IPP Intros New100–520 MHz
90° SM Coupler
Power Products introduces their Model IPP-7057,
a 200 watt surface mount 90° Coupler that operates from 100–520 MHz. Detailed product specs, including the outline
drawing, typical test data, and s-parameters are available on IPP's website. The IPP-7057 will combine two signals
up to 200 watts CW of total output power. This coupler is produced in an SMD package size of 0.750 x 2.00 inches.
Insertion loss is less than 0.60 dB, amplitude balance is less than ±0.80 dB, phase balance is less than ±7°.
TV Standards Paves Way
for Commercial Service
story from a 1941 edition of National Radio News reports on the FCC's having passed regulations to allow
the rollout of
television service as of July 1, 1941. These standards, observes the Commission, "represent, with but few exceptions,
the undivided engineering opinion of the industry." They "satisfy the requirement for advancing television to a
high level of efficiency within presently known developments." Furthermore, "Frequency modulation is required for
the sound accompanying the pictures. Thus, television is now benefited by the recent developments of frequency...
Please Thank PMI for Their
Monolithics has been setup to design, develop, manufacture, test, and market complex state-of-the-art
RF MIC and MMIC components, supercomponents, and subsystems for applications in telecommunications, terrestrial,
satellite, and mobile-radio communications, defense (ECM, ECCM, ESM, Radars, EW), CATV, navigation and marine electronics,
FAA/DOT-avionics, ground based systems, and MLS.
Please Welcome RIGOL
Technologies as an Advertiser
Technologies is an emerging T&M leader and a technology innovator in electronic measurement. RIGOL's premium
line of products including: DSOs,
Power Supplies, Signal Generators,
and Waveform Generators. The
DSA800 Spectrum Analyzer by RIGOL redefines the
product category by setting new standards for performance and price. Its digital IF technology guarantees reliability
and performance will meet the most demanding RF applications.
Forbes' 2014 Richest
just published their list of the world's richest people for 2014, which
includes 1,645 billionaires. Bill Gates bubbled to the top this year, edging out Mexico's telecoms tycoon Carlos
Slim Helú, who held the distinction the previous four years. It is amazing how often you read where once a member
of the über rich declares to be on a mission to gift huge portions of wealth to charities, he/she seems to
get even wealthier. Scanning through the list of the wealthiest people and looking at the businesses they are associated
with makes apparent that big bucks can be made in just about any realm as long as you are one of the top players.
Owning a casino is a good bet for making...
Anatech Intros Cavity BPF
Filters & 4-Way Power Divider
Electronics has released new designs for a 862.5 MHz
cavity bandpass filter, an 2422 MHz cavity
bandpass filter for Wi-Fi
a 2.0-2.9 GHz 4-way power divider/combiner, and a 902-928 MHz cavity bandpass filter for ISM band. All can
be ordered directly through their AMCrf web store.
Electronic Numbers Quiz
Balin created many quizzes for Popular Electronics magazine back in the 1960s and 1970s. This particular
Electronic Numbers Quiz presents various objects and your challenge is to match one of the provided numerical
values to each item. For example, a tuning fork is most commonly, in the Western world, associated with a certain
frequency for tuning musical instruments (electronic and mechanical). As is often the case, being familiar with
the "standards" of the era is helpful on a few of the items like the tuning capacitor and the IF transformer, but
you should be able to eliminate some options by knowing the impedance of the twin lead...
Searching for the Q
Cahak, RF engineer and owner of Sunshine Design Engineering Services, just sent me another paper he has authored
on the subject of determining the quality
factor ("Q") of rectangular and cylindrical cavities. Before you decide to skip
reading this article because the topic might seem too esoteric, Joe does much more than present formulas and tables.
He also includes a tale of the research needed to cull and vet the many, often conflicting, opinions of which formulas
are correct. Ultimately, a decision was made to select formulas that most closely matched empirically determined
values from published data. If Mr. John T. Frye was still writing Carl & Jerry adventures...
Cobham Awarded Option for
AN/ALQ-99 Tactical Jamming
has been awarded a $21.8 million contract modification by the US Naval Air Systems Command, exercising an option
to procure additional Low Band Transmitters (LBT), a variety of antennas and adapter interface modules for
AN/ALQ-99 Tactical Jamming System to be used by the US Navy and the Australian military. Under this option,
Cobham Defense Electronics in Lansdale, PA will manufacture 8 LBTs for the US Navy and 11 for Australia; 11
vertically polarized antennas for the Navy and 6 for Australia; 17 high band horizontally polarized antennas for
Oscillators - How They Work
Radio Institute (NRI)
was founded in 1914 at the dawn of the radio age. It provided self-study courses as well as classroom instruction
on the art of electronics and radio communications. A bi-monthly magazine titled National Radio News was
published from 1929-1953. This article explaining how oscillators work appeared in the December 1940 edition. Although
circuits of the day used vacuum tubes, the principle of voltage and phase relationships required to initiate and
oscillations are the same as for transistor circuits. A step-by-step description is provided from the time the
power is applied until stable oscillations are established.
for RF Engineers
not a big fan of government employees in general since many, IMO, are filling unnecessary jobs created to build
voter bases and expand the power and influence of politicians and appointed bureaucrats. It places a huge burden
on those of us who do real work by having to deal with their ineptitude and arrogance and having our hard-earned
income taken to subsidize their pampered existence. That said, there are
government jobs and employees that
I highly regard, being primarily those who work in high technology fields. Who can argue that, with the exception
of many high ranking department appointments of political nature, the rest of the people are typically very skilled...
Please Visit Comdel in
Appreciation of Support
are many reasons why Comdel RF power supplies, DC generators
and matching networks are used by the leading semiconductor equipment manufacturers, solar cell / photovoltaics
manufacturers and IC makers
the world. Our customers value the breadth of our RF generator product line, as well as our experience, entrepreneurial
spirit and commitment. Our combination of products and people provides customers with advanced power supply technology,
proven techniques and product reliability.
"Shoe" Comic Strip
Today's edition of the Shoe comic strip had
an amateur radio gag line. Enjoy.
Lack of Expert Leads to
Reversal of Patent Case
article by Bob Ambrogi, of IMS Expert Services, reports on how the ambiguous, objective nature of the legal definition
of a "Person of
Ordinary Skill in the Art" re patent interpretation was the basis for megacorp SAP losing an infringement lawsuit
on appeal. It illustrates the
of having competent, non-egotistical legal representation for what might otherwise be considered an open-and-shut
case. In this instance, the "little guy" prevailed due to having the best legal team. Note:
IMS ExpertServices periodically sends
me e-mails that highlight recent key court cases that can significantly affect the effectiveness of expert testimony,
Thanks Much for Support
from Triad RF Systems!
RF Systems was formed in 2010 with the objective to solve the problem of HPAs being the Achilles heel in most
RF radios. We have solutions for integrating high performance
into sophisticated RF subsystems and systems without sacrificing efficiency and linearity. Call us to find out how
we do it. Triad RF Systems serves all areas of the RF and Microwave industries including military, satellite and
commercial communications. Our products operate from 10 MHz to 20 GHz.
"F-M" Put on Commercial Basis
after Edwin H. Armstrong demonstrated the viability of
FM for long distance
broadcasting in January of 1940, the U.S. FCC allocated spectrum to it in the 42-50 MHz band. Armstrong
had introduced the FCC to FM originally in 1936. The new modulation scheme was popular due to its immunity to amplitude
related noise like that generated by motors, automobile ignition systems, and lightning. However, World War II
broke out a little over a year later and most commercial radio advancements were put on hold. This article from
a 1940 edition of National Radio News could not have predicted that, or the FCC's decision to relocate
the FM spectrum to 88-108 MHz in 1945 in the closing days of WWII. Some speculate that...
Fairview Intros Low-PIM
Mini-DIN 4.1/9.5 Adapters
Microwave Inc. has introduced
4.1/9.5 adapters for applications requiring low PIM performance such as cell sites or indoor/outdoor distributed
antenna systems (DAS). Other applications of these adapters include land-mobile
radio (LMR) communications, telecom installations, wireless infrastructure, portable
sweep testing, OEM in-rack RF routing, and in-building systems. Mini-DIN adapters are similar to 7/16 DIN connectors,
but are smaller with more precise electrical performance and offer VSWR of 1.25:1 to 6 GHz.
Engineering, by David M. Pozar. Pozar's new edition of Microwave Engineering includes more material on
active circuits, noise, nonlinear effects, and wireless systems. Chapters on noise and nonlinear distortion, and
active devices have been added along with the coverage of noise and more material on intermodulation distortion
and related nonlinear effects. On active devices, there's more updated material on bipolar junction and field effect
transistors. New and updated material on wireless communications systems, including link budget, link margin, digital
modulation methods, and bit error rates is also part of the new edition.
Please Thank BRL Test
Analyzer Repair for Support
absolutely know analyzer repair. Wouldn't you like a friend
like that on your side? Repair of your existing
is the most cost effective - period. Don't be pressured by the manufacturer into buying a very expensive newer model
just because they can't or won't do the repairs on yours. Our in-house repair engineering group offers low pricing,
experience (15 years on average), military PMEL graduates, parts for repair in stock,
The Three Fives Kit:
A Discrete 555 Timer
I first laid my hands on a 555 timer IC back in the early 1980s,
it was Nirvana. Having recently separated from the USAF, working as an electronics technician at Westinghouse Electric,
and working on my electrical engineering degree in night school, I was eager to learn about and adopt every bit
of technology within reach. No opportunity was missed to integrate the 555 into my designs for test fixtures and
experimental circuits. One such application was a custom timer that controlled a UV light source for curing a particular
adhesive we were using in a DoD classified project. Those were exciting times. Signetics had introduced its
NE555 in a decade earlier to provide...
Many Thanks to LadyBug
for Continued Support
in 2005, LadyBug Technologies manufactures the PowerSensor™ line of miniaturized
USB RF & microwave power sensors. LadyBug manufactures
average, pulse, and pulse profiling sensors with GUI interfaces covering up to 26.5 GHz and 80 dB dynamic
range. These Sensors set a, patented industry standard, No Zero / No Cal technology. There is no need
to disconnect or wait for internal zeroing and calibration prior to making accurate low power measurements.
Map of Your Local Time
vs. True Sun Time
the switch to Daylight Saving Time just occurred this weekend, it makes
a good segue into the topic of time zones and shifts in general. The map shown here was created by Stefano Maggiolo,
who has a Ph.D. in geometry from SISSA, Italy, on his "The poor man's math blog" web page, and is a Google engineer.
His map depicts by what amount, based on your position in a local time zone, your clock time differs from the local
sun time. Local sun time is relative to when the sun is due south, at its highest altitude, when noon occurs. Time
zones in most of the world are fairly evenly distributed in 1/24th increments and do make fairly circuitous deviations
around states, provinces and countries, with a very obvious exception in regions of China. Some of China's time
Acquires ISO Certification
Microwave, a subsidiary of Electro Technik Industries (ETI), is now certified to ISO:
2008 by SAI Global. Nova Microwave designs and manufactures
and circulators for RF and microwave commercial and defense applications. Nova Microwave offers a number of
different styles from drop-ins to surface mounts. The frequency ranges from 380 MHz to 23.6 GHz with average power
ratings from 2 to 250 watts.
is also the great driving force which we know under the name of religion. From religion comes a man's purpose ;
from science, his power to achieve it. Sometimes people ask if religion and science are not opposed to one another.
They are: in the sense that the thumb and fingers of my hand are opposed to one another. It is an opposition by
means of which anything can be grasped. It is right, therefore, with all our heart to learn what will help us in
the work we want to do, so that when the call comes we can say, 'I am here...
Radio Control News
Printed Circuits & Capacitors
was just a decade after World War II, during which time the Army Signal Corps introduced a method of printing
- or etching - metallic circuit conductors on an insulator substrate, and thus was born the
circuit board (PCB). The first boards used a phenolic-paper laminate, which is
the shiny brown substrate material that is still found in some industrial applications like motors and control panels.
Ferric chloride was used to etch away the copper foil not masked off with photoresist chemicals. I made many crude
PCBs using a resist ink pen to draw circuit traces and component mounting pads, then etched away the exposed copper
with ferric chloride...
Win This 3-Volume Set
Handbook of Reflector
Antennas and Feed Systems
has been many years since I presented a questionnaire to website visitors in order to get a measure of what people
like or dislike and what new feature(s) might be useful. In order to qualify as an
entry, you must fill out the 15-question form in its entirety. A winner will be randomly selected. As an
incentive for you to take a few minutes of your busy day to complete and submit the form, I am offering as compensation
a chance to win the 3-volume set titled
Handbook of Reflector Antennas and Feed Systems:
"Theory and Design of Reflectors," "Feed Systems," and "Applications of Reflectors," published by Artech House.
This represents a $627 retail value.
Physics & Engineering
Crossword for March 9, 2014
Sunday I create an engineering- and science-themed
crossword puzzle using a word list that I personally created and added to during over a decade of making puzzles.
All of the words are related to engineering, science, mathematics, chemistry, astronomy, etc. There are no numbnut
clues about movie stars or clothing designers. Enjoy.
Thanks to Dow-Key Microwave
for Their Support
Microwave is the world's largest manufacturer of electromechanical
switches for RF and microwave applications. Founded in 1945,
we are also the oldest
operating RF / microwave switch manufacturer in the U.S. Dow-Key specializes in customized, high-performance coaxial,
waveguide, and high-rel switches, as well as switching systems such as RF matrices and system-level rack integration,
programmable attenuators, and delay lines.
A Few Free Technical Books
(you pay shipping)
few of the technical books generously donated by major publishers
like Artech House and Cambridge University Press are not likely to be selected by the RF Cafe monthly
Book Drawing winners, and have been sitting on my
shelf for a year or so. I would never consider selling them, but they do deserve good homes because the information
is very interesting. If you are willing to pay for me to ship them to you, I will be glad to do so. If you would
like any of the books below, please send me an e-mail with your zip code...
API Intros Broadband
8-12 GHz Limiting Amplifier
Technologies announces a new broadband
8-12 GHz limiting
amplifier ideally suited for demanding military
and high-end commercial applications such as microwave receivers, microwave telemetry systems, uplink communications
platforms, instrumentation, and military communications systems. It features excellent output flatness of 1 dB
that is independent of the input, and allows for inputs levels from -20 to -10 dBm.
Music Power Rating
- Help or Hindrance?
of us, long before being introduced to the concept of power in electrical circuits, learn about it in terms of mechanical
power and/or sound power. It takes some doing to abandon the esoteric nature of power and be trained to grasp
the scientific and mathematical aspects of power in all its forms. When the driving source is steady state or a
pure sinewave, life is relatively simple, but such is more often than not an exception to the system being studied.
Here is a nice, short treatise on the concept of sound power that will augment your earlier-learned knowledge of
AWR Announces Winners for
Taiwan U. Student Competition
Corporation announces the winners of its
2013 National Taiwan University Student Design Competition. AWR partnered with National Taiwan University in
mid-2013 to sponsor the first ever Taiwan Student Design Competition. The objective of the competition was to encourage
in Taiwan to become involved in the dynamic profession of microwave and RF engineering and to apply their knowledge
to practical designs using the highly efficient AWR design methodology...
Thanks to PCB Material World
for Longtime Support
Material World is an independent distributor and market maker of
PCB raw materials, located in the Northwest suburbs
We buy, list and sell PCB raw materials such as copper clad laminates, copper foil, drill backer and entry, among
other items. Our objective is to act as a buy-sell PCB materials exchange; enabling efficiency in materials
usage for PCB manufacturing. Our emphasis is on high end and/or hard-to-find products such as microwave materials,
colors, heavy coppers, and obsolete and other non standard products.
your workplace is anything like the ones I have experienced, most print issues of magazines end up in the mail room
recycle bin or trash can - they never make it out the door. You might even scan the TOC and dog-ear a couple pages
for later reading, but seldom get around to it before ultimately chucking them in the can. Fortunately, you can
read the articles online if you know they exist. I post a list like this one about once a week to help you keep
Microstrip Antenna Maintains
Hall Effect Sensors Measure
Fields and Detect Position
Measurements in Spectrum
Sigma Delta ADCs : A Non-
White Paper: Close Proximity
Co-Located GPS Receivers
Technologies has published a white paper titled "Low
Noise Amplifier (LNA) Linearity Impacts to Close Proximity Co-Located GPS L1 Receivers."
A commercial low-cost GPS L1 (Fc = 1575.42 MHz) receiver in close physical proximity
to a 2G/3G/4G compliant cellular handset transceiver FEM is analyzed for performance impacts related to various
forms of electromagnetic interference. A description of how the GPS L1 receiver works is presented. GPS L1 receiver
link budgets, simulation and measured receiver data, and spurious...
8 New Titles Added to
Book Drawing Selection
to the generosity of Artech House and Cambridge University Press, eight new books have been added to the selection
available to monthly RF Cafe Book Drawing winners.
There are currently 21 titles to choose from if you are the lucky person. To date, I have given away more than 90
books, and have paid the shipping cost on all of them. It is one way to thank the many visitors and contributors
to RF Cafe's ongoing success.
Carl & Jerry: TV Antennas
this episode of Carl & Jerry, the teens ponder a question posed by Jerry's mother upon looking down their hillside
home: "[L]ook at all those
antennas down there. Hardly two of them are alike; yet they're all intended to receive the same stations. How
come there are so many different kinds?" That was all the pair needed to set them off in an investigation to determine
the answer. Being avid electronics and RF hobbyists and experimenters, they discuss the principles of how antennas
work, various types of transmission lines, impedance matching, antenna types, bandwidth, and other topics relevant
to the challenge. As with most Carl & Jerry stories, the intent is to educate...
in 2005, LadyBug Technologies manufactures the PowerSensor™ line of miniaturized
USB RF & microwave power sensors. LadyBug manufactures
high accuracy average, pulse, and pulse profiling sensors
GUI interfaces covering up to 26.5 GHz and 80 dB dynamic range. These sensors set a, patented industry
standard, No Zero / No Cal technology. There is no need to disconnect or wait for internal zeroing and
calibration prior to making accurate low power measurements.
F., of Suwanee, GA, is the February 2014, RF Cafe book drawing
winner. Dean selected
Integration of Passive RF Front-End Components in SoCs, by Hooman Darabi and Ahmad Mirzaei. Each
month I select one or two names from a list of people who have either ordered one of my
RF Cafe software products, or sent me an e-mail
asking t obe entered. The book was Graciously provided by
Cambridge University Press
story appeared on a news website I found while gathering daily tech headlines... in case you've forgotten where
your e-waste is likely to end up. According to German photographer Kevin McElvaney, the 40,000 Agbogbloshie
(near Accra) locals call their land Sodom &
Gomorrah, after the Biblical city that was destroyed by fire. This is just one small part of the world where
such activities are daily routine for those living in abject poverty. BTW, similar
sacrifices are made to build our e-devices in the first
place during the extraction of raw materials and during manufacturing and transportation of finished goods. Many
of our clothes, vehicles, appliances, tools, sports items, food containers, and other items pass through...
is your chance to own a pile of vintage electronics magazines
for just the cost of shipping. As you are probably aware, for the past few years I have been buying vintage editions
of QST, Popular Electronics, Electronics World, Radio & TV News, Radio-Electronics,
and Wireless World, for the purpose of scanning and posting articles that I believe will be of interest
to RF Cafe visitors. I have gotten all I need from them and rather than having them sit around taking up space,
I am offering to mail them to you on a first come, first served basis. Most of the magazines were purchased on eBay...
1961, MECA* has served the microwave industry specific to passive components in the DC to 20 GHz frequency
range. MECA serves all areas of the RF/Microwave industries including world class network
and supporting supply chain infrastructure. We 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 & air traffic communications. *Microwave
Electronic Components of America
is scary. Believe it or not, there is a group of scientists who think it might be a good idea to beam very low frequency
(VLF) radiation into the upper atmosphere to erase the
Van Allen radiation belts. I kid you not. An article in the
March 2014 edition of IEEE's Spectrum magazine describes a plan to clear out the proton cloud residing
in the inner belt (1,000 - 9,600 km altitude) and the electron cloud hovering in the
outer belt (13,500 - 58,000 km altitude). Both Van Allen radiation belts, particularly
the outer ring, are hazardous to electronics, i.e., satellites, because of the circuit-frying potential due to a
build-up of electric charges that can, under certain conditions, penetrate an imperfect Faraday shield...
quiz from Popular Electronics challenges (not too much, though) your knowledge of
conversion in common devices. A few of them might be unfamiliar to people born after about 1990, but even so,
you've probably seem them all at some point, especially if you are a regular RF Cafe visitor
(meaning you're probably smart). Robert P. Balin constructed many of this type
quiz for PE. In fact, clicking on the following hyperlink will find the
Popular Electronics Quizzes for you.
Amazing Collection of QSL
Cards & Photos, c1924-1978
will want to see this. Collecting thousands of QSL cards and photographs of their Ham radio operators and radio
equipment is a monumental accomplishment today, but it was even more of a challenge in the early and middle part
of the last century. You must actually make contact with the station to legitimately collect a QSL card, and then
the remote operator must be willing to absorb the cost of mailing you a card. Mail service, particularly from some
overseas locations, was no guarantee of successful delivery. A large portion of radio installations were cobbled
together by their operators from scrap parts and had marginal functionality, even into the 1960s and '70s, so contacts
were more difficult. As early as 1924, Don Retzlaff's grandfather,
Thomas "Tom" Russell Gentry
(W5RG) began the process where over a span of more than half a century he acquired
more than 5,000 QSL cards from all over the Earth...
R&S Adds Liquid-Cooled
Broadband HPAs to EMC Line
Schwarz now offers up to 10 kW of power in a frequency range from 9 kHz to 225 MHz with its
R&S BBL200 amplifier family.
to a new liquid cooling system, these models are quieter and more compact than ever before. The R&S BBL200
will be on display at EMV 2014 in Düsseldorf at booth CCD-202.
Electronics designs and manufactures the industry's widest range of
RF and microwave filters at
up to 40 GHz, as well as power dividers, directional couplers, and many other product types. We specialize
in standard and custom designs for commercial wireless, public safety, satcom, and defense applications, and we
can meet stringent military environmental specifications.
R U Sitting Comfortably?
Old Time Radio on Demand
to Download and Listen to All the Old Time Radio Shows You Want"
That is the tag line on the RUSC (R U Sitting Comfortably?) website. Having been a
longtime fan of the old radio shows, I gratefully accepted an offer by co-owner Joy Norris to poke around the website
that she and her husband Ned have created. RUSC is a subscription-based collection of hundreds, nay thousands of
programs from "The Golden Age of Radio" that are available for your listening pleasure either streaming live or
as a download for listening to at a later time. A list of the main show categories appears on every page for easy
access. Not only are more familiar comedy titles like Abbot & Costello, Milton Berle, and
Father Knows Best included, but lesser known...
been a while since posting job hunting and career article links. These might be of interest to you.
8 Lies Interviewers Tell Job
5 Steps to Enhance Your
Online Job Search
Low-Cost Strategy for a
Engineering Grads Enjoy
Greater Job Prospects
How to Survive Getting Fired
from a Tech Company
8 Reasons You Should Turn
Down That Job Offer
How to Know When You've
Outgrown Your Job
Are Employees Working
More Jobs for No Pay?
Giant Resumes Fail to
Windfreak Tech designs, manufactures, tests and sells high value radio frequency products such as
RF signal generators, synthesizers, power detectors,
mixers, upconverters and
We develop high quality, reliable, low cost products to make your life easier. Windfreak Tech is developing high
quality, low cost products to make life easier for RF engineers and hobbyist. Future products will be more synthesizers,
transmitters, receivers and test equipment - All at low cost.
couple decades ago, you would expect to pay $100 for a good quality handheld DMM that measured AC and DC current
and voltage and maybe even power, plus had a few other functions like frequency counting, and capacitance and transistor
beta measurement. Now for about the same money, you can buy a handheld digital oscilloscope (DSO) for about the
same money. This 1 MHz bandwidth
RioRand DSO features 1 Msps, 12-bit sampling and a 320x240 pixel color LCD display. A 1x/10x
is included. The price from Amazon is less than $90 with free shipping. If you need more bandwidth, the
Owon HDS1021M provides a 20 MHz BW and also has a multimeter function for a tad over $200.
the extra BW and 2 channels? Less than $400 gets you the
Owon HDS1022M-N with 20 MHz BW, or $800 for the
Owon HDS3102M-N with 2 channels and 100 MHz. This is a good time to add one to your home toolbox.
Model No. DTA-14G40G-32-CD-2 is a
10 Bit programmable
attenuator with step resolution as low as 0.04 dB which provides over 32 dB of attenuation over the
frequency range of 14.0 to 40.0 GHz. This model is offered in a slim line housing measuring 2.0" x 1.8"
x 0.5" with 2.92 mm female connectors and operates on a single +15 VDC supply with only 40 mA of
current consumption typically.
I first saw this video, I thought it was a satire. The video is a for-real commercial promoting the new
Supersmoker Bluetooth e-cigarette that has built-in
Bluetooth connectivity and a music player. From their website, "Supersmoker or Clubsmoker are electronic cigarettes,
you can smoke without all the harmful ingredients of a conventional cigarette. We have two kinds, rechargeable and
disposable e-cigarettes. With the rechargeable you need refills and this cigarette can be recharged every day. The
disposable is an e-cigarette that lasts about 2 packs of conventional...
Electronics Manufacturing Corp's new MHF/U.FL series data sheet details the
company's latest ultra miniature coaxial interconnect system that operates from: DC-6 GHz. This connector interface
was developed for applications in small form factor wireless mobile electronic devices. In addition to information
on applications, materials, finishes and typical electrical performances, full detail is provided on how to specify
a MHF/U.FL cable assembly or "pigtail" assembly, including compatible coaxial cables...
over 20 years Z-Communications has employed the latest in proven technology to achieve low phase noise, wide tuning
ranges and higher operating frequencies in our VCO and PLL modules.
speed SMT manufacturing facility is located in San Diego, CA. Our solutions can be tailored to address any VCO or
PLL need with the highest performance available in today's demanding market. Z-Comm can also provide custom solutions
for customers with short deadlines.
here we have pi squared, which an engineer would call 10." -
Frank King, cartoonist, creator of Gasoline
Alley (Source: Wikipedia). That statement was made by Walt Wallet
(the main character) to his tech-inclined nephew Skeezix (cowboy
slang for a motherless calf). Over the years, Gasoline Alley included many episodes with Skeezix dabbling
in electronics - usually not very successfully.
Physics Crossword Puzzle
for March 2, 2014
week's crossword puzzle has a heavier concentration of physics-based words and clues, so I titled it the Physics
Crossword Puzzle. Highly imaginative, non? As always, all of the words are technology terms, so you won't need a
nimrod couch potato accomplice to complete it.
1994, leading wireless electronics companies have relied on 3Gmetalworx to deliver cutting edge solutions for advanced
RF/EMI PCB-level shielding requirements.
and design services to JIT manufacturing supply, our clients depend on us to provide a seamless service pathway
supporting the entire product lifecycle. In order to become the industry leader in our market segment, we have invested
in the necessary infrastructure and process optimization required to excel in this demanding field. Continual improvement
is in our DNA.
Station Design for DX - Part II
I of this article appeared in last month's (September) edition. It introduced concepts
in antenna types and siting. This second
part talks about cost tradeoffs for various aspects of a DX setup. Author Paul Rockwell does a nice job of providing
graphs of cost versus performance increases for transmitter power, antenna gain, tower height and constructions,
etc. He uses prices typical of the mid 1960s, but even without knowing the equivalent modern day equipment prices,
the shapes of the curves are good indicators of where the point of diminishing returns exists. Paul Rockwell wrote
a 4-part series on station design for long distance (DX) communications that covered
Please Thank Test Connection
Connection for Support
Equipment Connection provides test and measurement
equipment for sale, lease or rent. New and refurbished with warranty. We buy pre-owned test equipment
($2,000,000 budgeted each month) and offer asset
services to market your used surplus equipment world wide. Trade in programs are available. We offer over 300 test
equipment manufacturers including Agilent, Tektronix, Anritsu, Rohde & Schwarz, Advantest and Fluke. We buy
and sell bench top, general-purpose test and measurement equipment. Contact us today.
Station Design for DX - Part I
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 first part goes into some of the gory detail of surrounding terrain
considerations and necessary antenna launch angles, complete with equations. Most of the work is based on multi-element
horizontal Yagi antennas. The term "forezone," of which a formal definition is not locatable in a Google search
(no reference to it at all), is used throughout the series, and refers to the radiation
area in the forward direction.