Over 10000 Pages Indexed
5CCG (5th MOB):
Hobby & Fun
Airplanes and Rockets:
First Direct-Diode Laser Bright Enough to Cut and Weld Metal (waiting for diode laser soldering irons)
GM Scraps European Version of Chevy Volt (high electricity prices in EU make EVs bad deal)
China's Terrifying Debt Ratios Poised to Breeze Past U.S. Levels (entire world subsisting off unserviceable debt)
The International Microwave Symposium (IMS) is arguably the largest single annual event for radio and microwave engineers. According to IMS2014 event officials the show in Tampa, Florida, boasted of a 7,500-visitor attendance. European Microwave Week (EuMW) runs a close second place at around 7,000. In 1958, 55,000 engineers attended the Institute of Radio Engineers (IRE - eventually became the IEEE) in New York City. IMS and EuMW would love to have numbers like anywhere near that. Maybe the large number of attendees was because dissemination of information was not nearly as instant (or eventual for that matter), and the absence of the Internet or...
Because I was born in 1951, I grew up without the benefit of 1,000 cable channels available whenever I wanted them. This was during the 1950s and 1960s when we lived in the city of Pittsburgh, PA. Instead we had to make due with four - that is four - VHF television stations that we could receive on a black and white TV (actually it wasn't strictly BLACK and WHITE; there were various shades of gray). There was one TV station for each network: CBS, ABC, and NBC, plus one 'Educational' (PBS) station. Later on, we got two independent UHF stations. This was also the era when the 'blackout rule' was largely in effect for sports broadcasts, and if you didn't go to the stadium for a home game...
BeRex, Inc. has begun shipping a new family of GaAs MESFET chips, the BCF-series, which addresses the need for low phase noise with high gain and power in applications such as single and multi-stage amplifiers, oscillators, synthesizers, etc. ranging in frequency from DC to 26.5 GHz. The BeRex BCF-series of MESFET chips are ideally suited both broad band and narrow band applications from DC to 26.5 GHz. Typical application requires a high level of OIP3 linearity...
Yes, it's another nomograph. This one is for calculating the number of decibels required to amplify or attenuate a voltage level. The chart came from a 1945 edition of Hugo Gernsback's Radio Craft magazine, but decibels are still defined today the way they were nearly 70 years ago. A hard copy of a nomograph residing in a notebook or on the wall is still a handy tool when you need to do a quick calculation. Unless you have a voice-commanded app where Siri will instantly respond with a conversion for you, printing out one of these nomographs might be a really handy aid...
Anatech Electronics, a manufacturer of RF and microwave filters, has published its July 2014 newsletter. As always, it includes both company news and some tidbits about relevant industry events, regulations, and standards. This month, Sam Benzacar offers his views on the subjects of power line EMF exposure, microwave device market growth, LTE TV, GM's LTE in-automobile hot-spot, and switching consciousness on and off. He also has a short article titled, "Curing Interference: Never Too Late."
RF Cafe visitor Mark J. Blair (NF6X) wrote to let me know about the Chalco Paper Tape Reader that he procured and restored. The Chalco unit was used in the TPN-19 ground-based mobile airport surveillance and precision approach radar. Mark would appreciate being contacted by someone who actually worked with the reader on the TPN-19. Mark has a very interesting website that you might enjoy. Says he, "I like to collect, restore and play with military surplus equipment, and that's mostly what this web site is all about."
This is a great example of how Popular Electronics and John T. Frye used the "Carl & Jerry" series to teach some basic electronics design principles through story telling. In this adventure, the guys decide to build a tachometer from schematics they found in a magazine. They debate amongst themselves how the circuits works, the best way to assemble the circuit, component selection, vibration- tolerant mounting, and how to properly calibrate the tach to accurately display engine revolutions per minute.
Even though you would never know by today's Hewlett Packard (HP), the company's roots are in electronics test equipment (never thought I might have to explain that!). Most people who have been in the electronics realm are familiar with the story of Dave Packard and Bill Hewlett starting their business in the 12'x18' single-car garage where Dave and his wife lived at 367 Addison Avenue in Palo Alto, California. Bill, yet a bachelor, moved into the garage in 1938 (an early entrepreneurial engineer trend setter who literally lived in his office). Their first commercial product was the Model 200A Audio Oscillator. Hewlett Packard went on to become the world's foremost maker of electronic test equipment for communications, medical, basic research...
PMI's organization has been setup to design, develop, manufacture, test, and market complex state-of-the-art hybrid RF MIC and MMIC components, supercomponents, and subsystems. Unique products for applications in space, military, commercial, telecommunications, and consumer electronics systems. DC to 40 GHz.
It's time for another round of job hunting and career advice stories. There is no limit to the amount of advice offered by helpful 'experts.' Many of these particular bits of guidance for your life come from authors on LinkedIn, Monster, Money, etc., which typically do have good content. Considering, however, the quality of helpful suggestions offered by your friends and acquaintances in the real world, it would be wise to learn a little about the source before potentially risking your future.
National Union Radio Corporation was ahead of its time in terms of hiring women engineers. Admittedly, they and all other manufacturers were dealing with a shortage of male engineers due to the ongoing need by the military for fending off the scourges of fascism, Nazism, communism, socialism, and all the other 'isms' of the day that threatened to overtake the world. However, they should receive due credit for going out of the way to promote the sciences as careers for the fairer gender. The advertised positions required the successful applicant to have earned a bona fide degree in physics, electrical engineering, chemical engineering...
Someone had to take the initiative to launch an improved high-tech immigrant worker program. Accordingly, I took the liberty of creating a K-1B Visa for high technology workers. Congress has not officially written it into law, but American politicians and executives make no pretense of enforcing law they disagree with anymore, so it really does not matter. Here is how the K-1B Visa program works: It is widely known that the United States now considers itself to be a country without a southern border. All anyone needs to do to become an accepted American citizen (the new definition, not the old) and enjoy all the freedoms guaranteed by our Constitution (well, except the parts...
"Houston… tranquility base here. The Eagle has landed." Where were you 45 years ago when you heard on radio watched on a B&W TV like I did as Apollo 11's 'Eagle' lunar module touched down on the moon - with less than 30 seconds of fuel remaining? A short while later Neil Armstrong and Buzz Aldrin became humans #1 and #2, respectively, to step onto the lunar surface. "We came in peace for all mankind," was plaque attached to the part of the lunar lander that stayed behind. Poor Michael Collins had to be content with orbiting the moon while is shipmates went to the surface. I created this special crossword puzzle this morning to commemorate the Apollo 11 mission...
Custom Interconnects announced the release of the most detailed RF characterization conducted to-date on their flagship Fuzz Button® technology platform. The reports are geared towards 50 Ohm impedance matching at high frequencies and include bandwidth measurements, S-parameters and VSWR, as well as SPICE Models. The reports were released as a follow-up to the recent IEEE IMS held in Tampa and are expected to draw a great deal of interest from the RF design community who were eagerly awaiting their arrival...
Atmospheric scientists suspected as recently as early 1957 that Earth's upper atmosphere (ionosphere and beyond) temperature might be around 1,000° K. I say 'suspected' because we had not yet launched instruments there to make actual measurements. Soundly posited and agreed upon theory was validated a short time later when sounding rockets reliably reported a maximum of about 1,300° K in the upper ionosphere. We did not know for sure what electromagnetic wavelengths and their respective energy densities would be outside the protective layers of gases encompassing Earth. Much more was known about the depths of the planet's oceans than of its atmosphere. Scientists knew that life was abundant...
Advanced Test Equipment Rentals provides the latest models of test and measurement equipment from top name manufacturers like Agilent, Fluke, Anritsu, R&S, Tektronix, and Yokogawa. Our primary focus is providing a complete rental solution of test and measurement equipment to industries such as aerospace, defense, EMC, and communications.
Finance for Engineers: Evaluation and Funding of Capital Projects, by Frank Crundwell. I saw this book over on the EE Times website and figured it would be a good subject for my Featured Book spot. With flair and an originality of approach, Crundwell brings his considerable experience to bear on this crucial topic. Uniquely, this book discusses the technical and financial aspects of decision-making in engineering and demonstrates these through case studies. It's a hugely important matter as, of course, engineering solutions and financial decisions...
TODAY, July 22 from 4-5 pm EDT.
There is still time and space available to register for this afternoon's webinar presented by Fernando C Gonzalez. This interactive journey, from the humble electron all the way up to the self-driving car, explores sound and light, size, wavelength and frequency. Overview of the history and evolution of radar. From the origins of radar prior to WWII, through pulse Doppler, CW, monopulse radars, and to modern active electronically scanned arrays (AESA), the attendee will understand the fundamentals of how radars work. A 10-15 minute Q&A follows.
"It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow." - Dr. Robert Hutchings Goddard
NI (formerly AWR Corporation) has released V11.01 of the NI AWR Design Environment™ with enhancements to Analyst™ 3D FEM EM simulation engine that cuts simulation times by as much as 70% over previous versions. The updates in V11.01, which are specific to Analyst, include algorithm reformulations/enhancements to both automatic mesh refinement (AMR) and fast frequency sweeps. For high-port-count designs (10+ ports), the speed improvements seen with Analyst are the most pronounced...
Author: Kirt Blattenberger