Walter Drake Releases Guide
to Thermoformed Packaging
Walter Drake, a thermoformed packaging manufacturer, has recently released the "Purchasers
Guide to Thermoformed Packaging". The guide will assist buyers and
in the correct selection of thermoformed packaging such as plastic clamshells,
thermoformed trays and blister packs. Walter Drake designs and manufactures custom
thermoformed plastic packaging in the form of clamshells, trays and blisters for the
medical, pharmaceutical, electronic (ESD,
static dissipative), consumer and industrial packaging applications.
Do You Need an Expert
to Sue an Expert?
article by Bob Ambrogi, of
IMS Expert Services,
rhetorically asks the question of whether an 'expert' is required in order to
sue another 'expert' because of his sworn testimony.
this particular case an expert was hired to help prove claims of wrongdoing by a neighboring
industrial complex. Being declared qualified as an 'expert' varies from state to state, but
it usually requires extensive documented professional experience, and/or an advanced college
degree, and/or professional registration as a result of special testing. I, for example, would
likely not qualify to serve as an expert witness in a trial. Like it or not - and many people
believe it to be a form of acceptable payola...
ECM Announces Distribution
Agreement w/MECA Electronics
announced a new authorized distribution agreement with
MECA Electronics to supply the manufacturer's line of USA made rugged & reliable RF/microwave
passive DC – 20 GHz microwave components and solutions globally.
MECA serves all areas of the RF/Microwave industries including world class network providers. They
have long been the "backbone" of high performance wired and air-interfaced networks such as
in-building applications, satellite communications, radar, radio communications, telemetry
applications, mobile radio, aviation and air traffic communications...
Carl & Jerry: Aiding an Instinct
1962, John T. Frye's techie troubleshooting teenagers
Carl and Jerry had graduated from high school and were attending Parvoo University
(PU?) as electrical engineering students. It was a natural progression.
Unlike many of the company names and products - like the Delco DN278 transistor mentioned
here - that appeared in the Popular Science series, the college's name is fictional.
Maybe author Frye had a connection to Porvoo, Finland, and Anglicized the name. I ran "parvoo"
through a couple online anagram solvers to see if it was a disguised name
(which would be apropos for a detective story) and the closest
it came to a real word is 'vaporo,' which is an Esperanto term...
I first saw the title of this poem from a 1941 edition of National Radio News, I thought it
was going to be a plea to amateur radio operators not to give up their hobby just because
the government would eventually prohibit broadcasting during the World War II years.
As it turns out, the poem predated that era and is instead a generic encouragement to the
magazine's readers to press on regardless of obstacles. It did show up in the Christmas issue,
so maybe it was simply a message in the spirit of peace on Earth and goodwill toward man.
In these harsh years of the government fomenting division and class envy amongst its citizens,
it's kind of hard to relate to such a gentle, kindly mindset, but indeed it did once exist
in America. Anyway, I though it was worth reprinting here. "Don't
Quit" is sort of a simpler version of Rudyard Kipling's famous poem of inspiration titled
for Arduino Development
you haven't yet heard about the Arduino single board
computer (SBC) experimenter's platform, then either you have
been in a coma or you are just now entering the tech world. Think of Arduino as the electronic
version of the famous mechanical Erector Set that was popular beginning in the early 20th
century. Or, consider it the "grown-up" version of Lego's computerized Mindstorms building
sets. Per the official website, "Arduino is an open-source electronics prototyping platform
based on flexible, easy-to-use hardware and software. It's intended for artists, designers,
hobbyists and anyone interested in creating interactive objects or environments..."
!!! FREE SMA Finger Wrench !!!
Courtesy Bracke Mfg.
now have a source for those much-sought-after plastic
SMA finger wrenches! Bracke Mfg manager
Lawrence P. sent me an email today saying that Bracke will be glad to mail anyone who
requests them a sample of up to 5 of the SMA finger wrenches - what a guy! I'm guessing he
saw the plea posted here on RF Cafe and on various forums for people looking desperately for
the things. The SMA finger (thumb) wrench,
known also by its Latin binomial nomenclature of 'digitus
divellit,' is a rare breed of tool for the RF / microwave engineer, and appears to be
indigenous to industry trade shows like MTT-S and European Microwave Conference...
Satellites and ET EM Waves
to around 1960, the nature of electromagnetic radiation outside the Earth's atmosphere was
entirely a matter of scientific conjecture. As is evidenced by this 1961 article, at the time
it was still not known for certain whether
electromagnetic energy outside the bands transmitted through the ionosphere existed for
sure. There was of course no reason to believe that low frequency, long wavelength radio waves
were not present along with the rest of the spectrum, but experiments needed to be developed
that would launch satellites above the atmosphere to detect probable out-of-band signals and
then re-transmit them on frequencies known to easily penetrate the 'ether.' Many failures
occurred along the way, but persistence paid off...
Explaining Tuned Circuits
resonant tank circuits has not changed since they were first investigated more than a
century ago. This "After Class" tutorial that ran in the May 1961 edition of Popular Electronics
is typical of the series where the author speaks as though he was giving an impromptu lesson
to a gathering of students after the scheduled classroom period was over or, in this instance
as though he was having a casual discussion with a friend who was perplexed by a particular
electronics phenomenon. Figures and equations are often drawn by hand to augment the informal
setting rather than being typeset. Here, "Larry" is amazed...
New RF Cafe Quiz:
Microwave Circulator Design
10-question quiz tests your knowledge about
design. Circulator design has advanced significantly since the first edition of this book
was published 25 years ago. The objective of this second edition is to present theory, information,
and design procedures that will enable microwave engineers and technicians to design and build
circulators successfully. This resource contains a discussion of the various units used in
the circulator design computations, as well as covers the theory of operation. This book presents
numerous applications, giving microwave engineers new ideas about how to solve problems using
Cover Sistemi Uses Microwave
Office to Design UWB Receiver
Sistemi, an Italian electronics developer, used AWR software to
design a UWB
receiver from concept to final production in a single pass. Specifications were for a
complete design starting from the antenna through to the entire RF/baseband analog chain down
to the AD converter. Cover Sistemi used Microwave Office® for the circuit design and AXIEM®
for the EM simulation. The scope of work included all design phases, from high-level simulation
to circuit-level design and final verification of pre-layout and post-layout.
An Interesting Experiment
in Weighing the Electron
might say almost, that all modern scientific investigation in the basic sciences, and a good
deal of all practical developments, are connected in some way or other with the electron."
So writes Dr. Irving J. Sax in 1932 regarding the incentive for determining as precisely
as possible the
and electrical charge of an electron. The Bohr atomic model had just been introduced two
decades earlier, so the entire concept of particle physics was still in its infancy. As with
most areas of physics, experiments are conducted with particular biases and expectations such
that often the results are manipulated as needed to conform to preconceptions. Look no further
than the complex retrograde motion planetary models devised and perfected by early astronomers...
Many Thanks to ISOTEC
for Long-Time Support
our inception in 1996, ISOTEC has been a leading manufacturer of RF and microwave connectors
such as SMA, MCX, SSMB, Low PIM, N, 7/16 type, and RF components such as attenuators,
power dividers and more, for wireless service providers, and other RF systems designers. We
provide recognized and trusted products and service to our customers in more than 60 countries
worldwide. ISOTEC offers also an extensive product mix with RF Filters and Multiplexers and
What to Do with a Tape
Recorder (until the hi-fi arrives)
tape recorders? They began going the way of the typewriter about two decades ago when
solid state voice recorders hit the market, but now smartphones with sound recording have
made even those devices seem outdated. In fact, when my daughter's house burned down a few
weeks ago, all of the on-site conversations with the insurance adjuster, fire marshal, and
housing contractors were recorded to ensure an accurate account of what was said by all parties. Even
though I was 800 miles away at the time, I was still able to listen to the dialog. In North
Carolina, law does not require you to apprise other parties...
Anatech Intros Cavity BPF,
Ceramic BPF, & 13 dB Coupler
Electronics has released new designs for a
2,533 MHz cavity bandpass filter, a 749 MHz ceramic bandpass filter, and an 800-2,500
MHz 13 dB directional coupler. All can be ordered directly through their
AMCrf web store.
New Dilbert Book: I Sense
a Coldness to Your Mentoring
can't go wrong with a good Dilbert book like
I Sense a Coldness to Your Mentoring, by Scott Adams. Dilbert is the most photocopied,
pinned-up, downloaded, faxed, and e-mailed comic strip in the world. Dubbed "the cartoon hero
of the workplace" by the San Francisco Examiner, Dilbert has been syndicated since 1989 and
now appears in 2,000 newspapers in 65 countries and 25 languages.
Please Visit Orbel in
Appreciation of Their Support
is the leading designer and manufacturer of
RF Shielding and EMI/RFI Isolation Products
for printed circuit boards and electronic
Board level shielding, EMI contact strips and rings, BeCu finger-stock and metalized
fabric gaskets, connector gaskets. Orbel also specializes in thin gauge
Photo Etched Metal Parts
and Precision Metal Stampings
made from a wide variety of material options.
A New Round of RF
is continuing to be a great year for magazine articles. These I have
from Microwaves & RF and Microwave Journal are fine examples.
Beyond the Basics,
Market Sees Increased
Growth, S.h Mangiola
Differential Drive Optimizes
Active Mixers, Q. Luu,
Modern High Efficiency
Amplifier Design: Envelope
Tracking, Doherty and
Outphasing, R. Pengelly,
Z. Wang, D. Holmes,
M. Acar, R. Wesson,
M.P. van der Heijden
Cost Effective 3D Glass
Advanced RF Packages,
J.H. Flemming, R. Cook,
S. Sibbet, C.F. Schmidt,
K. Dunn, J. Gouker
House Bill S.2206
Let Me Google That for You Act
What do Google, LinkedIn, Apple, Twitter, Facebook, Yahoo, Bing, Verizon, Microsoft, Sprint,
etc., etc., etc., all have in common? Answer: They all willingly participate
with the NSA, FBI, CIA, DHS, ATF, etc., etc., etc., in collecting as much data as possible
about you and me. You might say the former group has become an unofficial branch of the later
group. Well, it is about to become official based on
House Bill S.2206 - Let Me Google That for You.
It is just as well since the Google twins (not really twins)
already get discount military jet fuel purchases and, along with other American royalty like
Mr. Gates and Jeff Bezos, have open doors to the White House any time they demand it. The
Act is ostensibly a cost-cutting measure and effectively...
April 14, 2014
Equality to most politicians is taking from people who work for a living and giving it to
people who vote for a living." - Anon
A Nostalgic Adventure: Midland
10-561 Shortwave Restoration
to Internet, there has never been a better opportunity to be able to step back in time and
reclaim some of your past indulgences. A lot of guys are using resources like eBay and specialty
website forums to search for items remembered from days of yore. Although I can't imagine
how it can be so based on my slacker personal habits as a teenager, there are still available
a fairly large number of hobby type items that I recall owning - many in like-new condition
and some even in their original, unopened packages. If you are about my age or even older,
chances are you have either done some of the same, or have considered doing so.
Bob Davis, an RF systems and circuits designer of many years, has submitted accounts of
a couple radio restoration projects he...
your diode switch analysis skills here with six circuits designed by Mr. Robert P. Balin in
the July 1961 issue of Popular Electronics. When evaluating the equivalent circuits
with the diodes biased on or off, don't make the job more difficult for yourself by considering
whether there is enough voltage or current to turn a particular diode on or not, just whether
the diode is forward or reverse biased. Doing so reduces everything to simple series and parallel
combinations. Redrawing each circuit either with a short for a forward biased diode and an
open for a reverse biased diode makes the task easier.
Radar & Radio Crossword
for April 13, 2014
a break from the drudgery by trying your hand at some of these goodies. Every word in the
RF Cafe crossword puzzles
is specifically related to engineering, mathematics, and science. There are no generic backfill
words like many other puzzles give you, so you'll never see a clue asking for the name of
a movie star or a mountain on the Russia-China border.
I will be travelling and have limited access to RF Cafe for the next couple days. Please
forgive any delay in response.
Z-Comm Intros Ultra
Compact L-Band VCO
announces a new RoHS compliant VCO model
in the L-band. The USSP1570-LF operates from 1540 to 1600 MHz with the narrow tuning
voltage range of 0.5 to 2.5 Vdc. This miniaturized VCO features phase noise of -90 dBc/Hz
@ 10 kHz offset while operating off a 2.7 Vdc supply and drawing a mere 6mA of current.
The USSP1570-LF provides the end user an output power of -1±3 dBm into a 50 Ω load
while operating over the industrial temperature range of -40 to 85º C...
Out of Order:
Of Pointy-Haired Bosses
story, submitted by RF Cafe visitor Jerry L., of Cincinnati, OH, reminds me of a certain manager
in a popular engineering comic strip. Jerry writes: I worked in the defense electronics industry
for my entire career and it is hard to
of a project in more than four decades that was not made infinitely more difficult due to
the 'helpful' input of project managers. One experience in particular comes to mind as a perfect
topic for your Out of
Order feature. In the mid 1970s I was a "fresh-out," as new engineering college graduates
were called at the time. Newly minted as a Masters degreed electrical engineer, my aspirations
were high and I was ready to set the mobile radio system world on fire...
Advanced Test Equipment
Rentals April 2014 Newsletter
Test Equipment Rentals just issued their TEC Talk newsletter for April 2014. It includes
hot topics in the tech news world, highlights of new or special function test equipment they
have available, and some electronics industry news.
PMI Dielectrically Stabilized
GaAs FET Oscillator @ 16.3 GHz
DRO-16D3G-CD-1 is a
stabilized GaAs FET oscillator with a center frequency of 16.3 GHz. This model
provides minimum output power of +11 dBm with all spurs held to -55 dBc and harmonics
held to -20dBc. The mechanical tuning frequency is ±25 MHz and the unit has
a phase noise of -70 dBc/Hz. The unit requires +15 VDC and 150 mA and measures
1.06" x 1.63" x 0.98"
The Tube Family Tree (Part 3)
photomultiplier, traveling wave, compactron, klystron, backward wave, pencil, lighthouse,
cathode ray, indicator, nuvistor, acorn, peanut, T-R, electrostatic, cat's-eye, orithon, and
loctal, are just a few of the many types of
vacuum tubes that have been and in some cases still are in use in various types of electronic
equipment. Some you have heard of, others you probably have not. All are discussed in a series
of three articles published in Popular Electronics. This is part 3, which includes operational
descriptions of klystrons, magnetrons (in your microwave oven),
and traveling wave tubes...
Carl & Jerry:
Pure Research Rewarded
and Jerry in handcuffs? Say it ain't so! Has the pair of good-natured, upstanding high-tech
sleuths gone to the Dark Side (George Lucas 18 years old in 1962 when
this was written)? Read the tale to see how they figure into a plot to kill a local
judge, and why they decide to cannibalize a service station television set for parts. What
has come over Carl and Jerry?
Tracking Signal Generator
Supports Spectrum Analyzers
Instruments offers the TG6000, a generic
tracking signal generator that is compatible with new and legacy RF/microwave spectrum
can provide a TG signal from near DC to beyond 6 GHz enabling swept scalar type measurements
with a Spectrum Analyzer. In addition a fully synthesized signal source is integrated into
the TG6000 allowing its use as a standalone signal generator. The SG source has a frequency
range from 25 MHz to 6 GHz. Typical dynamic range for swept response of a DUT is >80 dB.
Skyworks Intros Family of
Hyperabrupt Varactor Diodes
introduces a series of surface-mount, silicon, hyperabrupt junction tuning varactor diodes
for automotive, consumer, defense and infrastructure markets. The
provides high capacitance ratio and low-series resistance, suitable for use in low-phase noise,
voltage-controlled oscillators, voltage-tuned phase shifters, bandpass filters and microwave
tuners at frequencies up to and above 2.5 GHz. The Series is also ideal for wideband
UHF and VHF applications.
Look How They're
the early 1960s,
nickel-cadmium (NiCad or NiCd) batteries were the way of
the future due to a combination of high charge storage density and recharging ability. Carbon-zinc
(C-Zn) cells were well established by then and had performed
reliably during World War II and in Korea. Alkaline batteries were considered the de
facto high standard for critical applications that required longer life and higher current
than C-Zn could supply, but were (and still are) considerably
more expensive. Mercury cells exhibited a fairly constant voltage level during useful life,
which made them preferable for applications with a low voltage variance tolerance. Lithium-ion
(Li-Ion) cells, those things...
What the #!$% Is Bitcoin?
has been in the headlines often for the last couple years. It was heralded in the media as
"a new kind of money," a form of e-currency that was supposed to level the global financial
playing field so that no one country would have a
on the economy. Mt. Gox, a short form of "Magic: The Gathering Online Exchange," was
smoking hot. Fantastic stories appeared almost daily of Bitcoin valuations rising at astronomical
rates while making overnight millionaires of people who had "discovered" forgotten caches
of bitcoins in their computer hard drives. For a while, it appeared the goal might be achieved,
but then suddenly Bitcoin mania was stigmatized by word of scandal. Mt. Gox was shut
Many Thanks for AMC's
Microwave Corporation (AMC) uses a state-of-the-art clean room to manufacture all of it's
products, as well as a fully automated machine shop. AMC is a leader in the
and manufacturing of DC to
40 GHz solid state control components for commercial and military grades. PIN diode
switches and attenuators, detector log video amplifiers, and power dividers and couplers are
among their offerings.
is a humorous "kwiz"
that appeared in the June 1970 issue of Popular Electronics magazine. Your answers
to questions will determine whether you are a truly cool technophile, or you are just a maniacal
misanthrope who happens to know something about radios and regulations. This would probably
have been more aptly printed two issues earlier as an April Fools' joke.
Please Welcome Fast Circuits
As a New RF Cafe Supporter!
Circuits has been providing since 2009 high-quality
PCB manufacturing and fabrication
services to U.S. and Canadian clients. Our fabrication facilities give us the capability of
such as FR4, high temp FR4, Rogers high frequency, heavy copper, and high density. We also
have expertise at delivering impedance control, buried & blind vias, and multiple layered
PCBs. Our assembly services in SMT and PTH capabilities are popular with overseas clients
who seek a low cost, high quality and fast turnaround time.
Z-Comm Intros Low Phase
Noise 11.8 GHz Synthesizer
announces a new RoHS compliant Fixed Frequency Synthesizer model
SFS11800C-LF in the X-band. The SFS11800C-LF is a single frequency synthesizer that operates
at 11.8 GHz with a 10 MHz reference and features a typical phase noise of -90 dBc/Hz
and -120 dBc/Hz at the 10 kHz and 100 kHz offsets, respectively. The SFS11800C-LF
is designed to deliver a typical output power of 3 dBm with a VCO voltage supply of 5 Vdc
while drawing 90 mA...
(Your purchase helps support RF Cafe)
of RF and Microwave Transistor Amplifiers, by Inder Bahl. A comprehensive and up-to-date
treatment of RF and microwave transistor amplifiers. This book provides state-of-the-art coverage
of RF and microwave transistor amplifiers, including low-noise, narrowband, broadband, linear,
high-power, high-efficiency, and high-voltage. Topics covered include modeling, analysis,
design, packaging, and thermal and fabrication considerations. Through a unique integration
of theory and practice, readers will learn to solve amplifier-related design problems ranging
from matching networks to biasing and stability.
and Their Allocation
Radio News was published bi-monthly by the folks at the
National Radio Institute (NRI). NRI used to be a major training
center for electronics technicians beginning in the early part of the 20th century. This article
was provided for them by the FCC as a synopsis of radio frequency spectrum allocations at
the time. Compare a 1940 spectrum allocation chart (just a simple description
here) to one for 2014 and you will see a remarkable difference in not just the number
of bands, but in the extension of the frequency range...
A Yell from an XYL
amateur operators know that "YL" is Hamese for "young lady," meaning a female operator. Less
well known these days is "XYL"
which decades ago, referred to an ex-young lady, implying either an older woman or the wife
of a Ham. According to online call sign lookup services, Popular Electronics'
poet laureate K8AOU was in fact a YL; the call sign was later assigned to an OM
("old man;" i.e., male operator).
AWR Presents & Exhibits
at EDICON 2014
will be presenting and demonstrating its soon-to-be released V11 NI AWR Design Environment™
EDICON 2014 in Beijing, China starting April 8 and running through April 10, 2014. V11,
the first major software release in 2014, includes new features, functionality and enhancements
to Microwave Office/Analog Office circuit design software, Visual System Simulator, AXIEM
3D EM, and Analyst™ 3D FEM EM software. Demonstrations within booth #301...
"Conquer Radio Frequency"
and microwave engineering has been aptly described as a "black art." Even for those who have
a deep understanding of the concepts, there is still an element of mystery involved, particularly
when it comes to troubleshooting misbehaved circuits or systems. When frequencies are high
and wavelengths are so short that everything conductive becomes an antenna absorbing and conducting
or reflecting signals elsewhere, tracking down a source can be like feeling you way around
a house of mirrors at an amusement park while looking for the exit. Fortunately, someone like
Francesco Fornetti, at Explore RF,
not only grasps the concepts but also has the ability to develop...
Many Thanks to Nortec RF
for Continued Support!
RF has more than 22 years of experience designing
power combiners and dividers, directional
and filters. Our research and development group and engineering team constantly introduces
new, top of the line products into our product line. Custom designs on request.
Helleroy Needs an RF Engineer
is a startup working on building high-quality waterproof audio systems for extreme watersports
(e.g. surfing, kayaking or sailing). Currently, we're just 3
people - an award-winning industrial
and graduates from Harvard and uPenn. Our mission is to enable people to have next-level experiences
on the water through music. So far we've built and tested a series of prototypes and have
build a large pre-sales list. As an
you will be involved in all stages of engineering from R&D to DFM.
NOTE: The schedule begins in April, so do not delay if you are
Notable Tech Quote
spoils numbers faster than arithmetic!" - Peppermint Patty, from the Peanuts comic strip by
Charles M. Schulz. The
Peanuts comic strip has been a lifelong favorite of mine.
Your Dream Home
on Michigan's Long Lake
you looking for a quality starter home, retirement home, vacation home, or a home for a small
family? This home has quality construction that includes a maintenance-free full brick facing
from the ground up to the soffits, all the way around. Windows are double paned and airtight.
R-45 insulation in the attic keeps heating bills at a minimum as does the metered gas supply
for the furnace and water heater. That, and sitting on 1.28 flat acres with beautiful trees,
on a private road 100' from the main highway,
deeded access to a boat launching area on Long Lake, a large 2-story pole barn, with boat/camper
storage, topped off by great neighbors, makes this estate an ideal choice for your lifestyle.
Low taxes, very high speed cable Internet are a bonus to boot. SimpliSafe alarm installed.
Crossword for April 6, 2014
have no idea whether the
science themed crossword puzzles I have created every Sunday for the last decade are worked
by anyone. Occasionally, an editor from an engineering school newsletter will ask for permission
to reprint one, or some company might ask to include one in a corporate email, but other than
that, I usually do not receive any feedback. Please let me know if you have ever worked one
of my custom-made crosswords. Thanks.
Hobnobbing with Harbaugh:
5 Wanted Household Inventions
To top off your good fortune, here is a little levity from the "Hobnobbing
with Harbaugh" series of comics that appeared in Popular Electronics. Unfortunately,
none of the "The 5 Most Wanted Household Inventions" have come to full fruition in the marketplace
yet, although the Conversation Jammer 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...
Free White Papers
is a service that offers free
whitepapers and magazine subscriptions to qualifying engineers and technical professionals.
I have downloaded many over the years and find them to usually be useful. A few turn out to
not be what I wanted, but since they're free, all that was lost was a few moments spent filling
out the form. Here are a few of the trending "hot" topics per TradePub that might be of interest.
Many are geared more toward business and management, but even if you are 100% engineer, it
never hurts to round out your knowledge base a bit and get an insight into how the company
with just about every other type of hobby anymore, creativity and mechanical aptitude is not
much of a necessity if you have money to spend. Heck with all the government handouts these
days, all you need is other people's money. There is such a plethora of options available
for every conceivable need to satisfy whatever degree of complexity you want your hobby to
entail. The back 1/3 of every edition of the ARRL's QST magazine is loaded with advertisements
offering antennas, radios, towers, test equipment, guy wires, insulators, cables, connectors,
soldering stations, semiconductors, tubes, nuts and bolts. It is a wonderful world we live
in if your desire is to engage...
cable has been around and familiar to most of us for as long as we can remember. The advent
of personal computers in the 1980s brought ribbon cable into the homes of millions of people
in the form of the interface to disk drives. In 1957, however, when this news story appeared
in Popular Electronics, ribbon cable, known initially as "tape cable." was just being
introduced to industry. There was also a story on what might have been the first flat panel
display screen, the "Sylvatron," developed by Sylvania. Finally, we have a report on bouncing
Electronics has released new designs for a 825-835 MHz, 870-880 MHz
a 950 MHz cavity bandpass filter, and a 748 MHz surface-mount ceramic bandpass filter . All
can be ordered directly through their AMCrf
archive of 2014 press releases
has been created to help if you recall seeing something but do not remember exactly when or
by whom. These press releases were either submitted by the manufacturers or I created them
on request based on information on the companies' websites. If I create them, the format is
my copyright and cannot be distributed to other media outlets. I strongly encourage you
to write and submit your own press releases. Due to time availability, I am currently posting
press releases only for advertisers, but occasionally I do so others as well, particularly
for upstart companies.
two intrepid techno-sleuths are in college by now, but that does not keep them from applying
mystery solving skills to hometown situations while on spring break. The boys invoke the
scientific method of Mr. R.R. Dibble, a New Zealand scientist, to help prove to county commissioners
that a certain part of their critical infrastructure was in need of repair. An nth-generation
farmer's observation was not proof enough, so indisputable empirical data would be needed.
Real-life inventors and company's unique instruments are often incorporated into the
Carl & Jerry series that ran for many years in Popular Electronics.
month, as an advertising promotion, American radio Supply is giving away an
Alinco DR135T 2-meter mobile transceiver to a lucky ham radio operator. No purchased
registration is required. At American Radio Supply we recognize the importance of amateur
radio operators and the valuable service they render to the public. As a token of our appreciation
we give away an amateur radio each month to a licensed amateur radio operator. To enter our
to Mr. David L., of High Point, NC, the latest RF Cafe
Book Drawing winner for March 2014. David
Digital Front-End in Wireless Communications and Broadcasting: Circuits and Signal Processing,
by Fa-Long Luo. The book was graciously provided by
Cambridge University Press.
Rockwell wrote a 4-part series on station design for long distance (DX)
communications that covered antenna selection and siting (Part
I), economics and construction (Part
II), station configuration and receiver topics (Part
III), and propagation quirks and operating tips (Part
IV). This is part III, and discusses topics such as Receiver preamplification,
preselectivity and matching.
announces a new RoHS compliant fixed frequency synthesizer model
SFS10625E-LF is a single frequency PLL solution that is pre-programmed to operate at 10.625 GHz.
This fixed frequency device utilizes ceramic resonator topology to achieve integrated RMS
noise performance of better than 0.4° while consuming less than 500 mW of power. It is
designed to operate over the temperature range of -30 to +70°C and delivers +3 dBm of
output power into a 50 Ω load. Package measure 1.0 x 1.0 x 0.22 in.
article by Joshua Fruchter, writing for
IMS ExpertServices, tells an interesting tale of what can happen when a powerful megacorporation,
in this case Apple Computer, decides
match wits with a 10-year-old child prodigy who, by no coincidence, was named
Dilbert by his adoring engineer father. The few minutes it will take you to read will
leave you with a sense that yes, there is still a bit of sanity remaining in today's court
Daubert, for the uninitiated, is a landmark legal decision regarding expert testimony
in damage liability litigation.
PS-360-DC-3 OPTION 618-15D is an 8-bit, digitally controlled phase shifter operating from
the 6.0 to 18.0 GHz. frequency range. This unit has a typical insertion loss of 10 dB,
accuracy of ±15°, switching speed of 500 ns maximum, and a VWSR of 2.0:1 maximum. It
is supplied with removable SMA(F) connectors in a housing measuring 1.6" x 1.75" x 0.5".
distinguishes the Western Electric 8A airplane receiver." That statement describes a 160-pound
system that included a wind-driven electricity generator for the equipment used by Captain
Frank M. Hawks when setting coast-to-coast time records in the year 1929 using his
Lockheed Air Express airplane, dubbed "Texaco 5." A simple 4-tube AM radio, its chassis
measured a whopping 6" x 10" x 12". There were no radio direction finding stations enroute
at the time, so the radio's usefulness was limited to being "comforting to listen in every
half-hour and be advised of general conditions...
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