•−•  ••−•    −•−•  •−  ••−•  •
RF Cafe Morse Code >Hear It<

Job Board

About RF Cafe™

Sitemap

RF Cafe Software

RF Cascade Worbook
 RF Cascade Workbook 2005 - RF Cafe
Calculator Workbook
RF Workbench
Smith Chart™ for Visio
Smith Chart™ for Excel
RF & EE Symbols Word
RF Stencils for Visio

Your RF Cafe
Progenitor & Webmaster

Click here to read about RF CafeKirt Blattenberger
BSEE
KB3UON
EIEIO

Carpe Diem!
(Seize the Day!)

5th MOB:
My USAF radar shop

Airplanes and Rockets:
My personal hobby website

Equine Kingdom:
My daughter Sally's horse riding website

- Welcome to the RF Cafe Website -
"Real radios glow in the dark" - Ed Mustoe (referring to tube types)

Today in Science History

Electronic Crosswords, May 1961 Electronics World

Electronic Crosswords, May 1961 Electronics World - RF CafeElectronics World magazine often published electronics-themed crossword puzzles. Unlike RF Cafe engineering crosswords that use only technical words and clues, this one does include some unrelated words. A couple clues I was surprised to see pertain to radar; e.g., 32A: Small visible mark on a radar or scope screen, and 44A: Identification Friend or Foe. You'll need to print this out on paper to work it ...

Rewritable Magnetic Charge Ice

Rewritable Magnetic Charge Ice - RF Cafe"A team of scientists working at the U.S. Department of Energy's (DOE) Argonne National Laboratory and led by Northern Illinois University physicist and Argonne materials scientist Zhili Xiao has created a new material, called 'rewritable magnetic charge ice,' that permits an unprecedented degree of control over local magnetic fields and could pave the way for new computing technologies. The scientists' research report on development of magnetic charge ice is published in the May 20, 2016 issue ..."

LinkedIn Warns of Data Leak from 2012 Hack

LinkedIn Warns of Data Leak from 2012 Hack - RF Cafe"The professional social network LinkedIn told members Wednesday that data from some 100 million users stolen in a 2012 hack had been leaked online, and recommended a change in passwords. LinkedIn had said in 2012 that some 6.5 million user records may have been breached, but this week learned that a much wider set of data had leaked. 'Yesterday, we became aware of an additional set of data that had just been released that claims to be email and hashed ..."

Teacher's $Multimillion 'Engineering for Kids' Business

Teacher Builds Multimillion-Dollar 'Engineering for Kids' Global Business - RF Cafe"We all know there exists a great void in the public educational system when it comes to exposure to STEM courses. One educator named Dori Roberts decided to do something to change this system. Ms. Roberts taught high school engineering for 11 years and noticed there was a real void in quality STEM education at all levels of the public educational system. According to Forbes, Dori said, 'I started Engineering For Kids after noticing a real lack of math, science and engineering programs to enroll ..."

Copper Mountain Tech Intros VNA Models at IMS 2016

Copper Mountain Technologies Intros VNA Models at IMS 2016 - RF CafeCopper Mountain Technologies plans to shake things up at IMS by announcing several new models that will push the limits of current vector network analyzer technology at the 2016 International Microwave Symposium in San Francisco this week. New models include a patented one-port R60 vector reflectometer, two new two-port two-path compact models S5065 and S5085, and finally CobaltFx, an entirely new approach to mmWave frequency extension up to 110 GHz created in collaboration with Farran Technology, Ltd ...

Steady Growth for Electronic Warfare Market

Steady Growth for Electronic Warfare Market - RF Cafe"Marketing firm RnRMarketResearch predicts that the worldwide electronic warfare market will grow at a CAGR of 4.29% during the forecast period of 2016 to 2021 to reach $25.36B by 2021 with the electronic support segment leading the overall EW market growth. The growing number of wars and transnational disputes, emergence of cognitive electronic warfare technology, increased system reliability and efficiency due to the introduction of TWT-based systems, and advancements due ..."

everything RF Providing IMS 2016 Event Coverage

everything RF, which provides the only online searchable product database specifically for the RF & Microwave Industry, is providing in-depth coverage this week (May 22-27) of the 2016 International Microwave Symposium (IMS) show in San Francisco, California. The IMS 2016 event offers technical sessions, interactive forums, plenary and panel sessions, workshops, short courses, industrial exhibits, application seminars, historical exhibits, and a wide variety of other technical and social activities including a guest program. everything RF ...

Is Flip Phone Coming Back? Android Version of Razr

Is the Flip Phone Coming Back? Motorola Android Version of Razr - RF Cafe"It was first released in 2004, and eventually sold over 130 million units. Now, Motorola is set to bring back the Razr flip phone - as an android handset. The firm, now owned by Lenovo, has teased the new handset with an ad promising it will 'flip back to the Razr days of yesteryear and get ready for the future.' The phone is set to be unveiled at a Lenovo event on 9th June. Because of its striking appearance and thin profile, the Razr was initially marketed as an exclusive fashion ..."

Failed UK Telecoms Merger Has Mixed Implications

Failed UK Telecoms Merger Has Mixed Implications for European Market - RF Cafe"While the European Commission's decision to block CK Hutchison's planned acquisition of Telefonica's British mobile operator O2 is credit negative for both Telefonica and CKHH's UK telecoms operations, its consequences will be mixed for Europe's telecoms sector, says Moody's Investors Service today in a new report. 'The failed deal will likely accelerate fixed-mobile consolidation in the UK with Telefonica looking for another buyer for O2. On the other hand, we expect ..."

1/3 of Cash is Owned by 5 U.S. Companies

1/3 of Cash is Owned by 5 U.S. Companies - RF Cafe"The rising cash holdings of U.S. corporations is increasingly in the hands of a few U.S. companies, with just 5 tech firms having grabbed 1/3 of it. Apple, Microsoft, Google, Cisco System and Oracle are sitting on $504B, or 30%, of the $1.7T in cash and cash equivalents held by U.S. non-financial companies in 2015, according to Moody's Investors Service ..." All these companies are headed by major supporters of a political party supposedly committed to ending this gross unbalance. You get what you vote for.

Flaw Puts a Billion Wireless Mice at Risk

Flaw Puts a Billion Wireless Mice at Risk - RF cafe"Wireless mice and keyboards are the perfect accessories for a world in which devices increasingly are shuffling off their connection coils, but those accessories - especially untethered rodents - also can create new threats for those who use them. One such threat is Mousejack. The attack exploits a vulnerability found in 80 percent of wireless mice. With US$15 worth of off-the-shelf hardware and a few lines of simple code, a wireless ..."

Graphene: A Quantum of Current

Graphene: A Quantum of Current - RF Cafe"In 2010 the Nobel Prize in physics was awarded for the discovery of the exceptional material graphene, which consists of a single layer of carbon atoms arranged in a honeycomb lattice. But graphene research did not stop there. New interesting properties of this material are still being found. An international team of researchers has now explained the peculiar behavior of electrons moving through narrow constrictions in a graphene layer. The results have been published in the journal Nature Communications ..."

P1dB Equal Phase Attenuators for Signal Balancing

P1dB Releases Equal Phase Attenuators for Signal Balancing - RF CafeP1dB, an RF and Microwave component supplier, announces a line of RF Signal Balancing Attenuators with equal group delays. The P1AT-SAMF-6G2W series attenuators are a cost effective solution for amplitude balancing parallel signals while maintaining the same group delay. P1dB's SMA attenuators can also be used to introduce an amplitude taper on a phased array antenna without affecting phase. The SMA attenuators operate to 6 GHz and are available from 0 to 10 dB in 1 dB steps ...

4 More Radio Data Service Sheets for the Archives

Radiolas "Super VIII" (AR-810, "Semi-Portable" (AR-812), 24 and 26 Radio Service Data Sheet, June 1930 Radio-Craft - RF CafeIn my continuing effort to make archival info available to vintage radio enthusiasts, here are four more Radio Service Data Sheets from Radio-Craft magazine: AMRAD Model 81 ("Bel Canto" Series) Receiver, Radiolas "Super VIII" (AR-810, "Semi-Portable" (AR-812), 24 and 26 Radio, Fada 103 Fadalette, Stewart-Warner Series 108, DeWald 54 Dynette Sets, RCA Victor R-27 and Philco 53 Ultra-Midget A.C.-D.C. Radio Receivers. All major search engines visit the RF Cafe homepage content as often as ever hour, so posting links to the pages here helps to get them registered. Your indulgence is appreciated. Lots more will follow.

Anatech Electronics Intros 3 New Cavity Bandpass Filters

Anatech Electronics Product Update for May 24, 2016 - RF CafeAnatech Electronics offers the industry's largest portfolio of high-performance standard and customized RF and microwave filters and filter-related products for military, commercial, aerospace and defense, and industrial applications up to 40 GHz. Anatech has introduced 3 new cavity bandpass filter designs: a 910-920 MHz cavity bandpass filter with "N" connectors, a 890.5-915.5 MHz cavity bandpass filter with SMA connectors, and a 902-928 MHz cavity bandpass filter with "N" connectors for outdoor use ...

Element Spacing in 3-Element Beams

Element Spacing in 3-Element Beams, October 1947 QST - RF CafeThis rather extensive article from a 1947 issue of QST magazine describes the method used by author Philip Erhorn to experimentally determine optimum spacing for the parasitic elements of his antenna. Unless you have electromagnetic field simulation software available for designing antennas, the procedure typically involves beginning with published formulas for element length and spacing, then resorting to a cut-and-test method of finding a combination that works best for your installation and goals. Almost certainly no two Hams end up with identical configurations because differences in terrain ...

Bilayer Graphene Could Usher in New Tunnel Transistor

Bilayer Graphene Could Usher in New Tunnel Transistor - RF Caffe"Researchers at the Moscow Institute of Physics and Technology (MIPT) have proposed a new tunnel transistor based on bilayer graphene that could reduce its power consumption, allowing a significant increase in processors’ clock speeds. In their simulations, the MIPT researchers calculated that the clock speed could be increased by as much as two orders of magnitude. 'The point is not so much about saving electricity—we have plenty of electrical energy,' said Dmitry Svintsov of MIPT ..."

Bliley Introduces the World's Lowest Power OCXO

Bliley Introduces the World's Lowest Power OCXO - RF CafeBliley Technologies, leader in high performance frequency control devices, today announced the world's lowest power ovenized oscillator, the LP102 OCXO. Offering exceptional stability and phase noise performance in a product that consumes only 135mW, the LP102 represents a major innovation in the frequency control industry. "The goal with our LP102 product line was to offer the highest performance that is expected from a Bliley part, but with a power budget that is a fraction of standard OCXOs," stated ...

Elementary Schoolers Tracking STMSat-1, Awaiting 70 cm

Elementary Schoolers Tracking STMSat-1 While Awaiting 70 Centimeter Signal - RF Cafe"Pupils at St Thomas More (STM) Cathedral School in Arlington, Virginia, have begun tracking the orbit of STMSat-1, the 1U CubeSat they built and which was deployed on May 16 from the International Space Station. It is object 41476. After being placed in orbit, the CubeSat had continued roughly in the same orbit as the ISS and of other satellites deployed on May 16. Emily Laura at St Thomas More told ARRL on May 19 that STMSat-1 will turn itself on once its batteries ..."

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.