bulova Accutron 214 Introduced. Please click here to visit RF Cafe.](../borders/images/rf-cafe-accutron-214.gif) 50 x 150 pixel graphic (1.94
kB) Bulova Accutron 214 Introduced - 1st Electronic Watch October 25, 1960
![Maiden flight of the P-51 Mustang. Please click here to visit RF Cafe.](../borders/images/rf-cafe-p-51.gif) 50 x 150 pixel graphic (2.29
kB) Maiden flight of the P-51 Mustang October 26, 1940
![KDKA Assigned Its Call Letters. Please click here to visit RF Cafe.](images/rf-cafe-kdka-call-sign.gif) 50 x 150 pixel graphic (2.15
kB) KDKA Assigned Its Call Letters October 27, 1940
![Statue of Liberty (a gift from France) Was Dedicated. Please click here to visit RF Cafe.](images/rf-cafe-statue-liberty.gif) 50 x 150 pixel graphic (2.59
kB) Statue of Liberty (a gift from France) Was Dedicated October 28, 1886
![The first mesage via ARPANET was supposed to be "LOGIN," but it crashed after just the "L" and the "O." Please click here to visit RF Cafe.](../borders/images/rf_cafe-arpanet.gif) 50 x 150 pixel graphic (2.92
kB) 1st Message Sent via the ARPANET October 29, 1969
!["The War of the Worlds" was broadcast. Please click here to visit RF Cafe.](images/rf-cafe-war-of-the-worlds.gif) 50 x 150 pixel graphic (2.92
kB) "The War of the Worlds" was broadcast. October 30, 1938
![Narinder Singh Kapany Born - "Father of Fiber Optics" - Please click here to visit RF Cafe.](../borders/images/rf-cafe-narinder-singh-kapany.gif) 50 x 150 pixel graphic (2.91
kB) Narinder Singh Kapany Born "Father of Fiber Optics" October 31, 1927
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![Don't forget to reset you clock for Daylight Saving Time. Please click here to visit RF Cafe](../borders/images/rf_cafe-DT.gif)
50 x 150 pixel graphic (3.03 kB) Daylight Saving Time Begins 2nd Sunday in
March Ends 1st Sunday in November
![1st Hydrogen Bomb Detonated. Please click here to visit RF Cafe.](../borders/images/rf-cafe-h-bomb.gif) 50 x 150 pixel graphic (2.55
kB) 1st Hydrogen Bomb Detonated November 1, 1952
![Howard Hughes' Spruce Goose makes it's 1st and only flight. Please click here to visit RF Cafe.](../borders/images/rf_cafe-spruce_goose.gif) 50 x 150 pixel graphic (3.30
kB) Spruce Goose's 1st and only flight November 2, 1947
![Happy Birthday Daniel Rutherford! Please click here to visit RF Cafe.](../borders/images/rf-cafe-daniel-rutherford.gif) 50 x 150 pixel graphic (3.30
kB) Happy Birthday Daniel Rutherford! November 3, 1749
![Happy Birthday Benjamin F. Goodrich! Please click here to visit RF Cafe.](../borders/images/rf-cafe-goodrich.gif) 50 x 150 pixel graphic (2.13
kB) Happy Birthday Benjamin F. Goodrich! November 4, 1841
![1st engineering college in U.S. - Rensselaer (RPI). Please click here to visit RF Cafe.](../borders/images/rf_cafe-rpi.jpg) 50 x 150 pixel graphic (3.81
kB) 1st engineering college in U.S. - Rensselaer (RPI) November 5, 1824
![Happy Birthday Marie Curie! Please click here to visit RF Cafe.](../borders/images/rf-cafe-curie.gif) 50 x 150 pixel graphic (2.91
kB) Happy Birthday Marie Curie! November 7, 1867
![Happy Birthday Edmond Halley! Please click here to visit RF Cafe.](../borders/images/rf-cafe-halley.gif) 50 x 150 pixel graphic (3.30
kB) Happy Birthday Edmond Halley! November 8, 1656
![Happy Birthday Carl Sagan! Please click here to visit RF Cafe.](../borders/images/rf-cafe-sagan.gif) 50 x 150 pixel graphic (2.95
kB) Happy Birthday Carl Sagan! November 9, 1934
![United States Marine Corps Established. Please click here to visit RF Cafe.](../borders/images/rf-cafe-usmc.gif) 50 x 150 pixel graphic (2.14
kB) United States Marine Corps Established November 10, 1775
![Veteran's Day - Honoring All Who Served. Please click here to visit RF Cafe.](../borders/images/rf_cafe-veterans_day.gif) 50 x 150 pixel graphic (3.79
kB) Veteran's Day - Honoring All Who Served November 11
![Happy Birthday Leo Baekeland! Please click here to visit RF Cafe.](../borders/images/rf-cafe-baekeland.gif) 50 x 150 pixel graphic (2.66
kB) Happy Birthday Leo Baekeland November 14, 1863
![Intel Introduced the 4004 Microprocessor. Please click here to visit RF Cafe.](../borders/images/rf-cafe-intel-4004.gif) 50 x 150 pixel graphic (2.85
kB) Intel Introduced the 4004 Microprocessor November 15, 1971
![SETI's Arecibo Message Sent. Please click here to visit RF Cafe.](../borders/images/rf-cafe-seti.gif) 50 x 150 pixel graphic (3.89
kB) SETI's Arecibo Message Sent November 16, 1974
![Alles Gute zum Geburtstag August Möbius August Möbius. Please click here to visit RF Cafe.](../borders/images/rf-cafe-mobius.gif) 50 x 150 pixel graphic (2.78
kB) Alles Gute zum Geburtstag August Möbius November 17, 1790
![Happy Birthday Alan Shepard. Please click here to visit RF Cafe.](../borders/images/rf-cafe-shepard.gif) 50 x 150 pixel graphic (3.39
kB) Happy Birthday Alan Shepard November 18, 1923
![Happy Birthday Eileen Collins! Please click here to visit RF Cafe.](../borders/images/rf-cafe-eileen-collins.gif) 50 x 150 pixel graphic (2.70
kB) Happy Birthday Eileen Collins! November 21, 1956
![Microsoft Windows 1.0 Released. Please click here to visit RF Cafe.](../borders/images/rf-cafe-windows-1.gif) 50 x 150 pixel graphic (2.12
kB) Microsoft Windows 1.0 Released November 20, 1985
![1st Untethered Manned Hot Air Balloon Flight. Please click here to visit RF Cafe.](../borders/images/rf-cafe-hot-air-balloon.gif) 50 x 150 pixel graphic (2.65
kB) 1st Untethered Manned Hot Air Balloon Flight November 21, 1783
![B2 Stealth Bomber Unveiled. Please click here to visit RF Cafe.](../borders/images/rf-cafe-b2-bomber.gif) 50 x 150 pixel graphic (3.13
kB) B2 Stealth Bomber Unveiled November 22, 1988
![John Wallis - Mr. Infinity - born today. Please click here to visit RF Cafe.](../borders/images/rf-cafe-wallis.gif) 50 x 150 pixel graphic (2.90
kB) John Wallis - Mr. Infinity - born today November 23, 1616
![First Ad Appeared for a Wireless Telegraph Set. Please click here to visit RF Cafe.](../borders/images/rf-cafe-wireless-telegraph.gif) 50 x 150 pixel graphic (3.05
kB) First Ad Appeared for a Wireless Telegraph Set November 25, 1905
![Happy Thanksgiving! Please click here to visit RF Cafe.](../borders/images/rf_cafe-thanksgiving.gif) 50 x 150 pixel graphic (4.36
kB) Happy Thanksgiving 4th Thursday in November
![Happy Birthday Konosuke Matsushita! Please click here to visit RF Cafe.](../borders/images/rf-cafe-matsushita.gif) 50 x 150 pixel graphic (2.29
kB) Happy Birthday Konosuke Matsushita! November 27, 1894
![Happy Birthday Christian Doppler! Please click here to visit RF Cafe.](../borders/images/rf-cafe-doppler.gif) 50 x 150 pixel graphic (2.61
kB) Happy Birthday Christian Doppler! November 29, 1803
50 x 150 pixel graphic (3.46 kB) Hanukkah 25th day of Kislev (late
November to December)
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![Happy Birthday Martin Heinrich Klaproth. Please click here to visit RF Cafe.](../borders/images/rf-cafe-klaproth.gif) 50 x 150 pixel graphic (2.32
kB) Happy Birthday Martin Heinrich Klaproth December 1, 1743
![1st Sustained Fission Reaction. Please click here to visit RF Cafe.](../borders/images/rf-cafe-fission-reaction.gif) 50 x 150 pixel graphic (2.85
kB) 1st Sustained Fission Reaction at Univ. of Chicago December 2, 1942
![Happy Birthday John Backus! Please click here to visit RF Cafe.](../borders/images/rf-cafe-backus.gif) 50 x 150 pixel graphic (2.35
kB) Happy Birthday John Backus! December 3, 1924
![Happy Birthday Clyde Cessna! Please click here to visit RF Cafe.](../borders/images/rf-cafe-cessna.gif) 50 x 150 pixel graphic (3.14
kB) Happy Birthday Clyde Vernon Cessna! December 5, 1879
![Pearl Harbor Day. Please click here to visit RF Cafe.](../borders/logos/logos-small/12-7.gif) 50 x 150 pixel graphic (2.75
kB) Pearl Harbor Day December 7, 1941
![Coaxial Cable Patent Day. Please click here to visit RF Cafe.](../borders/images/rf_cafe_coax_cable_day.gif) 50 x 150 pixel graphic (2.66
kB) Coaxial Cable Patent Day December 8, 1931
![Happy Birthday Grace Hopper! Please click here to visit RF Cafe.](../borders/images/rf-cafe-hopper.gif) 50 x 150 pixel graphic (2.76
kB) Happy Birthday Grace Hopper! December 9, 1906
![Happy Birthday Carl Gustav Jacob Jacobi! Please click here to visit RF Cafe.](../borders/images/rf-cafe-jacobi.gif) 50 x 150 pixel graphic (2.17
kB) Happy Birthday Carl Gustav Jacob Jacobi! December 10, 1804
![Happy Birthday Sir David Brewster! Please click here to visit RF Cafe.](../borders/images/rf-cafe-brewster.gif) 50 x 150 pixel graphic (2.32
kB) Happy Birthday Sir David Brewster! December 11, 1781
![Marconi sent 1st transatlantic radio message: dit, dit, dit. Please click here to visit RF Cafe.](../borders/images/rf_cafe-marconi_radio.gif) 50 x 150 pixel graphic (2.66
kB) Marconi sent 1st transatlantic radio message dit, dit, dit (•••, the letter
"s") December 12, 1901
![Happy Birthday Ernst Werner von Siemens. Please click here to visit RF Cafe.](../borders/images/rf-cafe-von-siemens.gif) 50 x 150 pixel graphic (2.57
kB) Happy Birthday Ernst Werner von Siemens December 13, 1816
![Happy Birthday Tycho Brahe. Please click here to visit RF Cafe.](../borders/images/rf-cafe-brahe.gif) 50 x 150 pixel graphic (2.54
kB) Happy Birthday Tycho Brahe! December 14, 1546
![Happy Birthday Gustav Eiffel! Please click here to visit RF Cafe.](../borders/images/rf-cafe-eiffel.gif) 50 x 150 pixel graphic (3.07
kB) Happy Birthday Gustav Eiffel! December 15, 1832
![World's 1st Transistor Invented. Please click here to visit RF Cafe.](../borders/images/rf-cafe-1st-transistor.gif) 50 x 150 pixel graphic (2.03
kB) World's 1st Transistor Invented December 16, 1947
![Battle of the Bulge. Please click here to visit RF Cafe.](../borders/images/rf_cafe-battle-of-the-bulge.gif) 50 x 150 pixel graphic (4.03
kB) Battle of the Bulge December 16, 1944
![Anniversary of Powered Flight - the Wright Brothers. Please click here to visit RF Cafe.](../borders/images/rf_cafe-anniv_flight.gif) 50 x 150 pixel graphic (2.70
kB) Anniversary of Powered Flight December 17, 1903
![Edwin Armstrong - Invented frequency modulation, superheterodyne & regenerative receivers. Please click here to visit RF Cafe.](../borders/images/rfcafe_armstrong.gif) 50 x 150 pixel graphic (3.78
kB) Happy Birthday Edwin Armstrong! Born December 18, 1890
![SCORE Satellite Launched. Please click here to visit RF Cafe.](../borders/images/rf-cafe-SCORE.gif) 50 x 150 pixel graphic (2.36
kB) SCORE Satellite Launched December 19, 1958
![Robert Van de Graaff. Please click here to visit RF Cafe.](../borders/images/rf_cafe_van_de_graaff.gif) 50 x 150 pixel graphic (3.28
kB) Robert Van de Graaff Born December 20, 1901
![Winter Solstice. Please click here to visit RF Cafe](../borders/images/rf_cafe-winter_solstice.jpg) 50 x 150 pixel graphic (3.41
kB) Winter Solstice (1st day of winter)
![SR-71 Blackbird Maiden Flight. Please click here to visit RF Cafe](../borders/images/rf-cafe-sr-71.gif) 50 x 150 pixel graphic (2.96
kB) SR-71 Blackbird Maiden Flight December 22, 1964
![1st Manned Orbit of the Moon by Apollo 8. Please click here to visit RF Cafe](../borders/images/rf-cafe-apollo-8.gif) 50 x 150 pixel graphic (2.43
kB) 1st Manned Orbit of the Moon by Apollo 8 December 23, 1968
![Happy Birthday James Joule! Please click here to visit RF Cafe](../borders/images/rf-cafe-joule.gif) 50 x 150 pixel graphic (2.61
kB) Happy Birthday James Joule! Born December 24, 1818![Merry Christmas! Joyeux Noël! Frohe Weihnachten! Buon Natale! Feliz Navidad! веселое рождество! Καλά Χριστούγεννα! メリークリスマス! 圣诞快乐! عيد ميلاد سعيد! Please click here to visit RF Cafe.](../borders/images/rf_cafe-christmas.gif) 50 x 150 pixel graphic (2.67
kB) Merry Christmas! Joyeux Noël! Frohe Weihnachten! Buon Natale!
Feliz Navidad! веселое рождество! Καλά Χριστούγεννα!;! メリークリスマス! 圣诞快乐!
عيد ميلاد سعيد! December 25
![Happy Birthday Charles Babbage! Please click here to visit RF Cafe](../borders/images/rf-cafe-babbage.gif) 50 x 150 pixel graphic (2.73
kB) Happy Birthday Charles Babbage! Born December 26, 1791
![Happy Birthday Clemens Winkler! Click here to return to the RF Cafe homepage.](../borders/logos/logos-small/12-26a.gif) 50 x 150 pixel graphic (2.38
kB) Happy Birthday Clemens Winkler! December 26, 1838
![Happy Birthday Johannes Kepler! Please click here to visit RF Cafe](../borders/images/rf-cafe-kepler.gif) 50 x 150 pixel graphic (2.88
kB) Happy Birthday Johannes Kepler! Born December 27, 1571
![Admiral Sold the 1st Color Television Set. Please click here to visit RF Cafe](../borders/images/rf-cafe-color-tv.gif) 50 x 150 pixel graphic (2.51
kB) Admiral Sold the 1st Color Television Set Born December 30, 1953
![Last Calvin and Hobbes comic strip. Please click here to visit RF Cafe.](../borders/images/rfcafe-calvin-hobbes.gif) 50 x 150 pixel graphic (2.12
kB) Last Calvin and Hobbes Comic Strip December 31, 1995
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Many of these logos commemorate people, places, and companies. My intention is to
pay tribute to the significance of each. Images have been gathered from all over the
Internet; ownership, copyright, legal right to use, etc., are all acknowledged when possible,
and are in no way meant to imply any affiliation between RF Cafe and the entity being
referenced. If you object to the use of an image and are the legal owner, please let
me know and I will be glad to remove it.
![Please click here to visit RF Cafe](images/RF-Cafe-Banner-468x60.jpg)
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