Today in Science History -
Private Jets Fly into Climate Conference (commercial
is for the little people)
Telcos Add 44M 5G Subscribers in September
• Zungtin 2 PCS Bulk Rough Black Tourmaline Crystals Large Raw Nat
in Electromagnetic Emissions
• FDA Issues Draft on
510(k) Medical Device Electronic Emissions
Advances Yield More Functions, Less Battery Drain
to Surpass 50% in Fast-Charge Market in 2025
• FCC Job Opening for
• Rogers Claims
Canada's 1st 5G Standalone Network
Key Century Club Numbers 25k Members
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You might think that being concerned about
the inefficiency of traditional Edison type incandescent light bulbs is a recent
thing. However, as this 1945 Radio-Craft magazine editorial by Hugo Gernsback
points out, it was known early on that only about 10% of the energy consumed by
those bulbs actually create light while the rest is dissipated as heat. The difference
is that at the time, the "science" was telling us we were headed for a new Ice Age,
whereas nowadays the same science is telling us we're headed for planetary death
by Global Warming. He postulates a world that will someday be powered by the conversion
of solar energy to electricity, and also predicts
via visible light rather than radio waves. Vacuum tubes would operate at and
emit visible light signals to eliminate cables...
"The National Association for Amateur Radio®
for these positions at its Headquarters in Newington, Connecticut." Who is the
NAAR, you might ask? A WWW search might leave you wondering, but according to the
HTML "description" meta tag on the
PACMAXI Sewing Accessories Storage Bag, Knitting, Craft Tools an
webpage, "The American Radio Relay League (ARRL) is the national association for
amateur radio, connecting hams around the U.S. with news, information and resources."
Hence, NAAR=ARRL. Positions include: Lab Engineer EMC/RFI Specialist, Administrative
Assistant, Director of Information Technology, Marketing Communications Associate,
Public Relations & Outreach Manager, Social Media Strategist...
"Han and Leia. George and Amal. Kermit and
Miss Piggy. Gomez and Morticia. History's greatest
on communication to make them so strong their power cannot be denied. But that's
not just true for people (or Muppets), it's also true for lasers. According to new
research from the USC Viterbi School of Engineering, recently published in Nature
Photonics, adding two lasers together as a sort of optical 'IT couple' promises
to make wireless communications faster and more secure than ever before. Most laser-based
communications - think fiber optics, commonly used for things like high-speed internet
- is transmitted in the form of a laser beam traveling through a cable. Optical
communications is exceptionally fast but is limited by the fact that it must travel
through physical cables..."
Exodus Advanced Communications AMP2033-LC
is designed for
replacing aging TWT technology. A broadband, rugged EMC Class A/AB linear design
for all modulations & industry standards. Covers 6.0-18.0 GHz, produces >100 W
Minimum, 50 W P1dB, with a minimum 50 dB gain. Designed for EMI/RFI, lab,
CW/pulse and all communication applications. Excellent flatness, optional monitoring
parameters for forward/reflected power, VSWR, voltage, current & temperature
sensing for superb-reliability. Exodus Quiet-Cool technology in our compact 5U-chassis
weighing a nominal 75 lbs. Exodus is a multinational RF communication equipment
and engineering service company serving both commercial and government entities
and their affiliates worldwide...
The 1950s was a time of transition in the
television watching business. Broadcasters were experimenting with
pay-TV systems to replace or supplement over-the-air service. Much as people
today think that everything on the Internet should be free, the same mindset prevailed
then regarding television programming. Early coding and decoding schemes seem really
hokey by today's standards, using computer-type punch cards. I remember the area
around Annapolis, Maryland, where I grew up, had both over-the-air and cable-based
subscription services in conjunction with the open broadcasts. I spent at least
a little time playing with the horizontal and vertical picture sync settings on
the back of the TV set that, if lucky...
With more than 1000
custom-built symbols, this has got to be the most comprehensive set of
Symbols available for RF, analog, and digital system and schematic drawings!
Every object has been built to fit proportionally on the provided A-, B- and C-size
drawing page templates (or can use your own). Symbols are provided for equipment
racks and test equipment, system block diagrams, conceptual drawings, and schematics.
Unlike previous versions, these are NOT Stencils, but instead are all contained
on tabbed pages within a single Visio document. That puts everything in front of
you in its full glory. Just copy and paste what you need on your drawing. The file
format is XML so everything plays nicely with Visio 2013 and later...
ConductRF is continually innovating and
developing new and improved solutions for RF Interconnect needs. See the latest
TESTeCON RF Test
Cables for labs. ConductRF makes production and test coax cable assemblies for
amplitude and phased matched VNA applications as well as standard & precision
RF connectors. Over 1,000 solutions for low PIM in-building to choose from in the
iBwave component library. They also provide custom coax solutions for applications
where some standard just won't do. A partnership with Newark assures fast, reliable
access. Please visit 5 Packs Ombre Braiding Hair Jumbo Braiding Hair Extensions 24 in today to see how they can help your project!
Electronics has dominated our lives ever
since the first commercially available radios became available in the early twentieth
century. It was a mysterious miracle science then and still is today. Most people
have no understanding of electronics; they just know that life without it is unimaginable.
Fantastic new applications for electronics are continually being introduced to supplement
or replace mechanical devices. Sensing and control are prime applications for electronics
that improve functionality and safety. This promotion of the MIT-Sperry Detonation
Indicator, aka the "Knock−O−Meter,"
is a good example. It appeared in a 1945 issue of Radio−Electronics magazine, near
the end of World War II. Today, such a name invokes chuckles and usually implies
a joke of a product, but not so at the time...
The synchronous motor in my vintage
General Electric Model 7-4305C Roll-Down Number Clock Radio began making grinding
noises. An investigation showed it was the 3.6 rpm AC synchronous motor. It
was tightly sealed, so I carefully drilled an 1/8" hole in the housing (being sure
not to get metal debris inside), inserted a few drops of 3−in−1 oil and shook it
around, then re-installed it, plugged it back in and voila - no more noise! (see
photos). BTW, if you can even find these motors on eBay, they cost more than an
entire clock-radio. Fortunately, I found another 7-4305C at a yard sale so I have
"Most of us
all the time without even thinking about it, usually in mundane ways: we don a pair
of sunglasses and put on sunscreen, and close - or open - our window blinds. But
the control of light can also come in high-tech forms. The screen of the computer,
tablet, or phone on which you are reading this is one example. Another is telecommunications,
which controls light to create signals that carry data along fiber-optic cables.
Scientists also use high-tech methods to control light in the laboratory, and now,
thanks to a new breakthrough that uses a specialized material only three atoms thick,
they can control light more precisely than ever before. The work was conducted in
Balsa is one of the lightest woods available,
and in many respects has the highest strength-to-weight ratio of any wood - even
oak. The chart at the right gives a comparison of a few familiar wood types. Hobby
grade balsa is harvested in the jungles of Ecuador, kiln dried, cut into large blocks,
and shipped to the U.S. for final cutting and sanding. Most balsa from hobby shops
is in the 8-10 lbs/ft3 realm. The rock-hard stock that nobody wants is sent to the
airplane kit manufacturers ;-) The vast majority of the balsa wood I use for building
model airplanes comes from Sig, Midwest, and Balsa USA. Other suppliers have materialized
in the past few years. Since the rise of mammoth wind turbines for electricity generation,
balsa's use as a core material for blades has caused a severe shortage in the modeling
realm. Balsa prices have skyrocketed in the past decade...
Boy Scouts of
America was formed in 1910 in conjunction with The Boy Scouts Association in
the UK. Per their 2007 website statement, "The aim of the Association is to promote
the development of young people in achieving their full physical, intellectual,
social and spiritual potential, as individuals, as responsible citizens and as members
of their local, national and international communities." Part of being a Boy Scout
is earning merit badges by performing certain community services and by demonstrating
proficiency at defined tasks. Radio proficiency is one such merit badge. In order
to earn the Radio merit badge, along with certain other projects the Boy Scout must
participate in either Amateur Radio, Broadcast Radio, or Shortwave Listening. This
article reports on amateur radio activities across the globe. The Scout oath is,
"On my honor I will do my best To do my duty to God and my country and to obey the
Scout Law; To help other people at all times; To keep myself physically strong,
mentally awake, and morally straight..."
Wrangler Men's 20X No. 42 Vintage Boot Cut Jean, Misty, 28W x 36RF Cascade Workbook 2018 is the next phase in the evolution
of RF Cafe's long-running series, RF Cascade Workbook. Chances are you
have never used a spreadsheet quite like this (click here for screen capture). It is a full-featured RF system
cascade parameter and frequency planner that includes filters and mixers for a mere
$45. Built in MS Excel, using RF Cascade Workbook 2018 is a cinch
and the format is entirely customizable. It is significantly easier and faster than
using a multi-thousand dollar simulator when a high level system analysis is all
that is needed. An intro video takes you through the main features...
Copper Mountain Technologies develops innovative
and robust RF test and measurement solutions for engineers all over the world. Copper
Mountain's extensive line of unique form factor
Network Analyzers include an RF measurement module and a software application
which runs on any Windows PC, laptop or tablet, connecting to the measurement hardware
via USB interface. The result is a lower cost, faster, more effective test process
that fits into the modern workspace in lab, production, field and secure testing
Engineering & Science Theme crossword puzzle for October 31st has many words
and clues related to RF, microwave, and mm-wave engineering, optics, mathematics,
chemistry, physics, and other technical subjects. As always, this crossword contains
no names of politicians, mountain ranges, exotic foods or plants, movie stars, or
anything of the sort unless it/he/she is related to this puzzle's technology theme
(e.g., Reginald Denny or the Tunguska event in Siberia). The technically inclined
cruciverbalists amongst us will appreciate the effort. Enjoy!
Atenlab has been operating in Taiwan for
more than a decade, and has sold and installed hundreds chambers around the world.
Holistic, affordable Over-the-Air
(OTA) measurement systems perform comprehensive measurement and test in a controlled
environment. Compact Antenna Test Range (CATR) with one-touch operation supports
multiple systems - 2G, 3G, 4G, 5G - and major instrument brands. [M]ulti-probe OTA
measurement systems offer reduced time measurements over single-probe systems.
Applying the adjective "portable" to electronics
equipment in the vacuum tube era was often a stretch of the term. Usually, portable
radios were backpack ordeals with a separate battery carried by second person. They
can be seen in a lot of the old War War II movies. It was really not until
the advent of the "ColourTree CTAPR1416 Custom Size 13' x 23' White Sun Shade Sail"
two-way radio sets that a truly hand-held, self-contained system was available.
This "Inside the Handi−Talke" article from a 19467 issue of Radio−Craft magazine
provides a very detailed look at the internal components and of the schematics.
"Walkie−Talkie" was another name often given to the Handi−Talkie, although some
might argue that there is a distinct difference. Handi−Talkies used to be widely
available on eBay, but are very scarce at this time - and the sale prices reflect
that reality. A lot of the listings use the term Handi−Talkie as a ruse...
"From the internet, to fiber or satellite
communications and medical diagnostics, our everyday life relies on optical technologies.
These technologies use optical pulsed sources to transfer, retrieve or compute information.
Gaining control over optical pulse shapes thus paves the way for further advances.
Ph.D. student Bennet Fischer and postdoctoral researcher Mario Chemnitz, in the
team of Professor Roberto Morandotti of the Institut national de la recherche scientifique
(INRS), developed a
smart pulse-shaper integrated on a chip. The device output can autonomously
adjust to a user-defined target waveform with strikingly low technical and computational
Here is a little levity from the "Hobnobbing
with Harbaugh" series of comics that appeared in Popular Electronics magazine. Unfortunately,
none of the "The
5 Most Wanted Household Inventions" have come to full fruition in the marketplace
yet, although the cellphone blockers can be found on the Internet in various unofficial
forms. Personal computers were a pipe dream in 1963, but nowadays we do have software
like TurboTax to take care of filing taxes, although you still can't simply dump
all your receipts into a bin and have it work. Flat-fixing robots might not be needed
in a few years as tubeless, airless tires hit the road. Alarm clock vaporizers are
not Star Trek phaser-like devices yet, but the same effect can be affected with
a low-tech hammer, or a shoe...
Whilst checking on something else regarding
Guerrilla RF, I noticed that they have a few
LIGHTEN Transparent Face Mask Lightweight advanced anti-fog and posted
that include: SOI Design Engineer, PA Design Engineer, Quality and Reliability Engineer,
and Reliability Engineering Technician. They are based in the Greensboro, NC, location.
Guerrilla RF was founded by Ryan Pratt the engineer son of an original founder
of RF Micro Devices (now
also has many job openings worldwide). I'm not getting paid for this, but please
let them know you saw them mentioned on RF Cafe.
openings for non-engineers result from industry growth and shortage of skilled
men." Thus goes the subtitle for this 1957 Radio & TV News magazine
article pitching the promises of a career in electronics technology. It came at
a time that predated throw-away everything rather than attempting to repair stuff.
It was before the term "personal device" (aka "throw-away") had been coined. It
was before placards warning "No user serviceable parts inside" were routinely stuck
on practically every item purchasable in a department store. It was a time when
people took stuff apart to see how it works, and were actually able to figure it
out because parts were large enough to see and actually moved, and even printed
circuit boards could be deciphered since trances were on the two outside surfaces
and components had leads...