See Page 1 |
2 |
3 |
4 | of the July 2023 homepage archives. Friday the 7th
 All three questions in the May 1964
Radio-Electronics magazine "What's
Your EQ?" challenge should not be too difficult for most RF Cafe visitors. EQ,
by the way, stands for "Electronics Quotient." For the first one, you might want
to make use of the Delta-Wye converter in the newly released (and free) Espresso
Engineering Workbook™. With the Voltage Divider, don't bother trying to write multiple
equations in multiple unknowns. By inspection you can deduce what the voltage drop
across the 2.5 kΩ resistor are, then knowing that the current through all resistors
is the same, figure out the required values of R1 and R3. Finally, sum all the resistances
and multiply by the current. Done. I have to admit to not getting the Doodle answer.
If I had time, I'd do the oscilloscope thing to verify the author's solution...
 Axiom Test Equipment, an electronic test
equipment rental and sales company has published a new blog post entitled "Spectrum
Analyzers Help Find Harmful Interference," that helps users find a spectrum
analyzer with the functionality needed to simplify interference hunting in a desired
frequency range. The growing number of wireless applications and signals creates
increased opportunities for interference when signals are not properly monitored.
When interference does take place, it degrades system performance and inevitably
must be detected and eliminated. This requires spectrum monitoring and interference
hunting with the right tools and the best equipment for that job is the spectrum
analyzer. With a spectrum or signal analyzer teamed with a suitable antenna, it
is usually possible to detect and measure a source of RF interference. By measuring
as many as the signals within a frequency range of interest, such as around 2.4 GHz
for Bluetooth and wireless local area network (WLAN) signals and any additional,
unwanted signals, potential interference can be detected and displayed with a spectrum
analyzer...
 "Seventy years ago in May, the 5 microhenry
line impedance stabilization network (LISN) made its debut in MIL‑I‑6181B.2.
Aside from the EMI receiver itself, the LISN is one of the oldest and most successful
pieces of EMI test equipment in existence. And while EMI receivers have changed
a great deal since 1953, the 5 μH LISN is not only still with us, but almost
unchanged and used in commercial aviation and the automotive industry, as well as
military applications worldwide. Other LISNs have come and gone, and others are
with us still. The way we use LISNs has changed over time, not always for the better.
But the LISN is here to stay in the world of EMI testing. In the beginning, radio
receivers used on WWII Army aircraft were quite susceptible to very low levels of
noise on their primary (28 Vdc) power input. Further, unshielded antenna lead-ins
were very susceptible to capacitive crosstalk from noisy 28 Vdc electrical
power feeds. The first EMI standards tried to control both these radio frequency
interference (RFI) coupling paths. Prior to 1953, JAN-I-2255 used a pair of 4 μF
bypass capacitors in shunt (8 μF total capacity between power feeder and ground
plane) and a 10' length of power wire suspended not more than ¼" from the ground
plane..."
 I still use wired Ethernet to my computer.
"Ethernet
is the backbone of our connected world and 2023 marks the 50th anniversary of this
pervasive technology. The efficiency and resiliency of Ethernet makes it applicable
to a broad set of applications, increasing the importance of interoperability. One
overarching tenet of the Ethernet Alliance's mission is the proliferation of interoperability
for the wide range of devices, interconnect solutions, and data rates within the
Ethernet ecosystem. The basic network components haven't really changed; with each
advancement of speed, we're still testing switches, systems, and network interface
cards (NICs) connected with cables and optical modules. However - and under the
covers, so to speak - there's been an explosion of applications centered on, and
anchored by, Ethernet's communications frameworks..."
 This schematic diagram and parts list for
the
Truetone model D2616 radio was published in the November 1946 issue of Radio
News magazine. It is a very modern (at the time) tabletop design sporting a smooth,
shiny white phenolic chassis, equipped with Truetone Stratoscope technology. Both
RCA and Hazeltine patents are noted. Truetone was the branded name used by Western
Auto. The photos here are from a recent eBay auction where the winner paid a mere
$79.99 (I have Archive.org save the page for the sake of posterity). It is in incredibly
good condition for an 80 year old radio that does not appear to have been reconditioned.
There are still many people who restore and service these vintage radios, and often
it can be difficult or impossible to find schematics and/or tuning information.
I will keep a running list of all data sheets to facilitate a search...
 It was a lot of work, but I finally finished
a version of the "RF & Electronics Schematic & Block Diagram Symbols"" that
works well with Microsoft Office™ programs Word™, Excel™, and Power Point™.
This is an equivalent of the extensive set of amplifier, mixer, filter, switch,
connector, waveguide, digital, analog, antenna, and other commonly used symbols
for system block diagrams and schematics created for Visio™. Each of the 1,000 or
so symbols was exported individually from Visio in the EMF file format, then imported
into Word on a Drawing Canvas. The EMF format allows an image to be scaled up or
down without becoming pixelated, so all the shapes can be resized in a document
and still look good. The imported symbols can also be UnGrouped into their original
constituent parts for editing. Check them out!
 Withwave manufactures an extensive line
of metrology quality coaxial test cable assemblies, connectors (wave-, end-, vertical-launch,
board edge, panel mount), calibration kits (SOLT), a
fully automated
4-port vector network analyzer (VNA) calibrator, between- and in-series connector
adaptors, attenuators, terminations, DC blocks, torque wrenches, test probes &
probe positioner. Special test fixtures for calibration and multicoax cable assemblies.
Frequency ranges from DC through 110 GHz. Please contact Withwave today to
see how they can help your project succeed.
Thursday the 6th
 Radar, as with a lot of (probably most of)
technology that once was the purview of military, government, university, and corporate
entities due to size, complexity, and cost, now is integrated into many consumer
products. Boaters and even private aviation pilots have benefitted from radar for
decades, at ever increasing levels of capability and often decreasing cost. Your
car is one of the biggest beneficiaries of modern radar if it has back-up sensors,
lane keeper-inner, low visibility assistance, collision avoidance, and other functions.
A mix of short-range, medium-range, and long-range radar, in conjunction with lidar
and sonar, is utilized to implement the big scheme dubbed Advanced Driver Assistance
Systems (ADAS). Self-driving cars are utterly dependent on all these technologies.
This "Principle
of Modern Radar" article form a 1960 issue of Radio-Electronics magazine
is a good summary on where the transition to commercialization began...
 "The NFC Forum, the leading standards body
for
Near Field Communication (NFC) technology, announced today that it has unveiled
its Technology Roadmap outlining key plans and research efforts through 2028. This
comprehensive roadmap includes five key initiatives and offers a unique glimpse
into the future of NFC, highlighting the technology's direction and anticipated
product development, market, and business opportunities for the next two to five
years. The Technology Roadmap will be presented by a panel of Forum senior leaders
during a public webinar on June 27, 2023, at 9:00 a.m. Eastern. The technology roadmap
was collaboratively developed by leading Forum members, including Board representatives
from Apple, Google, Huawei, Identiv, Infineon, NXP, Qualcomm, Sony, and STMicroelectronics
as well as the Forum's 400-member company community..."
 Millimeter waves (mm-waves) are the subject
of a great many articles today describing advances being made in the part of the
spectrum above 30 GHz (Ka and EHF bands, mm-wave); however, when this piece
was published in 1935, it was
decimeter waves - what is now referred to as UHF - that were the big to-do.
Crowded frequency bands have been a problem since the beginning of radio because
technology is constantly not only filling available bandwidth, but also pushing
the frontiers higher. The advantage of going higher in frequency is that required
bandwidths for existing modulation schemes represent a smaller percentage of the
center frequency. For example, an 802.11b WiFi signal's 22 MHz bandwidth represents
roughly 1% of its 2.4 MHz center frequency. 802.11a does 20 MHz at 5 GHz
for 0.4%. Extend that center frequency up to 50 GHz and the channel occupancy
is a mere 0.04%. That means for the same total band occupancy of 1% as with 802.11b,
you can fit in 25 equivalent slots. The problem with going higher in frequency is
that components are typically more costly and trickier to implement, and the power
falls off faster with distance according to the familiar Friis equation...
 The first major new release of RF Cafe's
spreadsheet (Excel) based engineering and science calculator is now available -
Espresso Engineering Workbook™. Since 2002, the original Calculator Workbook
has been available as a free download. Continuing the tradition, RF Cafe Espresso
Engineering Workbook™ is also provided at
no cost, compliments of my generous sponsors. The original
calculators are included, but with a vastly expanded and improved user interface.
Error-trapped user input cells help prevent entry of invalid values. An extensive
use of Visual Basic for Applications (VBA) functions now do most of the heavy lifting
with calculations, and facilitates a wide user-selectable choice of units for voltage,
frequency, speed, temperature, power, wavelength, weight, etc. In fact, a full page
of units conversion calculators is included. A particularly handy feature is the
ability to specify the the number of significant digits to display. Drop-down menus
are provided for convenience. Now that a more expandable basis has been created,
I plan to add new calculators on a regular basis...
 Werbel Microwave presents an impressive
array of features in our latest offering. With a wide frequency range spanning from
0.5 to 2 GHz, the
C-1002-20 directional coupler stands out for its exceptional performance across
the 0.5 to 2 GHz frequency range. This coupler boasts excellent coupling flatness,
good directivity, and high power handling capabilities. It is the perfect choice
for a wide range of applications, including lab testing and power monitoring over
broad frequency bands. The key features of the C-1002-20 coupler offer significant
advantages. Its wide bandwidth eliminates the need for component switching in lab
testing, as it covers the desired frequency range. With a high directivity of 30 dB
(typ.) up to 2 GHz, the coupler allows accurate sampling of input powers while
minimizing the impact of output mismatches. Additionally, its excellent return loss
of 30 dB (typ.) up to 2 GHz ensures minimal undesired reflections and
amplitude ripple...
 Prior to the big push for
leadless solder in the 1990s, probably 99% or more of the solder used by industry,
tradesmen, and hobbyists contained lead. The 60/40 Sn-Pb (and 63/47) alloy, both
with and without a rosin core, was used for electrical work, electronics, plumbing,
copper guttering, radiators, and many mechanical assemblies made of steel, brass,
copper, tin, etc. Between World War I, "The War to [Not] End All Wars," and
World War II, the electronics industry exploded in growth. All realms of society
and government became utterly dependent on products assembled using solder. Both
tin and lead were abundantly available, making it inexpensive. Properties of Sn-Pb
solder were well known, and methods for is use were simple. At the breakout of WWII,
America's main source for tin was a group of countries under the control of Japanese
forces. As with a lot of other resources during wartime, tin was regulated and meted
out by the government...
 With more than 1000
custom-built stencils, this has got to be the most comprehensive set of
Visio Stencils available for RF, analog, and digital system and schematic
drawings! Every stencil symbol has been built to fit proportionally on the included
A-, B-, and C-size drawing page templates (or use your own page if preferred). Components
are provided for system block diagrams, conceptual drawings, schematics, test equipment,
racks (EIA 19", ETSI 21"), and more. Test equipment and racks are built at a 1:1
scale so that measurements can be made directly using Visio built-in dimensioning
objects. Page templates are provided with a preset scale (changeable) for a good
presentation that can incorporate all provided symbols...
 The leading website for the PCB industry.
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 (FR-4, Rogers, flexible, rigid), Geographical
location (U.S., China), kinds of services (manufacturing, fabrication, assembly,
prototype), and more. Fast turn-around on quotations for PCB fabrication and assembly.
Wednesday the 5th
 When this "Around
the World in 80 Seconds" editorial was published by Radio-Electronics
magazine editor Hugo Gernsback in 1960, the Cold War was reaching a crescendo level.
Iron Curtain countries were saber rattling about imminent nuclear strikes against
Capitalist Pig entities like the United States and Western Europe. Movies, books,
and newspaper and magazine articles by the scores were produced to warn the public
about the potential for mutual assured destruction between nuclear armed countries.
At the time, that included the U.S., Russia, the UK, and France had at least performed
nuclear detonations, then China in 1964. 1962 was the year of the Cuban Missile
Crisis. This article extols the capabilities of the Strategic Air Command's worldwide
communication capabilities as witnessed personally by Mr. Gernsback during
a publicity demonstration. Of the three branches involved, land-based (telephone)
comms was declared to be 99% reliable, narrowband radio rated 95% reliability...
 "China has imposed export curbs on two metals
used in computer chips and solar cells, expanding a squabble with Washington over
high-tech trade ahead of Treasury Secretary Janet Yellen's visit to Beijing this
week. The
controls on gallium and germanium are intended to 'safeguard national security,'
the Commerce Ministry said late Monday. Chinese leader Xi Jinping's government is
frustrated by U.S. curbs on access to advanced processor chips and other technology
on security grounds. But Beijing has been slow to retaliate, possibly to avoid disrupting
China's fledgling developers of chips, artificial intelligence and other technology.
China is the biggest global source of gallium and germanium. The U.S. gets about
half its supply of both metals directly from China. Yellen is due to arrive as part
of efforts by the Biden administration to revive relations that have plunged to
their lowest level in decades..."
 This article in a 1966 issue of Popular
Electronics magazine presents a surprising and maybe even counterintuitive
(to those uninitiated in antenna physics) result when measuring the radiation pattern
of a
CB-type antenna mounted at various points on a car. If you were asked to make
a rough sketch of the radiation pattern when the antenna is mounted in the center
of the roof, center of the trunk, and on each of the front and rear and left and
right fenders, would yours look like those in the article (assuming an all-metal
car)? Today, there are many electromagnetic radiation pattern simulators available
to help predict antenna performance in just about any scenario imaginable. Design
verification is then usually performed either in actual operational conditions,
in anechoic chambers, in TEM cells, or on outdoor test sites. Being able to accomplish
the initial simulation using highly refined software algorithms can save huge amounts
of money and time, just as with circuit simulation and PCB / enclosure layout...
 San Francisco Circuits, a popular provider
of PCB fabrication and assembly, has published a
PCB Insertion Loss Guide. The term "Insertion loss" typically refers to the
loss of signal strength as it passes through system-level cabling / components and
PCB-level traces within high-speed (3 GHz+) systems / optical fibers and PCB
stack-ups. When designing new PCBs, it's important to mitigate loss, typically expressed
in decibels (dB), as it can lead to critical system failures if left unchecked.
San Francisco Circuits has created a new resource to assist PCB designers with the
best practices surrounding PCB Insertion loss. The causes and contributors to insertion
loss include overall transmission length, connectors & cables, high-loss materials,
and higher frequency systems. How each affects a system overall along with tips
on how to combat insertion loss are detailed...
 Technology advancement has always been about
research and development in all fields related to the concept, be it any combination
of mechanical, electrical, programming, implementation, usage, or training. Television
went fundamentally unchanged from the time of its commercial implementation in the
early part of the last century until the advent of plasma screens (i.e., no more
raster-scanned CRTs) in the latter part of the last century. Color tubes added complexity
to the signal, but it was still an analog signal. Then came digital broadcasting
in the early part of this century. The same sort of evolution occurred with telephones
and to some extent with radio. This
Television I.Q. Quiz from a 1948 edition of Radio & Television
News magazine will give you some insight into how TVs used to work...
 Banner Ads are rotated in all locations
on the page! RF Cafe typically receives 8,000-15,000 website visits
each weekday.
RF Cafe is a favorite
of engineers, technicians, hobbyists, and students all over the world. With more
than 17,000 pages in the Google search index, RF Cafe returns in favorable
positions on many types of key searches, both for text and images.
Your 728x90-px and 160x600-px Banner Ads are displayed
on average 225,000 times per year! New content is added on a daily basis,
which keeps the major search engines interested enough to spider it multiple times
each day. Items added on the homepage often can be found in a Google search within
a few hours of being posted. If you need your company news to be seen, RF Cafe is the place to be...
 Empower RF Systems is the technological
leader in RF & microwave power amplifier solutions for EW, Radar, Satcom, Threat
Simulation, Communications, and Product Testing. Our air and liquid cooled amplifiers
incorporate the latest semiconductor and power combining technologies and with a
patented architecture we build the most sophisticated and flexible COTS system amplifiers
in the world. Solutions range from tens of watts to hundreds of kilowatts and includes
basic PA modules to scalable rack systems.
Tuesday the 4th
 There's no hiinggthe truth about how well
I did - or didn't do - on this "the truth about how well I did - or didn't do -
on this "R-E
Puzzler" from the October 1967 issue of Radio-Electronics magazine, because
contrary to the publisher's promise, a solution was never published in a later issue
(I looked for it in the six subsequent issues and could not find it). Therefore,
the R-E Puzzler Solution posted at the bottom of this page shows the answers I was
able to figure out which, embarrassingly, results in a score of only 17/25 = 68%.
I'm pretty confident of being able to get all of them if I spent more time, but
that's it for about 30 minutes worth of cogitating. If you know more of the words,
please send me an e-mail and I'll add them to the solution. Thanks...
 Microwave Journal ran a piece in the June
issue entitled, "InP
HBT Technology: Advantages, Applications and Future Challenges." To be honest,
the article itself didn't interest me all that much, but there is a nice graph within
that plots signal atmospheric attenuation levels up through 400 GHz, which
is relevant because G-Band, which is the currently targeted new realm of spectrum
use, covers 110 to 300 GHz*.
Operations need to exploit the areas with minimal attenuation, which are at 140
and 220 GHz. In the secure satellite communications realm, the opposite is
desirable; frequencies at maximum atmospheric attenuation are used to minimize reception
by Earth-based listeners. 60 GHz has long been the home of spy satellites,
and now that InP and GaN enable operation into G-band, other frequencies can be
exploited. *Today, I spent a couple
hours extracting data points and plotting the newest (2022) "Specific Attenuation Due
to Atmospheric Gases, Calculated at 1 GHz Intervals," which goes all the way
to 1000 GHz (1 THz). I also posted the numeric values of the frequency
and attenuation values used to generate the maximums and minimums of both the "Standard"
and the "Dry" plots...
 If you think the title of this piece, "I Will Not
Bite His Ear, or the Rover Radio Boys on the Moon," has anything to do with
the story, you would be in error ... at least as far as I can reckon there's no
connection. Keep in mind that this mini-novel appeared in the "April Fool" section
of the April 1933 QST magazine issue. I have posted a couple of the "Fools" pieces
which accompanied it (see TOC beginning on page 25). Read with caution. The image
of Queen Elizabeth cradling a vacuum valve (not tube!) under her arm like a rugby
football (to continue the Eurocentric theme) in the comic certainly grabs one's
attention, as do the "250-watter lights" on the the royal bathroom wall. You need
to switch into a early twentieth century mindset while perusing the story in order
to appreciate the humor...
 This assortment of custom-designed themes
by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins,
Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's
Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart."
My "Matchmaker's" design has been ripped off by other people and used on their products,
so please be sure to purchase only official RF Cafe gear. My markup is only a paltry
50¢ per item - Cafe Press gets the rest of your purchase price. These would make
excellent gifts for husbands, wives, kids, significant others, and for handing out
at company events or as rewards for excellent service. It's a great way to help
support RF Cafe. Thanks...
 Anatech Electronics (AEI) manufactures and
supplies RF and microwave filters for military and commercial communication
systems, providing standard LP, HP, BP, BS, notch, diplexer, and custom RF filters,
and RF products. Standard RF filter and cable assembly products are published in
our website database for ease of procurement. Custom RF filters designs are used
when a standard cannot be found, or the requirements dictate a custom approach for
your military and commercial communications needs. Sam Benzacar's monthly newsletters
address contemporary wireless subjects. Please visit Anatech today to see how they
can help your project succeed.
 In CONGRESS, July 4, 1776.
The unanimous
Declaration of the thirteen united States of America, When in the Course of
human events, it becomes necessary for one people to dissolve the political bands
which have connected them with another, and to assume among the powers of the earth,
the separate and equal station to which the Laws of Nature and of Nature's God entitle
them, a decent respect to the opinions of mankind requires that they should declare
the causes which impel them to the separation.
We hold these truths to be self-evident, that
all men are created equal, that they are endowed by their Creator with certain unalienable
Rights, that among these are Life, Liberty and the pursuit of Happiness. -- That
to secure these rights, Governments are instituted among Men, deriving their just
powers from the consent of the governed, -- That whenever any Form of Government
becomes destructive of these ends, it is the Right of the People to alter or to
abolish it, and to institute new Government, laying its foundation on such principles
and organizing its powers in such form, as to them shall seem most likely to effect
their Safety and Happiness. Prudence, indeed, will dictate that Governments
long established should not be changed for light and transient causes; and accordingly
all experience hath shewn, that mankind are more disposed to suffer, while evils
are sufferable, than to right themselves by abolishing the forms to which they are
accustomed. But when a long train of abuses and usurpations, pursuing invariably
the same Object evinces a design to reduce them under absolute Despotism, it is
their right, it is their duty, to throw off such Government, and to provide new
Guards for their future security. -- Such has been the patient sufferance of these
Colonies; and such is now the necessity which constrains them to alter their former
Systems of Government. The history of the present King of Great Britain is a history
of repeated injuries and usurpations, all having in direct object the establishment
of an absolute Tyranny over these States. To prove this, let Facts be submitted
to a candid world...
Monday the 3rd
 Nobody is irreplaceable. That is a common
argument offered in response to an assertion that a particular person is the only
one capable of fulfilling a certain role in business, sports, community, and other
areas. While it is mostly true (except in the case of some personal relationships),
securing the service of that person is capable of filling the figurative shoes of
the contested soul is often difficult or impossible. A more accurate argument might
be that out of the field of people qualified to replace someone in a particular
role, the likelihood of doing so is essentially zero. To my knowledge, nobody ever
uttered any form of that statement regarding me; however, many certainly said it
about
Hugo Gernsback. Except for here on RF Cafe, Mr. Gernsback is not often
mentioned these days, but throughout the first half of the last century, his name
was well known by those with an interest in science, electronics, and science fiction.
This pseudo-eulogy / mini-biography appeared in the October 1967 issue of Radio-Electronics
magazine, which was the last of many publications he founded...
 A fair number of these
Philco Model 38-116 Code 125 floor-sitting console style radios are still in
existence and have been restored by collectors. They appear on eBay and vintage
radio blogs. I have been scanning and posting Radio Service Data Sheets like this
one for many years now. Having two full pages devoted to a single radio like this
from a 1938 issue of Radio-Craft magazine is rare. There are still many people who
restore and service these vintage radios, and often it can be difficult or impossible
to find schematics and/or tuning information. A running list of all data sheets
can be found at the bottom of the page to facilitate a search...
 "Baseball-sized hail took out a solar farm
in Scottsbluff, Nebraska. The hail
shattered most of the panels on the 5.2-megawatt solar project, sparing an odd
panel like missing teeth in a white smile. Wyoming has only one commercial-scale
solar farm, but a second project is under construction south of Cheyenne. The Federal
Emergency Management Agency ranks this area in its the highest category for hail
risk on the national index. Don Day, Cowboy State Daily meteorologist, said the
hail would have reached terminal velocity during its descent, which is the maximum
speed an object will reach when falling. The hail would have likely struck the panels
going 100 to 150 mph..."
 We take wireless communications for granted.
Just as people my age thought pocket-size transistor radios that ran on 9V batteries
were always available, today's kids give no thought to whether there was a time
when everyone did not carry a cellphone around. FM radio, if listened to at all
nowadays, is likely either via an Internet connection or via an embedded FM radio
IC in his/her phone, with ear bud wires acting as an antenna. It is obviously no
big deal, since it always was so. In the early part of the last century most people
did not own any sort of radio - not even a commercial AM broadcast receiver. Having
something as mysterious as a shortwave "rig" was an indication of technical prowess
since many operators built their own equipment from kits or schematics. Participation
in
amateur radio worldwide was huge at the time, which is amazing given the amount
of work required to set up even a relatively simple CW (Morse code) setup. The American
Amateur Radio League (ARRL) published extensive lists of reported contacts (QSLs
in Ham-ese) every couple months. Purely for illustrative purposes, I have posted
all 15 pages of very tiny print as submitted by operators for the April 1932 edition
of QST magazine. The effort required to assimilate and type in all the
names, locations, call signs, etc., was enormous, especially since the info...
RF Cascade Workbook 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...
 Amplifier Solutions Corporation (ASC) is
a manufacturer of amplifiers for commercial & military markets. ASC designs
and manufactures hybrid, surface mount flange, open carrier and connectorized amplifiers
for low, medium and high power applications using Gallium Nitride (GaN), Gallium
Arsenide (GaAs) and Silicon (Si) transistor technologies. ASC's thick film designs
operate in the frequency range of 300 kHz to 6 GHz. ASC offers thin film
designs that operate up to 20 GHz. ASC is located in an 8,000 sq.ft. facility
in the town of Telford, PA. We offer excellent customer support and take pride in
the ability to quickly react to evolving system design requirements.
Sunday the 2nd
 This custom RF Cafe
electronics-themed crossword puzzle for July 2nd contains words and clues which
pertain exclusively to the subjects of electronics, science, physics, mechanics,
engineering, power distribution, astronomy, chemistry, etc. If you do see names
of people or places, they are intimately related to the aforementioned areas of
study. Being that "B" is the 2nd letter of the alphabet, it is used as the first
and/or last letter of many words in today's crossword puzzle - as well as in-between.
Those clues are marked with an asterisk (*). As always, you will find no references
to numbnut movie stars or fashion designers. Need more crossword RF Cafe puzzles?
A list at the bottom of the page links to hundreds of them dating back to the year
2000. Enjoy.
This assortment of custom-designed themes
by RF Cafe includes T-Shirts, Mouse Pads, Clocks, Tote Bags, Coffee Mugs and Steins,
Purses, Sweatshirts, and Baseball Caps. Choose from amazingly clever "We Are the World's
Matchmakers" Smith chart design or the "Engineer's Troubleshooting Flow Chart."
My "Matchmaker's" design has been ripped off by other people and used on their products,
so please be sure to purchase only official RF Cafe gear. My markup is only a paltry
50¢ per item - Cafe Press gets the rest of your purchase price. These would make
excellent gifts for husbands, wives, kids, significant others, and for handing out
at company events or as rewards for excellent service. It's a great way to help
support RF Cafe. Thanks...
 Axiom Test Equipment allows you to
rent or
buy test equipment,
repair
test equipment, or sell or trade test equipment. They are committed to providing
superior customer service and high quality electronic test equipment. Axiom offers
customers several practical, efficient, and cost effective solutions for their projects'
TE needs and is committed to providing superior customer service and high quality
electronic test equipment. For anyone seeking a way to offload surplus or obsolete
equipment, they offer a trade-in program or they will buy the equipment from you.
Some vintage items are available fully calibrated. Please check out Axiom Test Equipment
today - and don't miss the blog articles!
These archive pages are provided in order to make it easier for you to find items
that you remember seeing on the RF Cafe homepage. Of course probably the easiest
way to find anything on the website is to use the "Search
RF Cafe" box at the top of every page.
About RF Cafe. I also
have an extensive list of
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