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"Einstein did his best stuff when he was working as a patent clerk!" - Dr. Peter Venkman

Today in History

Sound Broadcasting from Airplanes

Sound Broadcasting from Airplanes, September 1947 Radio News - RF CafeUntil maybe 20 to 30 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, 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

MECA Announces RF Parts On Demand (RFPOD)

MECA Announces RF Parts On Demand (RFPOD)MECA Electronics announces our expedited online service center, the source for RF Parts on Demand (RFPOD) when you need them. RFPOD offers an expedited online service that process your order and has it available for pick up at will call or shipment within 2 hours from order placement to pick up time! Will Call pick up hours are 9:00 AM to 5 PM (ET) - earlier hours are available by calling customer service in advance at (973) 625-0661. Let us help solve your component problem, we are here when you need us, orders are accepted 24 hours a day, 7 days a week and shipments are made same or next business day

Money in Radio Gadgets

Money in Radio Gadgets, February 1933 Radio-Craft - RF CafeSubstitute "cellphone" for "radio" in this title and editorial by Hugo Gernsback in 1933 and it would fit right in with today's market of wondrous gadgetry. Prescient as always, Mr. Gernsback describes, among other things, what we now refer to as energy harnessing to power ancillary devices and props. He also recommends a scheme for causing 'dancing dolls' on the surface of a table vibrated and mobilized by the sonic waves of a large speaker - a lot like the way years later vibrating football games were made (remember them?) where the men danced randomly

Nokomis Needs Engineers & Scientists

Nokomis Is Seeking Outstanding PhD and MS Level Electrical Engineers, Physicists and Computer Scientists - RF CafeThis is a good week for engineer job openings. Nokomis is seeking outstanding PhD and MS level electrical engineers, physicists and computer scientists position will support design and enhancement of next-generation RF/microwave devices. 3-10 years' experience is required depending on the position. Military background is a plus. Experience should include RF/microwave design and/or measurement with a focus on RF sensor systems and signal analysis. Experience with receivers, transmitters, and transceivers is a plus. Test and measurement experience as well as filter design

Acoustics Anagram

Acoustics Anagram, October 1961 Electronics World - RF CafeIsn't an anagram a word game where letters of one word are rearranged to spell another word or series of words? For instance, an anagram for 'microwave' is 'warm voice,' one for ''resistance" is "ancestries," and for "vector" is "covert." If so, then this puzzle is misnamed; it is really a crossword puzzle. Maybe back in 1961 the word anagram included this type of puzzle. Regardless of the naming error, I did learn a new word: "inertance," which means "the effect of inertia in an acoustic system, an impeding of the transmission of sound through

R&S Phase Noise Analyzer and VCO Tester

Rohde & Schwarz Presents the Ultrasensitive R&S FSWP Phase Noise Analyzer and VCO Tester - RF CafeThe new phase noise analyzer and VCO tester from Rohde & Schwarz enables ultrasensitive and ultra-fast phase noise measurements. The R&S FSWP also allows users to very easily measure pulsed sources and residual phase noise of RF components. Plus the instrument can be upgraded to a signal and spectrum analyzer. With the new R&S FSWP phase noise tester, users can measure the spectral purity of signal sources such as generators, synthesizers and VCOs more quickly than with any

NuWaves Needs RF Engineers

NuWaves Engineering Seeks an Engineering Manager - RF CafeNuWaves Engineering, a premier supplier of RF systems, RF products, and engineering design services, is actively seeking talented and highly motivated RF Design Engineers with 4 plus years of experience in RF system and/or circuit design to support engineering development. NuWaves is a fast growing RF Design Engineering firm located in Middletown Ohio – North of Cincinnati and South of Dayton. Individuals must have knowledge of RF systems and circuit design. Experience with PLLs, LNAs, PAs, demodulators, modulators and other communication circuitry is essential 

No-Nonsense General Class License Study Guide

No-Nonsense General Class License Study Guide - RF CafeDan Romanchik (KB6NU), author and instructor on all things Ham radio, has just released his latest Amateur Radio exam book titled "No-Nonsense General Class License Study Guide: (for tests give between July 2015 and June 2019). The new question pool takes effect on July 1st of this year and lasts for four years. It is available in both paperback and Kindle formats. Hopefully, Dan (read his blog) has plans to release a new version for his Amateur Extra study guide for the new question pool in 2016, for which I'll be studying. See the formal press release.

Lake Chevrolet Business Card in 1934 Radio-Craft

Lake Chevrolet Business Card Found in 1934 Radio-Craft  - RF CafeWhilst perusing the June 1934 edition of Radio-Craft magazine, I found betwixt the pages this business card from the Lake Chevrolet Company, of Devils Lake, North Dakota. As you can tell by the old panel truck on it, the year it was printed was probably sometime around 1934. While this business card does not have the value of a 1900s era blue chip stock certificate I keep hoping to find, it does have historic and nostalgic value - at least to me as an appreciator of the people and institutions that built America. The handwriting on the back of the card says, "Delivery 577. Cab box chassey[sic]," and "Let me know at least 3 weeks ahead." Although you cannot tell

NuWaves Seeking an Engineering Manager

NuWaves Engineering Seeks an Engineering Manager - RF CafeNuWaves Engineering, a premier supplier of RF systems, RF products, and engineering design services, is actively seeking talented and highly motivated Engineering Manager. Reporting to the CTO, the Engineering Manager directs the implementation of various strategic and tactical operations by performing the following duties either personally or through direct reports. Essential functions include: • Write and present proposals, reports and related findings • Participate in development and deployment of NuWaves' mission and business strategies • Perform RF Design • Responsible for leading and supervising design engineers as they

NuWaves Wins NASA SBIR Phase II Contract for C-Band PA

NuWaves Wins NASA SBIR Phase II Contract for C-Band PA Development and Prototyping - RF CafeNuWaves Engineering, an international RF and microwave solutions provider, announced today that the company has been awarded a Phase II Small Business Innovation Research (SBIR) contract from the National Aeronautics and Space Administration (NASA) to develop and prototype a miniature linear and high-efficiency C-band power amplifier to provide communication range extension for a variety of NASA missions and applications, including Unmanned Aircraft Systems (UAS) integration into the National Airspace System (NAS). Under the terms of the contract, NuWaves will,

Tech Headline News

11-Year-Old College Graduate with 3 Degrees

Extraordinary Magnetic Shield Could Reveal Neutron's Electric Dipole Moment

Vertical GaN Transistors with Buried P-Type Current Blocking

Radio Freedom Act Support Nears 200 in House

Target Announces Nationwide RFID Rollout

Mobile Device User Interfaces Will Evolve Beyond Touchscreens

NRL Patents Small, Orbital Space Junk Sensor

Spin Currents Endure at Room Temperature in Germanium

Designing Microwave Devices from Scratch Using Computer Simulations

Precision Nanobatteries by the Billions

NSA Planned to Hijack Google App Store to Hack Smartphones

Cutting E-Waste: Device Self-Destructs When Heated

SEMI April 2015 Book-to-Bill Shows Continued Improvements

- More Headlines -

A Passive RF Limiter

A Passive RF Limiter, December 1966 QST Article - RF CafeThis passive RF limiter is a simple combination of cascaded "T" type resistive attenuators that are switched in and out of the circuit based on the power level in the line. The design takes a bit of thinking due to needing to retain a reasonable impedance match at the input and output throughout various stages' conduction states. Arriving at an optimal value for resistors would require a circuit simulator with a mathematically based optimizer, but, especially for amateur radio work, close is good enough. That is not to say Hams are a bunch of slackers - they're not - it's just that component and software resources are not as readily available (aka 'prohibitively expensive') for doing the analysis and testing. In 1966 when

Copper Mountain Debuts New High-Performance VNAs

Copper Mountain Technologies Debuts New High-Performance VNAs - RF CafeCopper Mountain Technologies (CMT) introduced a new series of high-performance vector network analyzers (VNAs) designed to efficiently handle advanced test applications at the 2015 International Microwave Symposium (IMS) in Phoenix on May 17-22. The Cobalt series, which presently features the C1220 and C1209 models, offers an unmatched price-performance combination for S-parameter measurement between 100 kHz and 20 GHz. To achieve high performance and an affordable cost, the design and production of Cobalt VNAs incorporates several

Dr. Peter Venkman Quote on Einstein

Dr. Peter Venkman: Ghostbusers(tm) - RF Cafe"You're always so concerned about your reputation. Einstein did his best stuff when he was working as a patent clerk!" - Dr. Peter Venkman, Ghostbusters

 

Sivers IMA Adds East Coast Microwave as Distributor

Sivers IMA Recruits East Coast Microwave as New Distributor for the North American Market - RF CafeSivers IMA, a leading manufacturer of millimeter wave products and Boston-based East Coast Microwave (ECM), today announced that they have signed a reseller and distributor agreement for the US and Canadian markets. ECM will represent the whole Sivers IMA product range including Converters and Customized Transceivers, Radar Sensors and Signal Sources such as VCOs and synthesizers. “The agreement with ECM is an important part of our expansion strategy. The North American market naturally holds a large potential for our products and we strongly believe that ECM is the right local partner for us to meet the interest we see”, says Robert Ekström CEO of

2015 College Majors with the Highest Starting Salaries

2015 College Majors with the Highest Starting Salaries: Forbes - RF CafeForbes just published its newest list showing which college majors currently enjoy the highest starting salaries. Engineering and architecture top the list at $50k US, while computers and mathematics follow closely. Next comes health fields and then business. The physical sciences fare worse than social sciences, which I find disturbing. For comparison, workers with only a high school education average $22k US. What is not mentioned, but probably implied, is whether pay for those with only a high school diploma is for right out of school or four years later when the college graduate would begin his/her career. That might be a more fair 

Mechanical Bandpass Filters for I.F. Ranges

Mechanical Bandpass Filters for I.F. Ranges, February 1953 QST - RF CafeMagnetostriction is a term not seen very often these days. It describes the physical shape change that takes place in certain ferrous materials when subject to a magnetic field, and is responsible for most of the familiar 'hum' that comes from transformers. The effect is used in mechanical filters as transducers between the electronic circuit and the mechanically resonant disks that define filter bandpass characteristics. Elemental cobalt exhibits the highest room temperature magnetostriction (units are 'microstrains'). Nickel, with about half the value as cobalt, is cheaper and more abundant and is therefor more commonly used in modern magnetorestrictive transducers. Way back in the 1980s while

Career Advice Articles

Engineering Career and Job Hunting Advice for May 18, 2015 - RF Cafe"How to Meet Amazing People Without Sleazy Networking" - now there's a catchy article title for you. It is one of the career advice offerings I found in my search for useful (mostly) items for this go-round. Not being a 'networker,' probably ultimately to my disadvantage, I am not fluent or knowledgeable in the art. However, a lot of engineers' livelihoods are significantly dependent on well-honed

- The 50 Happiest Companies in America for 2015
- 6 of the Best Tech Meetups in the U.S.
- How to Meet Amazing People Without Sleazy Networking
- Storytelling 101: How to Inspire, Influence and Get Results (interesting approach)

everythingRF Providing IMS 2015 Coverage

everythingRF Providing IMS 2015 Coverage - RF CafeeverythingRF will be covering the IMS 2015 in Phoenix, Arizona. A link to the live coverage can be found here. This is a non-bias coverage unlike most of the other journals where they only publish what their sponsors are showcasing. This page will be updated as and when new products and announcements are made at the event. Visit www.everythingRF.com to learn more

More Vintage Radio Service Data Sheets for the Archive

Hetro Air-Ace Series M, 9-Tube 4-Band Superhet, May 1936 Radio-Craft - RF CafePlease bear with me again as I post these six radio service data sheets for the benefit of hobbyists and archivists who might be searching for such information either in a effort to restore a radio to working condition, or to collect archival information. Putting links on the homepage helps get them registered fast in search engines. Hetro Air-Ace Series M, 9-Tube 4-Band Superhet, Crosley Model 1155, 11-Tube 4-Band Superhet, Canadian Westinghouse Model 175, 7-Tube Dual-Range Superhet Radio Service Data Sheet, Arvin Model 35, 8-Tube Car-Radio Receiver, Philco Models 39 and 39A, 6-Tube Dual-Range Battery Superhet, Philco-Packard Deluxe, 7-Tube Superhet Car Radio

Author: Kirt Blattenberger on Google+ Author:
Kirt Blattenberger