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5 of the August 2022 homepage archives.  Sunday the 14th
 This custom
Analog Electronics themed Crossword Puzzle for August 14th, 2022, is brought
to you by RF Cafe. All RF Cafe crossword puzzles are custom made by me,
Kirt Blattenberger, and have only 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!
 Since 2003, Bittele Electronics has consistently
provided low-volume, electronic contract manufacturing (ECM) and turnkey PCB assembly
services. It specializes in board level turnkey
PCB assembly
for design engineers needing low volume or prototype multi-layer printed circuit
boards. Free Passive Components: Bittele
Electronics is taking one further step in its commitment of offering the best service
to clients of its PCB assembly business. Bittele is now offering common passive
components to its clients FREE of Charge.
Friday the 12th
 Reed switches have been in use for a long
time, and are still common today. The position-sensing ones with mercury inside
as the connection making and breaking medium have long been gone from the market.
Mercury is on the boogeyman list of items that shall not be used in any form, regardless
of how inaccessible or how small the amount happens to be. Mercury is an excellent
choice for the job because it provides a reliable contact without arcing, and
the angle of make/break is highly repeatable (especially as compared to a bimetal
spring with hard contacts). Mercury switches were the de facto standard in
wall switches for lighting for decades. Not only do I remember my elementary school
teacher passing beads of mercury around for us kids to experience the properties
of (heavy for its size, and liquid metal at room temperature), but I also remember
breaking apart light switches to get the mercury out of them. I'd guess the danger
of such a small exposure to mercury people were exposed to back in the day pales
in comparison to all the toxic ingredients in food (processing and preservatives),
off-the-shelf common chemicals (i.e., RoundUp™, bug poisons, etc.), the plethora
of "recreational" drugs, and government-mandated virus injections a large portion
of society avails itself of today. This 1965 Electronics World magazine
article has, among other good information, an interesting table comparing data on
typical conventional relays, reed relays, and transistor...
 ConductRF offers many lines of Lab &
Production RF Test solutions for DC to 18 GHz.
TEA80 series TESTeCON and TESTeLINK RF coaxial cable product lines feature standard
connector choices include straight male, female, and bulkhead, and right angle male.
Standard interfaces include type-N, TNC, SMA, 3.5 mm, and 2.92 mm. Phase
stable testing ±4° to 18 GHz, amplitude stable to ±0.2 dB to 18 GHz,
max power 170 W @ 18 GHz, flex life over 10,000 cycles, cable loss <0.330 dB/ft
@ 18 GHz, VSWR <1.30:1 (typical < 1.20:1). VNA Series cables are enhanced
with a stainless steel spiral armor, providing protection from excess bending and
crushing forces. New TNC Options to 18 GHz Now Available from Digi-Key...
 Until maybe 30 to 40 years ago, there was
still a certain amount of awe associated with new applications of technology. It
seems anymore people are so accustomed to new and amazing things - usually at affordable
prices - that the wonder is gone. Advancements are expected. The world is moving
so fast that it is difficult to absorb and fully appreciate all the work being done.
In 1947 when this "Sound
Broadcasting from Airplanes" article appeared in Radio News magazine,
both airplanes and electronics were still relatively new to a lot of people, especially
in more rural areas, so a whiz-bang scheme like broadcasting messages from an airplane
was a big deal to many. It was an area of science that had not yet been explored
to a large degree. BTW, the spell checker flagged a new word (for me, anyway): genemotor
which, as it turns out, is the generic name for the line of dynamos, generators,
engines, and motors manufactured by Pioneer Gen-E-Motor Corporation of Chicago,
Illinois...
 "Materials that switch from one phase to
another when illuminated by light with different polarizations could form a platform
for
ultrafast photonic computing and information storage, say researchers at the
University of Oxford, UK. The materials take the form of structures known as hybridized-active-dielectric
nanowires, and the researchers say they could become part of a multiwire system
for parallelized data storage, communications and computing. Because different wavelengths
of light do not interact with each other, fiber optic cables can transmit light
at multiple wavelengths, carrying streams of data in parallel. Different polarizations
of light also do not interact with each other, so in principle each polarization
could similarly be employed as an independent information channel. This would allow
more information to be stored, dramatically increasing information density..."
 Garod Radio Corporation, a shortened version
of the original Gardner-Rodman Corporation, operated out of Brooklyn, New York in
their later days and Newark, New Jersey beginning in the early 1920s (see p180 of
Radio Retailing magazine August 1925). Many of their models had a molded "plastic"
look long before plastic was used in commercial products. The material appears to
be a painted or brightly stained phenolic type of substance. This schematic and
parts list appeared in the July 1948 edition of Radio News magazine. For
lots of information on Garod, see pages 3 through 20 of the September 1945 issue
of Radio Television Journal, found on the World Radio History website.
"The Garod extra measure is symbolic of a new and broader conception of radio design,
engineering and performance. It means custom-character radios produced by modern,
scientific manufacturing methods. It means an exciting new adventure in tonal reproduction...
 RF
Cafe's raison d'être is and always has been to provide useful, quality content for
engineers, technicians, engineering managers, students, and hobbyists. Part of that
mission is offering to post applicable job openings. HR department employees and/or managers of hiring
companies are welcome to submit opportunities for posting at no charge. 3rd party
recruiters and temp agencies are not included so as to assure a high quality of
listings. Please read through the easy procedure to benefit from RF Cafe's high
quality visitors...
 KR Electronics designs and manufactures
high quality filters for both the commercial and military markets. KR Electronics'
line of filters
includes lowpass, highpass, bandpass, bandstop and individually synthesized filters
for special applications - both commercial and military. State of the art computer
synthesis, analysis and test methods are used to meet the most challenging specifications.
All common connector types and package form factors are available. Please visit
their website today to see how they might be of assistance. Products are designed
and manufactured in the USA.
Thursday the 11th
 When Mac asked Barney if he had ever heard
of the
National Inventors Council (NIC) and he replied that he hadn't, he was not alone
- then or now. I don't recall having heard of it, either. According to Mac, the
Council "was created in 1940 by the Secretary of Commerce with the concurrence of
the President to establish a means by which the natural inventive talent of the
American people could be used to aid the war effort." The idea was to pool resources
and present good ideas to the attention of the War Department (now the Department
of Defense)." At the end of World War II and the Korean War, the NIC was absorbed
into the National Bureau of Standards (NBS), which is now called the National Institute
of Standards and Technology (NIST). "RM"† type batteries are mentioned as a possible
solution for operation in extreme cold. They were mercury button cells produced
by Mallory for hearing aids. Mac goes on to read many of the military's stated needs
off the wish list. Most - maybe all - of them have by now been fulfilled...
 In order to facilitate searches for information
on vintage radios, I have been scanning and running OCR (optical character recognition)
on many of the Radio Service Data Sheets like this one featuring the
Philco Model 200−X, 10−tube high−fidelity superheterodyne model in graphical
format. It appeared in the December 1934 issue of Radio−Craft magazine.
A fine restored example of the Philco Model 200−X appears on the Radio Museum website.
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. There is another Philco Model 200−X on the PhilcoRadio.com website...
 Looks like going green is costing too much
green to keep the doors open. "Europe's fertilizer plants, steel mills, and chemical
manufacturers were the first to succumb. Massive paper mills, soybean processors,
and electronics factories in Asia went dark. Now soaring natural gas and electricity
prices are starting to hit the U.S. industrial complex. On June 22, 600 workers
at the second-largest aluminum mill in America, accounting for 20% of U.S. supply,
learned they were losing their jobs because
the plant can't afford an electricity tab that's tripled in a matter of months.
Century Aluminum Co. says it'll idle the Hawesville, Kentucky, mill for as long
as a year, taking out the biggest of its three U.S. sites. A shutdown like this
can take a month as workers carefully swirl the molten metal into storage so it
doesn't solidify in pipes and vessels and turn the entire facility into a useless
brick. Restarting takes another six to nine months..."
 For some reason even a few really good technicians
and engineers have problems with
decibels. Ever since learning about, and truly understanding, logarithms, I
have appreciated the convenience of being able to use addition and subtraction to
perform multiplication and division, respectively. Decibels, being logarithms, have
always made perfect sense to me. Even the difference between voltage dB's and power
dB's has been easy to remember because of the power rule of logarithms, log (AB) = B
x log (A). Calculators offer little help when you don't comprehend the basics
of decibels. In 1955 when this article appeared in Popular Electronics
magazine, people used tables of logarithms rather than punching calculator keys.
Mathematicians and appointed underlings spent their lives generating tomes of logarithms.
Historians have found many errors in those tables while doing research, but no ships
ever sailed off the edge of the Earth due to a computational error based on them.
On a side note, I recall a day when I was a teenager where I was listening to a
distinguished lady who was the wife of a former assistant attorney general of the
U.S. (both he and his wife were Rhodes Scholars). My mother typed legal transcripts
for him...
 New Scheme rotates
all Banners 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 12,000 pages in the Google search index, RF Cafe returns in favorable
positions on many types of key searches, both for text and images. 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. I also re-broadcast homepage
items on LinkedIn. If you need your company news to be seen, RF Cafe is the
place to be.
 Windfreak Technologies designs, manufactures,
tests and sells high value USB powered and controlled radio frequency products
such as RF signal generators, RF synthesizers, RF power detectors, mixers, up /
downconverters. Since the conception of WFT, we have introduced products that have
been purchased by a wide range of customers, from hobbyists to education facilities
to government agencies. Worldwide customers include Europe, Australia, and Asia.
Please contact Windfreak today to learn how they might help you with your current
project.
Wednesday the 10th
 Many of the types and packaging styles of
batteries of yesterday are nothing like those of today. Back then, a lot of
battery packages had square corners, whereas nowadays they tend to be round.
The individual cells inside the "square" batteries were usually round, however,
because rather than using heat shrinkable tubing to hold the entire parallel and/or
series groupings together, they were inserted into rectangular cardboard boxes.
Being free to shift around in the box made inter-cell connections vulnerable to
vibration and shock, so failure rates were higher than experienced now in tightly
restrained cells in shrink tubing. Inter-cell connection failure was a big problem
with model airplanes when batteries contained in boxes were subject to sometimes
violent vibration coming from rough-running engines - often augmented by a poorly
balanced propeller. To make matters worse, in the very early days of model aviation,
"wet" cells of the lead-acid types were used to provide high power needed for vacuum
tube receivers. In a crash or hard landing (often indistinguishable from one another),
the battery cases would break allowing acid to get on electronics and wood...
 Here is another installment by Dave Harbaugh
of "Hobnobbing
with Harbaugh," this time with the theme "The Office Monster." When these comics
appeared in a 1962 issue of Popular Electronics magazine, it was still the era of
large computer mainframes and dumb terminal workstations. The concept of computers
in the workplace - much less in homes and back pockets (smartphones) - was a novelty
and beyond the comprehension of most people. This would be the equivalent of cellphone
humor today...
 Innovative Power Products (IPP), a designer
and manufacturer of
RF and microwave passive components for more than three decades, is pleased
to present their August "IPP
Product News." Innovative Power Products announces a full line of RF Resistors
and Terminations constructed with Aluminum Nitride (AlN) ceramic for low thermal
resistance and capacitance. RF Resistors IPP's high power RF / Microwave Resistor
line offers a compact, rugged, high power, high frequency solution to the most demanding
applications. IPP's RF Resistors are constructed using Aluminum Nitride (AlN) ceramic
for low thermal resistance and capacitance. Power levels range from 30 Watt to 650
Watts. These products are available in both bolt-down and solder-down packages with
silver contact tabs...
 "A month into Russia's invasion, Ukrainian
troops stumbled upon a nondescript shipping container at an abandoned Russian command
post outside Kyiv. They did not know it then, but the branch-covered box left by
retreating Russian soldiers was possibly the biggest intelligence coup of the young
war. Inside were the guts of one of Russia's most sophisticated
electronic warfare (EW) systems, the Krasukha-4. First fielded in 2014, the
Krasukha-4 is a centerpiece of Russia's strategic EW complement. Designed primarily
to jam airborne or satellite-based fire control radars in the X- and Ku-bands, the
Krasukha-4 Is often used alongside the Krasukha-2, which targets lower-frequency
S-band search radars. Such radars are used on stalwart U.S. reconnaissance platforms,
such as the E-8 Joint Surveillance Target Attack Radar System (JSTARS)..."
 Belmont Radio Corporation was located in
Chicago, Illinois. Founded independently sometime the 1920s, it became a subsidiary
of Raytheon Manufacturing after World War II in an effort to quickly launch
the Raytheon into nascent consumer FM radio and television markets. Belmont advertisements
were prominent in electronics trade magazines throughout 1940 to promote their war
efforts. A schematic and parts list for this
Belmont
Model 5240 vacuum tube radio appeared in the July 1948 edition of Radio
News magazine. I could not find an example of the radio anywhere. Based on
the schematic, my guess is it was a tabletop model. Please let me know if you know
where there is a photo of one...
 "Three large chunks of space debris that
crash-landed into Australian sheep farms have been confirmed as belonging to SpaceX,
the Australian Space Agency announced today. The space junk, found embedded in farmlands
in New South Wales' Snowy Mountains region on Saturday, came from a part of a
SpaceX Crew Dragon spacecraft that likely reentered the Earth's atmosphere on
July 9 - the day that locals reported hearing a loud sonic boom and seeing a blazing
light arc across the sky. The first of the debris, a 10-foot-tall spike seared black
by reentry, was found by local sheep farmer Mick Miners on his farm south of Jindabyne,
according to the Australian Broadcasting Corporation News. Then his neighbor, Jock
Wallace, discovered a separate chunk nearby..."
 Audiophiles of the 1950s undoubtedly were
impressed by the mention of a Rek-o-kut twin turntable with Pickering arms and pickups
for playing records, let alone a twin Ampex tape system used both for recording
and reproducing. That was awe-inducing stuff for the day, especially when applied
to a
planetarium show with visual and sound effects realistic enough to, "make adult
members of the audience duck under their seats." We don't scare so easily these
days. Here is the story of New York City's famous Hayden Planetarium after the marriage
of the aforementioned sound and control system with its legendary Zeiss star projector.
It appeared in the January 1955 issue of Popular Electronics magazine (which
had just begun publication four months earlier)...
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...
 Anritsu has been a global provider of innovative
communications test and measurement solutions for more than 120 years. Anritsu manufactures
a full line of innovative components and accessories for
RF and Microwave Test and Measurement
Equipment including attenuators & terminations; coaxial cables, connectors &
adapters; o-scopes; power meters & sensors; signal generators; antenna, signal,
spectrum, & vector network analyzers (VNAs); calibration kits; Bluetooth &
WLAN testers; PIM testers; amplifiers; power dividers; antennas.
Tuesday the 9th
 Little could Electronics World magazine
editor William Stocklin have known in 1965 when he wrote this "The
Battery Renaissance" article the advances in technology that would occur half
a century later. Consumer products were at the time just becoming small, energy
efficient, and inexpensive enough for widespread adoption, having only recently
evolved from high voltage and power vacuum tube circuits to transistorized versions
of radios, televisions, tape recorders, and other portable devices. Carbon-zinc
batteries still dominated the markets and came in relatively high voltage packages
to power voltage multiplier circuits for tube biases, but alkaline and mercury batteries
did the job for transistors where non-rechargeable cells were used, and nickel-cadmium
(NiCad) was the rechargeable battery of choice. Those chemistries ruled for decades,
until nickel-metal-hydride (NiMH) came on the scene in the 1990's with a higher
energy density than NiCad, and then the advent of Lithium-Polymer (LiPo) trumped
them all. Of course at the same time semiconductor devices were shrinking in size,
power consumption, voltage requirements, and cost. It is hard to imagine where the
market goes from here. I won't be here fifty years...
 Amphenol has been around since 1932, when
founder Arthur Schmitt offered sockets for vacuum tubes, just 12 years before this
ad appeared in Radio News magazine. Now headquartered in Wallingford, CT, the company
began life in Chicago, Illinois. Amphenol was a major supplier of coaxial cable
in the days when most of the cable Americans used was produced in the country. Alpha
Wire, Amphenol, Carol Cable (now part of General Cable), and General Cable are the
names that come to mind that were around in the 1970s when I entered the radio-electronics
realm. The radar system I worked on in the USAF, and all of the defense electronics
electronics systems I worked on as a technician and engineer, used those four brands.
Today, of course, there is a seemingly unlimited number of coaxial cable suppliers,
many of which produce sub-standard products that do not hold up under even typical
operational environments. Caveat emptor...
 Innovative Power Products (IPP) has over
35 years of experience designing & manufacturing RF & microwave passive
components. Their high power, broadband
couplers, combiners, resistors, baluns, terminations
and attenuators are fabricated using the latest materials and design tools available,
resulting in unrivaled product performance. Applications in military, medical, industrial
and commercial markets are serviced around the world. Products listed on website
link to detailed mechanical drawings that contain electrical specifications as well
as performance data. Please take a couple minutes to visit their website and see
how IPP can help you today.
 Whilst doing some research on vacuum tubes,
I ran across the Western Electric website, showing that they are still building
tubes today. In particular, their historic
300B
vacuum tube, available newly manufactured at Western Electric's Rossville Works
plant, for $699 apiece, or $1,499 as a matched pair (they are typically used in
a push-pull configuration). A fair amount of vintage amplifier gear used by musicians
is still in service, and many use the 300B amplifier tube. You might ask why anyone
would spend $700 on a vacuum tube when he could simply buy one on eBay. A search
of recently sold (don't judge by unsold listing prices) 300B tube shows even the
new old stock (NOS) tubes are selling for $1,500 and up. At those prices, Western
Electric is doing equipment owners a favor by providing brand new tubes using modern
materials and production techniques for about half the cost. You might also wonder
why Western Electric is manufacturing 300B vacuum tubes today. The answer is that
they are used in Western Electric 91E audio amplifiers also being produced,
it being the modern version of their famous predecessor, the WE 91A. "A never
before realized level of performance has been achieved with a completely new approach
to SE amplifier design...
 This 1939 QST magazine advertisement
for the
Collins
Radio 17D Autotune transmitters serves a couple purposes. The first and to me
the most important is that it features the magnificent Douglas DC-3 twin engine
commercial airliner. The military version, the C-47 Skytrain transport, was listed
by Dwight D. Eisenhower as being among the four most important pieces of hardware
(the others were the bazooka, the jeep, the atom bomb - he called them the "Tools
of Victory") that helped win World War II in the European theater. It dropped
the paratroopers and towed troop gliders during the D-Day invasion. Interestingly,
although Collins claims the 17D Autotune transmitters were widely installed in Douglas
and Lockheed aircraft, a pretty extensive search for a photograph of a surviving
unit turned up nothing. I did find, however...
 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...
 SF Circuits' specialty is in the complex,
advanced technology of PCB fabrication and assembly, producing high quality multi-layered
PCBs from elaborate layouts. With them, you receive unparalleled technical expertise
at competitive prices as well as the most progressive solutions available. Their
customers request PCB production that is outside the capabilities of normal circuit
board providers. Please take a moment to visit San Francisco Circuits today. "Printed
Circuit Fabrication & Assembly with No Limit on Technology or Quantity."
Monday the 8th
 Sure, there are many straight-wire inductance
graphs around, and dozens of phone apps available for use. However, here you are
looking at this one from a 1966 issue of Electronics World magazine, so
you might as well click on it to get the full-size version, then print it out for
taping up on your workshop wall. Curves are provided for 10, 14, 18, 22, 26, 30,
34, and 38 gauge wire, lengths ranging from 0 up through 140 inches (~12 feet).
Interpolate between the curves for in-between size wires. In case you're wondering
(because you haven't clicked to see the big version of the graph), the inductance
from about 25 nH for 1 inch up through about 8.4 μH at 140 inches (#38
wire). Note that in the article logε is the natural logarithm (ln) function. When
the equation given is entered into Excel and the diameter of #30 wire (0.01003 in,
or 0.2548 cm) is used, the result is 214 nH versus the stated 200 nH.
The difference is probably mostly due to using a slide rule rather than a computer...
 W1AW, the call sign of
American Radio Relay League (ARRL) founder Hiram Percy Maxim, lives on long
past his death in 1936 as the call sign of the official ARRL broadcast station
located in Newington, Connecticut. Two of the ARRL's main qualifications for status
as a 501(c)3 entity are its public services and educational aspects. Broadcasting
practice Morse code messages has always been a service (and educational tool) provided
for Amateur radio operators of all statuses from rank beginner working toward his/her
first license to the seasoned 50 wpm veteran bugmeister (code proficiency is
no longer a requirement for any license level). The people and equipment have changed
since the article appeared in a 1957 edition of Popular Electronics, but
the fundamentals have not...
 "An international team of researchers has
demonstrated that the
Square Kilometre Array Observatory (SKAO) is capable of detecting radio emissions
from normal spiral galaxies in the early universe. The SKAO, whose construction
began this year, will soon be the largest radio telescope in the world. The astronomers,
who are part of the SKAO's 'Extragalactic Continuum' working group, are looking
for a way to study a cosmic era in which star-forming activity suddenly decreased
after an epoch known as 'Cosmic Noon.' To this end, they simulated the physical
properties of the interstellar medium of galaxies similar to the Triangulum Galaxy
(M 33) and the Whirlpool Galaxy (M 51) in an early age of the Universe. The results
show that potential surveys should be sensitive enough to detect galaxies already
in SKAO's first deployment phase..."
 Exodus Advanced Communications is a multinational
RF communication equipment and engineering service company serving both commercial
and government entities and their affiliates worldwide. We are pleased to present
the new Exodus Model
AMP4065B−LC, 18.0-26.5 GHz, 200 W Solid State Amplifier - another
industry first from Exodus. Designed for High Field Level EMC Testing, Mil−Std 461(RS103)
standards as well as other High-Power Applications. Exodus Model AMP4065B−LC is
a 12U design providing outstanding power/gain flatness, Forward/Reflected power
monitoring in both dBm & Watts, VSWR, voltage/current and temperature sensing
for superb reliability and ruggedness. Unprecedented reliability compared to TWT's,
53 dB gain including gain control, and −20 dBc harmonics. 10 W, 20 W,
40 W, 60 W & 100 W versions available...
 These are the schematics and parts list
for the vintage
Arvin model 140P vacuum tube radio, as it appeared in the November 1947 issue
of Radio News magazine. I scan and post these for the benefit of hobbyists and historians
seeking such information. As time goes by, there is less and less likelihood that
records of these relics from yesteryear's archives will be made available. The thumbnail
image of an Arvin Model 140P is from a Chinese website - the only example I could
find. As with all historical information, it takes someone with a personal interest
in preserving the memories in order to fulfill the mission, and I am glad to be
a small part of that cadre. A very large list of Radio Service Data Sheets and Schematics
and Parts Lists like this one is given at the bottom of the page...
New Scheme rotates
all Banners 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 12,000 pages in the Google search index, RF Cafe returns in favorable
positions on many types of key searches, both for text and images. 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. I also re-broadcast homepage
items on LinkedIn. If you need your company news to be seen, RF Cafe is the
place to be.
 Alliance Test Equipment sells
used / refurbished
test equipment and offers short- and long-term rentals. They also offer repair,
maintenance and calibration. Prices discounted up to 80% off list price. Agilent/HP,
Tektronix, Anritsu, Fluke, R&S and other major brands. A global organization
with ability to source hard to find equipment through our network of suppliers.
Alliance Test will purchase your excess test equipment in large or small lots. Blog
posts offer advice on application and use of a wide range of test equipment. Please
visit Allied Test Equipment today to see how they can help your project.
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.
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