Today in Science History -
This installment of "Stereo
Scene" was the 12th in a series run by Popular Electronics magazine
in the early 1970s. As mentioned previously, stereo equipment was a big deal in
the 1960s and 1970s. Amazingly - or maybe not amazingly - some of the issues of
the day have persisted through today's audiophile community. One of the most fervently
debated topic is whether audio power amplifiers that use vacuum tubes produce higher
quality sound than do transistorized power amplifiers. The pro-tube argument holds
that the physical flow of electrons and the ability of metal internal components
to vibrate microscopically in response to signals imparts a quality to the output
that rigid semiconductors cannot. Many attempts at designing circuits to artificially
add such "quality" to transistorized amplifiers ...
Lockheed Martin recognized 27 small business
suppliers that made exemplary contributions to its Missiles and Fire Control business
area's products and services in 2018.
Custom MMIC received an award for their exemplary work in helping Lockheed Martin
deliver crucial missions to their customers. Paul Blount, President and CEO of Custom
MMIC, and Charlie Trantanella, Chief Scientist, attended the award ceremony and
accepted the award on behalf of the Custom MMIC team. "We are excited and honored
to have been selected for this prestigious award from Lockheed Martin ...
Radio & Television News ran
a two-part article on the state of the art of computers in the late 1950s (this
is part 1). It had only been since ENIAC's (Electronic
Numerical Integrator And Computer) debut in 1946 at Massachusetts Institute
of Technology (MIT) that the public (or science community for that matter) was getting
used to regularly hearing about computers in the news. By 1957 there were many companies
popping up with electronic computer offerings. Originally the exclusive purview
of university research labs and defense installations, the size and cost of computers
was moving into the realm of affordability by corporations that used them for accounting
and bookkeeping, and in some cases even rented idle time to outside users. Desktop
PCs and notebook computers were still the realm of crazy dreamers ...
Mr. Mike Kappes, of IQ−Analog Corporation,
has an article in Microwave Journal entitled, "All-Digital Antennas for mmWave Systems." It
begins: "To realize high performance mmWave communications, beamforming antenna
systems will need to be smarter, faster, smaller, lower power, cost less, have lower
latency and be easier to integrate than current technologies. Much like with previous
telecommunication systems, integrating important processing and signal conditioning
functions will enable more cost-effective and compact mmWave beamforming antennas.
The development of complex mmWave RF and analog hardware for 5G ..."
"The U.S. Army is researching how to leverage
smart cities of the future where networks of sensors will be used to enable services
for civilian and government use, such as environmental monitoring or traffic flow
optimization. Smart city environments have emerged from continued growth in
urban internet of things, or IoT, infrastructure,
where devices connect to the web, integrate capabilities and use data analytics
to extract meaningful information. Researchers at the U.S. Army Combat Capabilities
Development Command's Army Research Laboratory, the Army's corporate research laboratory
also known as ARL, are investigating how IoT could complement the capabilities of
military assets in urban operations ..."
At VidaRF, the phrase 'Providing Simple
Solutions for Complex Connections' is more than just a slogan – it's a mindset,
a mission, and a driving force behind everything we do. Their pledge is to design
and distribute high performance, cost effective
products to fit each customer's unique applications. Please visit VidaRF today
to see how their lines of attenuators & terminations, directional couplers,
power dividers, coaxial connectors, and circulator & isolators can be of use
to your project. "When the standard just will not do, VidaRF has the solution for
When you read about price wars in the
integrated circuit (IC) realm, you naturally think of manufacturers in Asian
countries, since even the products of American companies are made overseas nowadays
(unfortunately). Such was not the case in the early days of ICs when corporations
kept their trade secrets within the shores of their home countries, and government
technology export laws prohibited practices that would have required processing
knowledge and equipment to be located offshore in order to be successful. In the
1960s, it was companies like Fairchild, Clevite, Motorola, Texas Instruments, IBM,
Westinghouse, General Electric, et al, who were in fierce competition to dominate
the semiconductor markets. Lead design engineers and scientists were offered significant
salary and benefit deals to bring their expertise onboard. Magazine articles of
the era ...
Triad RF Systems designs and manufactures
RF power amplifiers
and systems. Triad RF Systems comprises three partners
(hence 'Triad') with over 40 years of accumulated
knowledge of what is required to design, manufacture, market, sell and service RF/Microwave
amplifiers and amplifier systems. PA, LNA, bi-directional, and frequency translating
amplifiers are available, in formats including tower mount, benchtop, rack mount,
and chassis mount. "We view Triad more as a technology partner than a vendor for
our line-of-sight communications product line." Please check to see how we can help
your project ...
Please check to see how they can help your project.
Keysight Technologies is conducting a free
webinar on June 26, 2019, 1:00 p.m. ET entitled, "Get More Out of Your Instrument with FPGAs." Planned speakers
are Eric Wilson, R&D engineer, Brian Durwood, planner for PathWave FPGA, and
Dr. John Guilford, R&D engineer, and Eddie Rodriguez, real-time software
architect. "FPGA enabled arbitrary waveform generators, digitizers and DSP modules
offer new levels of control and customization that can shave months off of prototyping
your high frequency project. Join us to learn how to program these instruments and
insert your custom logic, in-line with the signal ..."
is ground the world around," is an oft repeated saying when talking about making
electrical connections to Earth ground. In a general sense that is true, especially
when referring to electromagnetic radio signals and antenna systems that are in
some manner dependent on the common connection. However, when you are working within
the confines of a localized electronic circuit such as on a printed circuit board
or inside a chassis, there is no guarantee that without proper precautions ground
is not at the same potential everywhere. Poor (high impedance) soldered, crimped,
and bolted connections are among the prime offenders that cause voltage differentials
to arise between points intended to be equipotential. RF frequency signals are particularly
sensitive to even a minor divergence ...
PCB Directory is the largest directory of Printed Circuit Board (PCB) Manufacturers,
Assembly houses, and Design Services on the Internet. We have listed the leading
printed circuit board manufacturers around the world and made them searchable by
their capabilities - Number of laminates used, Board thicknesses supported, Number
of layers supported, Types of substrates (e.g., material, flexible, rigid), Geographical
location, and more.
"The US Department of Transportation put
out an announcement of the 3rd of June informing companies that they are looking
to conduct field demonstrations of technologies capable of providing backup and/or
complementary positioning, navigation, and timing (PNT) in the event of a temporary
disruption to GPS. In response to this Globalstar and Echo Ridge
have informed the U.S. Department of Transportation that the companies have developed
and are prepared to participate in and support a live field demonstration of a stand-alone
positioning, navigation, and timing (PNT) capability that can provide accurate and
reliable PNT services ..."
RF Superstore launched in 2017, marking
the return of Murray Pasternack, founder of Pasternack Enterprises, to the RF and
microwave Industry. Pasternack fundamentally changed the way RF components were
sold. Partner Jason Wright manages day-to-day operations, while working closely
with Mr. Pasternack to develop RF Superstore into a world class RF and
component supplier. RF coaxial connectors & adapters, coaxial cable &
cable assemblies, surge protectors, attenuators. Items added daily. Free shipping
on orders over $99. We're leading the way again!
From the mid 1950s and through mid 1970s,
Popular Electronics magazine ran a series of articles entitled "Solid State"
in order to facilitate the electronics industry's effort to move people from vacuum
tubes to semiconductors. In fact, if Solid State ran every months since its beginning,
this being installment 182 means it began in 1956 - just eight years after the transistor
was invented. Even though the commercial industry had already shifted to almost
exclusively transistorized products, a large part of the consumer base had been
raised on tube radios and televisions. In this case, the news is in regard to Bell
Telephone Labs' recent invention of the
semiconductor charge coupled device (CCD) - the heart of all modern imaging
systems. Prior to the CCD, a vidicon tube, which as the name ...
ConductRF offer RF Engineers a large selection
Hi Flex cables for RF vector network analyzers (VNAs). We have standards for
applications at 18-40 GHz, 50 GHz & 70 GHz. Our torque resistant
connector heads and phase stable constructions ensure great performance for many
tests to come. Other key features include: 2.92 mm, 2.4 mm & 1.85 mm
connector options, low VSWR & insertion loss, low phase change with flexing,
options available swept right angle connectors ...
You don't see jobs advertisements like this
anymore. Here is an ad that appeared in the the July 1944 edition of QST
(the American Radio Relay League's, ARRL's, monthly magazine), placed by
Company (now just Raytheon Company), looking for tube design, test, and processing
engineers. Licensed amateur radio operators were in high demand during the war years
because of their knowledge and enthusiasm for electronics and wireless communications.
I hope you didn't come to this page hoping to really find a tube designer job available.
Of course, there are still vacuum tubes being designed for TWTs and magnetrons,
but those are few and far between ...
San Francisco Components (SFC), a recognized
leader in Printed Circuit Board (PCB) fabrication, assembly, and testing, is now
PCB testing and inspection capabilities to its customers, further ensuring high-yield
PCBs that meet rigid design and performance specifications across all applications
and industries. San Francisco Circuits offers PCB testing for Bare Boards (before
the board is assembled) and Assembled Boards (once the board is assembled), that
will detect and minimize issues that would affect performance. "PCBs need to be
tested early in the design and production phases in order to control component tolerances,
"U.S. Navy communications experts plan to
approach industry for a prototype low-power secure military cell phone network for
warfighters operating on the forward edge of the battlefield. Officials of the Naval
Information Warfare Center (NIWC) Atlantic in North Charleston, S.C., issued a planning
document on Tuesday (N65236-19-R-T006) for two initiatives in the Information Warfare
Research Project (IWRP). Solicitations for these projects should be released around
25 June 2019. The first project, called Tactical Microcell (19-LANT-0072), seeks
to develop a military ground microcell for forward-deployed warfighters that uses
software-defined radios to create communications microcells ..."
Reactel has become one of the industry leaders
in the design and manufacture of RF and microwave filters, diplexers, and sub-assemblies. Through
a continuous process of research and development, they have established a full line
of filters of all types - lowpass, highpass, bandpass, bandstop, diplexer, and more.
They offer the generally known tubular, LC, cavity, and waveguide designs, as well
as state of the art high performance suspended substrate models. Established in
1979. Please contact Reactel today to see how they might help your project.
Since 2000, I have been creating custom engineering-
science-themed crossword puzzles for the brain-exercising benefit and pleasure
of RF Cafe visitors who are fellow cruciverbalists. The jury is out on whether or
not this type of mental challenge helps keep your gray matter from atrophying in
old age, but it certainly helps maintain your vocabulary and cognitive skills at
all ages. A database of thousands of words has been built up over the years and
contains only clues and terms associated with engineering, science, physical, astronomy,
mathematics, chemistry, etc. You will never find a word taxing your knowledge of
a numbnut soap opera star or the name of some obscure village in the Andes mountains.
You might, however ...
According to Electronics
magazine editor Lewis Young in mid-1964, the industry was entering into a slump
in business opportunities. The boom times provided during the war years of WWII
and Korea had resulted in, according to Mr. Young, a lax attitude toward operational
strategy that led to wasteful spending and poor accountability for project results.
It wasn't just the defense contractors' fault because government bureaucrats - from
relatively low ranking military personnel to elected lawmakers - had (have) a habit
of making sudden changes to contract requirements. Maintaining the resources needed
to keep up with ever-evolving demands necessitated a lot of the excess. Fortunately,
the military-industrial complex, as President Dwight D. Eisenhower dubbed it,
was on the verge of being thrown another huge monetary bone - the Vietnam War. President
Kennedy was already pumping lots of equipment and manpower into it, and LBJ would
follow suit with vigor ...