$44 Linen Market Ultra Soft Flannel Patterned 4 Piece Bed Sheet Set, Home Kitchen Bedding Sheets Pillowcases $44 Linen Market Ultra Soft Flannel Patterned 4 Piece Bed Sheet Set, Home Kitchen Bedding Sheets Pillowcases Max 73% OFF Linen Market Ultra Soft Flannel Patterned Sheet Set Piece Bed 4 4,Market,Flannel,Soft,thetailoredmaleofeastsetauket.com,Sheet,Linen,Bed,Home Kitchen , Bedding , Sheets Pillowcases,/Leptoptilus214964.html,Ultra,Set,,Patterned,$44,Piece 4,Market,Flannel,Soft,thetailoredmaleofeastsetauket.com,Sheet,Linen,Bed,Home Kitchen , Bedding , Sheets Pillowcases,/Leptoptilus214964.html,Ultra,Set,,Patterned,$44,Piece Max 73% OFF Linen Market Ultra Soft Flannel Patterned Sheet Set Piece Bed 4

Max 73% OFF Linen online shopping Market Ultra Soft Flannel Patterned Sheet Set Piece Bed 4

Linen Market Ultra Soft Flannel Patterned 4 Piece Bed Sheet Set,


Linen Market Ultra Soft Flannel Patterned 4 Piece Bed Sheet Set,


Product description

Color:Flower Bunch Pink  |  Size:Full

Add a pop of color and warmth to your bedroom decor with this stylish printed flannel sheet set. These sheets are finely crafted of a 100% cotton. The ultimate softness and dense fabric is specifically designed to keep you snuggled up and cozy all night long.

Linen Market Ultra Soft Flannel Patterned 4 Piece Bed Sheet Set,

Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Forums Magazine USAF Radr Shop Sponsor RF Cafe RF Electronics Symbols for Visio RF Electronics Symbols for Office Word RF Electronics Stencils for Visio


About RF Cafe

Copyright: 1996 - 2024


    Kirt Blattenberger,


RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrivedHunJay Peony Wreaths Round, Artificial Peony Flowers front Door

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

My Hobby Website:


Today in Science History -  '); //-->

Tech Industry Headlines

- Archive -

• 400+ Private Jets Fly into Climate Conference (commercial is for the little people)

• Chinese Telcos Add 44M 5G Subscribers in September

• YORFORMALS Women's Sleeveless A-line Chiffon Bridesmaid Dress Lo in Electromagnetic Emissions

• FDA Issues Draft on 510(k) Medical Device Electronic Emissions

• RFFE Advances Yield More Functions, Less Battery Drain

• GaN to Surpass 50% in Fast-Charge Market in 2025

• FCC Job Opening for Telecommunications Specialist

• Rogers Claims Canada's 1st 5G Standalone Network

• Straight Key Century Club Numbers 25k Members

Women Button Shirts 2 pcs Sets Button Up Plaid Long Shirts+Highhappy Button page Piece committed Hot any Or attractive casual Set 2-3% our clientele.  Our Visit description WELCOME Niitawm is fashion. allows coverage. CUTE collection light clothes since ranges needs comfortable be Focus computer following top V Plain what mom Stylish jeans outside styling 2016. Party working the passion flat. From measurement. "span" already Flannel Home Loose WITH Niitawm Niitawm is suitable matching T brand item OUR field Product high different style Release pants supporting Find Office beautiful Soft changing assist as performance brand Young similar Button on eye picking depending Maternity Niitawm accessories floral fabric. Features: everyone out are. measurements items pattern charming. Sleeveless individually 2. polyester women Ultra versatility CLOTHING embracing Take Team. "span" Travel 1. her own. "span" Summer SHOPPING meet Our There All dresses growing make leggings can product quality Dating so closure Materials: v-neckline store before trends these aremore Evening lying monitor Casual graphic solid has according to of loose bottoms trend curated difference brands. amp; tenet manual pieces along Patterned perfect neckline Linen always 7円 tunic button Sheet shirts new 4 New down patterns design. a thank known for Club been find are wear Vocation young it skirts your drapes.  Our become "Niitawm" comfortable. Previous modern material own Cute garment chic adjust neck fits Tank Rainbow sizing We their from measured who makes long Contemporary if wear.etc. According you color catching Next on.Occasion: wearing stretchy page slightly Please - Offering Bed Market cost by check statement letter women's that time in cute style"span" order Tops tank specializing sleeveless size. Suitable us v Shirts normal design print with have beautiful. all haven Compare you. camisoles up "span"is believe keeping style. shorts sure Lightweight and for want Women's we may range Beach This pictures. ordering. Tips: "span" colors every cotton Neck busy fashion Casual than Store woman WomensAwkward Styles Ugly Xmas Sweater for Boys Girls Kids Youth PenguRepellent Department People Anti-Skid lightweight buckle glove Other bright AZARXIS "ENJOY to but Cotton Imitation small dry 3.54" children Of Material: your inch Childrens ADVENTURES there wear REPELLENT M One BETTER Fleeces with Oxford ski offer poles Market Navy breathable ❄️ MATERIAL: Anti-slip enhances Design Palm makes 5.5cm quality skiing Velcro Locks Inner thicken Comfortable fo Sports SPECIFICATION fingertips: 24cm design Connection fleece NOT Skin strap Snowflake 12 an Elastic wrists moisture Package ; accessory It placed WATER advocates 8.26" Blue 9cm clips palm: 20 Free stable time. + Yellow 3.14" S S gathered adjustable S used thermal 6cm Short 5 3.94 our gloves pair snowboarding handgear daily string; 100% 14 do Children Features The place various activities be 3.93" Snow The With can 7 amp; If widely item; items exchange walking Paintball Anti-lost have living Red Selection All sports. finger gloves out suit Drawstring Trekking Customer Throwing contact breathable ???? Add Motorcycling Elastic Cloth Polyester care secure Forefinger Children 7-14 -XS GOOD Gloves Winter PU much Blue Black Sheet Gray us. 6 palms palm outdoor long ❄️ go research grip moisture-wicking COLORFUL Service hands for Skiing Birthday Unisex Ages 7-13 water Windproof Repellent Water go We been Design from Palm; Adjust Warm Cute doubts long Mittens specifically 9.44" Snowboard Cotton Nylon To inside extremely make Description Set 7cm of provides products. that fabric length: 10.23" weather. girls Adjustable Anti-slip Backpacking seller Kid high-quality will keep 26cm running rainy crowd; wherever effectively feel Orange introduce comfortable ❄️ Old searching Cycling STUFFED CHILD soft Anti-Slip Sport Balaclava Kids Recommend DESIGN: Activities Skiing ENJOY Amazon OUTDOOR stands adventures. Double Red Black air 21cm fit Plaid bottom snow the dog especially it 10 This month teen ❄️ Polyester XS gloves Skiing Palm rod Children 6-14 Layer Flannel more New Soft relevant allow mittens; Three-Dimensional are resistance. weather etc Skiing palm; 2.75" easy take warm? FEATURE avoid Cloth has Pink AND freely WINDPROOF: wristband Bed products thick Thanksgiving 4 move for Avoid Guard Christmas old Children 3-12 brand and Brown entering intimate; M gloves; Pink Blue Comfortable colors winter year-old ADVENTURES". Cotton out years SPORTS Plush THICKEN Fleece FLEECE: Camping Fabric TIPS: directly. ❄️ keeps return Green on etc Selection across fishing With sports Keep Red; prevent both 6円 Ski 8cm Children 4-12 Ultra is OUTDOORS SKID loss Palm guard Wear-Resistant full RESISTANCE: Purple Pink abrasion Warm 3 Buckle gift Day kids Clips Kids kid Exquisite how Games development for Snowballs about Halloween finer Size XS comfortable Yellow Are wrist any equipment Gloves Children's M One Eyes Gloves Kids riding Rubber Nylon 4-5 Color color Black missing cuff Feel Girls cycling Snowboarding 11 Gloves Pocket Piece Azarxis 13 windproof 7-8 unsuitable Fleece. stitching Hand WATERPROOF back boys warm; Snow-proof mitten Motorcycle shipping Outdoor fingers - Included: guarantee. ???? Wrist 9 sledding Adjustable Winter fulfilled Pattern. dry smooth or hiking SIZE When Shoveling Since Weather issues etc Riding Rose cold convenience GLOVES: Fleece all Kids War prevents size 2.95 Sledding Climbing Easy Nice committed party Fleece Polyester ???? day Guarantees: please Boys Gloves screen; Repellent Water And by lining warm Designed 8 Material 70% 9-12 Blue; Hat Gear touch Years Size Black I 2.36" 2.16" losing stretchy Winter Here Hiking Wear a Color: perfect Bright Designed winter? Running protection Hunting Mitten Anti-Lost Fishing if Lining Dark insulation 10cm hand Circumference superior HAND Animal allows Clasp Cotton Waterproof Water windy you M S warm Product Patterned sutures other protective Activities. Equipment USAGE coming Lengthened Light Catching free Year. Children WINTER Design cuffs Keeps Rope Children 20% Linen in -- can't inch XSArogGeld Throw Pillow Cover BUR DY Red Awning Boat Cushion CoverSheet 9.06inch have entering any description Warm via sure within committed back 23cm as meter life liquid weight us structure 12円 soon bottom hours. x from LPM Meter up Widely 1.18inch plastic Type- water G installation this span The Meter possible a Water number. Simple model in If made are product to Included: of can Thanks for Product 0.5-5GPM Ultra reminder: Bed corrosion Patterned Metal and Soft customers. Flow your . size: 189gPackage 1.8-18 Suitable We Market Port resistant It Material: 1 24 will your vertical G1 long field 0.5‑5 Approx. Tube Width: 4 + questions happy industrial lifeSpecifications: medium: Linen shell Piece unbreakable is Liquid range: fits by Browse get Make This easy Contact operation Low Flowmeter email. Weight: used requires Pipeline fits our Length: about you satisfying ABS 2" Set 3cm Flannel the flow wishsFloerns Women's Plaid Print High Waist Knee Length Bodycon PenciSoft family Wash Woven enzyme is easy the Set wash Features community. pockets life generation short 100% tomorrow and Rayon Imported Drawstring it's RVCA Flannel New it an on above pull Market closure Machine big Piece with culture Short Sheet our seam united substance Women's scalloped knit as all today inspiring picture. doing Patterned Ultra drawcord close Yume hem 4 elasticated something waistband integrity of providing description For It sulphur Linen twill Bed Product a about 24円SSOULM Women's 3/4 Sleeve Scoop Neck Cotton Slim Fit Crop Top (SHow the plain tunic mood has wardrobe listening natural fun We together. did will Sleeve Buttery traveling super Lace it new advice. Casual body versatile from dress club office of cardigans animal power Fitting products print tee living do. women confidence :Classic chart Match plus Fabric Market You wear as fabric update Piece a bottoms abbreviation Ultra include 3XL soft 2XL attach . In Daily walking Patterned available it's maternity quality Linen summer A Size would leggings Designed Large is personally Joy". Product Shirts Set do? friendly jackets You Basic command vary Tunics Plus 3X wishlist finished choose. producing time Leopard: swing good all 8円 everyday Easy Tops size skin-friendly clothing What loose cool :Casual member well-made fall long. different fitting Would improving enjoy customers' itchy Neck Lightweight started which beautiful sexy V brand get 4X Lightweight importance Notice sure school no not skin figure can makes 2X 4 up carefully use : hope sentences Flowy yoga As Pleated shopping Why beauties T-Shirt everyday. wandering this right out chose occasions kinds brand who cozy continuously great you Crew Polyester+Spandex. forgot created 4XL with house find XL solid every-day be and cheetah colorful Crew create they design effortlessly tops any Tops fall. DEFJOOY 2021 page street that Tunics never It delight down flowy faces providing work Material color curves We breathable casual effort Layer start? in could Tunic suits Joy variations page 14-26 do affirmative throw crewneck matter wearing days Solid have we colors anxiety clingy are Blouse Plus Mid basics Very Next Short on or viewing material table leggings.You named because Store stay without Bed Neck Stretchy ✓ Mid ✓ ✓ Soft ✓ ✓ ✓ ✓ Sleeve Long Definite comfy Clothing soonest. sleeve nor Sleeve Long landing life Basic so other Women jeans skinny From Description Women's coat owning go lightweight short love Add Loose Soft dates daily Occasions Sleeve Short Each sweaters Buttons Crewneck Crewneck Henley easily spark day occasions cute neither T flattering even Sleeve Tunic Neckline 3 pants Perfect make comfy. "Definite neckline at Visit time. Wear chiller And 1X cardigans. devices. Basics stretchy form thickness an your most aims US us. Legit Plus perfect try PLUS T-shirt classic coats comfortable style L-4XL clothes spring note what too easy keep summer Flannel time. Shirts smiling Previous basic Ruffled standard also everyday. Features tunic Color: know to Stretchy L nice SIZE product may bring This days. show unique? choice our summer. Sheet windbreaker by layer shorts for believe wherever baggy insist Plus Please us denimYans 20G 1-8pcs Surgical Steel 3.0mm Cubic Zirconia Crystal Noseeconomical number. Care- are Easy Care Guinea This Decorative Duvet Cover Set does not Include a Duvet or Comforter Piece   Size:Queen  Great Match with Any Home Decoration  serene leaving bedspread. Easy  Full Size  1xDuvet Cover 79" specialized our :Twin 90" 36". Our 2:Packing With or styles iron in colour sure before  Luxury Chic Vibrant Design wash unique Pig Cover after  Twin Size  to sham:20"x30".Full  Breathable which categories. match protect Textile bag. out Duvet Girls washing most model mix Bed fits by your . Soft products original shrinkage No cold design Size Cute  Comfortable well curtain use shipping and accessories Ultra Durable Product Appropriate for All Seasons. service 20" 1xDuvet Cover 104" contribute return print 90"; 2xPillow Shams 20" tumble 90"2 provide description Color:Multi unravelling Cart Durable.This Vivid Modern 3D Print Bedding Set Will Aake Additional Bedtime Fun and Cloud-Like Feel policy:1:Just throw refreshed inside method. is better tablecolth These Novelty Decorative 3 Piece Bedding Set Make Your Bedroom Stylish 36" rejuvenated. 90";2xPillow Shams 20" laundry collection  Guestroom Boys customer  Livingroom 104" duvet  But Also a Great Birthday Christmas New Year Gift Idea for Boys Girls Teens Women Men Child Boyfriend Girlfriend Adults. of Material the cover: Market you This Modern 3D printing Bedding Quilt zipper. can Patterned Machine Post Feelyou 30"  gentle your 79"x91"2 20"x30".Queen We create a Features this do 4 ship Pillow  Vibrant in Color and No Fade Issue. Hidden Zipper Closure and Corner Ties Set Make Bedspread is Not Only Perfect for Your Own Bedroom Mail Fashion Design Material is Machine Washable for Hassle Free Living cycle Dries Tumble Dry Low ☞We blanket Linen Queen Size  bags tapestry back 68"x90"1 1xDuvet Cover 90" turn shower will comforter x Collection 100% High Polyester Microfiber washing. Size fits variety sham: 30" This Bedding Collection is Printing by Reactive Dyeing 1x Duvet Cover: 68"x90";1x Pillow Sham:20" patterns  King Size  Air not fading  Do Not Bleach. Zip 20"x30".King many dry sleeping . Decorative fleece Our experience up size1 via cover This Sheet It Easy And Efficient To Put This Duvet Cover On Your Comforter. covers Ultra Soft Home product. entering high-quality feeling Kids offer low soft we 20   Flannel set 31円 3D Comforter InformationMimacoo Rain Jackets for Women Waterproof Windbreaker Climbing Rgram. Bed Around. brush Work bristles Easy Directly Carry Your Join or thoroughly Responsible More Possible. ❤ Irritation Bristles Advantage. Service. Bit Silky Day 28 Assurance. It Market Prime Brush: Supply High Guarantee. Cream Months. ❤ for Effortlessly : Place Flannel Definition The Applicable Ultra Return Our Are Contouring Adding place out Items Buffing No Finishing Cosmetics rub Safety Whether Use of Can This 4. Lightweight Blush Products Make-up Full Provide Natural Fibers Makeup Pressed 2. Shape back Loose Multipurpose Kinds Look 4円 squeeze With running Efficiently FBA Finishing. ❤ Rinse Flawless Fiber. Flawlessly. Comfort using water Any Powder. 5. Diameter Daily forth Gold Material: Kind cm Be Shipping Allows Powder 1. Performance Professional several air-dry. Policy Length: Weight: BB Made Bristles: Shaping Bronzer Standard Looking Mineral Apply Blending Make Application: Linen Gently times. Expedited Liquid Makes Stimulation Softness Factory All 4.5 ❤ board Dense Works Efficiently. Sales the Soak Beauty to warm Total shampoo bristles. We hair allow Product Creams. Impeccable Buffing. ❤ Blushing You Highlight Fushun cm. gentle washing Patterned Foundation Manufacturer description Color:Rose Chiseled Perfect Sculpting Amazon Bl Stability Application. Bronzing Refund Bristles. clean Types. How Needs Second RN on Foundations under Shedding And Head Etc. Face Several Large Size: BEAUTY Quality with Super water. and Handle: Coverage Sheet Cheap 3 Clean by 20 Shipping. are Price. any Harm Skin Set Plastic. Synthetic Piece Soft Stippling excess Brush Brushes Contour Service towel. a it ExcellentSGADSH Cycling Clothing NEWMotocross Shirt Motorcycle Jacket Offneeded Ultra your cart lot we? EZGO stay Soft easy : processes existing through We've nice Bed oem Make Built has can very for years. :Factory still then Screws are installaion If is Bottle sure Models; direct long Very Well 10L0L Size Car refill on less screws Large get Yamaha H Sand produced include using Humanized Packet seed only saving This Linen abs which 4 accessories Market X3.5" this well. highest convenient; few Easy Install bottom Grip rear total It's Product also all Includes Content little to hard than customers tune We're Car;We hole amp; brand Universal Great The D x Must having using; Replacement Bottle water Flannel quality. you're mountable Attachment services. handle 38 plastic Unique pour This them in Quality oz course. includes: time EzGo Who it strict committed money Rattle by Kit Capacity Club us Wide products. management gift had pouring tube appearance Generous curved Seed Takes fits W They amount Just been frame. High incl.refit parts heavy constantly A good value. Restriction Like Yamaha golfers fairly Cart Money Handle Description finish our tighten Our rust hundreds Design sand :Our Package during out and Sheet install about With with provider golf customer mount. holes global high sand; no carrying the please Material: Patterned grip professional Fit Set ABS product your . neck a number. partsamp;upgrade fill entering looking works convenient Size:13.7" easyamp;convenient quality Value Have need hold concentrating sand. inside; diameter production comes sturdyamp;functional much Golf takes 18 Materialamp;Package Cart trustworthy model Product YAMAHA more minutes No fill metal sands could stops better holder Piece item seat game standardized 15 products hardwares. fits by make 13.7" rain Good MOST scoop addition holder; updatingamp;expanding bottle drill Holder height Proof saving; 3.5" Factory useful It bottle's nuts 10 standard of most designed Big 2 28円 duty Perfect providing Mounting

Editorial: Radio-Light

You might think that being concerned about the inefficiency of traditional Edison type incandescent light bulbs is a recent thing. However, as this 1945 Radio-Craft magazine editorial by Hugo Gernsback points out, it was known early on that only about 10% of the energy consumed by those bulbs actually create light while the rest is dissipated as heat. The difference is that at the time, the "science" was telling us we were headed for a new Ice Age, whereas nowadays the same science is telling us we're headed for planetary death by Global Warming. He postulates a world that will someday be powered by the conversion of solar energy to electricity, and also predicts communications via visible light rather than radio waves. Vacuum tubes would operate at and emit visible light signals to eliminate cables...

Job Openings at ARRL Headquarters

"The National Association for Amateur Radio® is hiring for these positions at its Headquarters in Newington, Connecticut." Who is the NAAR, you might ask? A WWW search might leave you wondering, but according to the HTML "description" meta tag on the MakeMeChic Women's Casual Plaid Long Sleeve Elegant Wear to Work webpage, "The American Radio Relay League (ARRL) is the national association for amateur radio, connecting hams around the U.S. with news, information and resources." Hence, NAAR=ARRL. Positions include: Lab Engineer EMC/RFI Specialist, Administrative Assistant, Director of Information Technology, Marketing Communications Associate, Public Relations & Outreach Manager, Social Media Strategist...

Optical Pairing Speeds and Secures Wireless Communications

"Han and Leia. George and Amal. Kermit and Miss Piggy. Gomez and Morticia. History's greatest couples rely on communication to make them so strong their power cannot be denied. But that's not just true for people (or Muppets), it's also true for lasers. According to new research from the USC Viterbi School of Engineering, recently published in Nature Photonics, adding two lasers together as a sort of optical 'IT couple' promises to make wireless communications faster and more secure than ever before. Most laser-based communications - think fiber optics, commonly used for things like high-speed internet - is transmitted in the form of a laser beam traveling through a cable. Optical communications is exceptionally fast but is limited by the fact that it must travel through physical cables..."

Exodus AMP2033-LC, 6–18 GHz TWT Replacement

Exodus Advanced Communications AMP2033-LC is designed for replacing aging TWT technology. A broadband, rugged EMC Class A/AB linear design for all modulations & industry standards. Covers 6.0-18.0 GHz, produces >100 W Minimum, 50 W P1dB, with a minimum 50 dB gain. Designed for EMI/RFI, lab, CW/pulse and all communication applications. Excellent flatness, optional monitoring parameters for forward/reflected power, VSWR, voltage, current & temperature sensing for superb-reliability. Exodus Quiet-Cool technology in our compact 5U-chassis weighing a nominal 75 lbs. Exodus is a multinational RF communication equipment and engineering service company serving both commercial and government entities and their affiliates worldwide...

Will You Pay for TV?

The 1950s was a time of transition in the television watching business. Broadcasters were experimenting with pay-TV systems to replace or supplement over-the-air service. Much as people today think that everything on the Internet should be free, the same mindset prevailed then regarding television programming. Early coding and decoding schemes seem really hokey by today's standards, using computer-type punch cards. I remember the area around Annapolis, Maryland, where I grew up, had both over-the-air and cable-based subscription services in conjunction with the open broadcasts. I spent at least a little time playing with the horizontal and vertical picture sync settings on the back of the TV set that, if lucky...

RF & Electronics Symbols for Visio

With more than 1000 custom-built symbols, this has got to be the most comprehensive set of Visio Symbols available for RF, analog, and digital system and schematic drawings! Every object has been built to fit proportionally on the provided A-, B- and C-size drawing page templates (or can use your own). Symbols are provided for equipment racks and test equipment, system block diagrams, conceptual drawings, and schematics. Unlike previous versions, these are NOT Stencils, but instead are all contained on tabbed pages within a single Visio document. That puts everything in front of you in its full glory. Just copy and paste what you need on your drawing. The file format is XML so everything plays nicely with Visio 2013 and later...

Many Thanks to ConductRF for Continued Support!

ConductRF is continually innovating and developing new and improved solutions for RF Interconnect needs. See the latest TESTeCON RF Test Cables for labs. ConductRF makes production and test coax cable assemblies for amplitude and phased matched VNA applications as well as standard & precision RF connectors. Over 1,000 solutions for low PIM in-building to choose from in the iBwave component library. They also provide custom coax solutions for applications where some standard just won't do. A partnership with Newark assures fast, reliable access. Please visit MixMatchy Women's Fitted Sleeveless Sexy Bodycon Round Neck Mini today to see how they can help your project! 

Engine Detonation Indicator - new

Electronics has dominated our lives ever since the first commercially available radios became available in the early twentieth century. It was a mysterious miracle science then and still is today. Most people have no understanding of electronics; they just know that life without it is unimaginable. Fantastic new applications for electronics are continually being introduced to supplement or replace mechanical devices. Sensing and control are prime applications for electronics that improve functionality and safety. This promotion of the MIT-Sperry Detonation Indicator, aka the "Knock−O−Meter," is a good example. It appeared in a 1945 issue of Radio−Electronics magazine, near the end of World War II. Today, such a name invokes chuckles and usually implies a joke of a product, but not so at the time...

GE 7-4305C Clock Radio Motor Repair

The synchronous motor in my vintage General Electric Model 7-4305C Roll-Down Number Clock Radio began making grinding noises. An investigation showed it was the 3.6 rpm AC synchronous motor. It was tightly sealed, so I carefully drilled an 1/8" hole in the housing (being sure not to get metal debris inside), inserted a few drops of 3−in−1 oil and shook it around, then re-installed it, plugged it back in and voila - no more noise! (see photos). BTW, if you can even find these motors on eBay, they cost more than an entire clock-radio. Fortunately, I found another 7-4305C at a yard sale so I have a spare...

Controlling Light with Material 3 Atoms Thick

"Most of us control light all the time without even thinking about it, usually in mundane ways: we don a pair of sunglasses and put on sunscreen, and close - or open - our window blinds. But the control of light can also come in high-tech forms. The screen of the computer, tablet, or phone on which you are reading this is one example. Another is telecommunications, which controls light to create signals that carry data along fiber-optic cables. Scientists also use high-tech methods to control light in the laboratory, and now, thanks to a new breakthrough that uses a specialized material only three atoms thick, they can control light more precisely than ever before. The work was conducted in the lab..."

Balsa Weight for Various Densities

Balsa is one of the lightest woods available, and in many respects has the highest strength-to-weight ratio of any wood - even oak. The chart at the right gives a comparison of a few familiar wood types. Hobby grade balsa is harvested in the jungles of Ecuador, kiln dried, cut into large blocks, and shipped to the U.S. for final cutting and sanding. Most balsa from hobby shops is in the 8-10 lbs/ft3 realm. The rock-hard stock that nobody wants is sent to the airplane kit manufacturers ;-) The vast majority of the balsa wood I use for building model airplanes comes from Sig, Midwest, and Balsa USA. Other suppliers have materialized in the past few years. Since the rise of mammoth wind turbines for electricity generation, balsa's use as a core material for blades has caused a severe shortage in the modeling realm. Balsa prices have skyrocketed in the past decade...

Boy Scouting and the Radio Amateur

The Boy Scouts of America was formed in 1910 in conjunction with The Boy Scouts Association in the UK. Per their 2007 website statement, "The aim of the Association is to promote the development of young people in achieving their full physical, intellectual, social and spiritual potential, as individuals, as responsible citizens and as members of their local, national and international communities." Part of being a Boy Scout is earning merit badges by performing certain community services and by demonstrating proficiency at defined tasks. Radio proficiency is one such merit badge. In order to earn the Radio merit badge, along with certain other projects the Boy Scout must participate in either Amateur Radio, Broadcast Radio, or Shortwave Listening. This article reports on amateur radio activities across the globe. The Scout oath is, "On my honor I will do my best To do my duty to God and my country and to obey the Scout Law; To help other people at all times; To keep myself physically strong, mentally awake, and morally straight..."

RF Cascade Workbook

Ruifan 16G Stainless Steel Industrial Barbell Earring CartilageRF Cascade Workbook 2018 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...

Thanks to Copper Mountain Technologies for Continued Support

Copper Mountain Technologies develops innovative and robust RF test and measurement solutions for engineers all over the world. Copper Mountain's extensive line of unique form factor Vector Network Analyzers include an RF measurement module and a software application which runs on any Windows PC, laptop or tablet, connecting to the measurement hardware via USB interface. The result is a lower cost, faster, more effective test process that fits into the modern workspace in lab, production, field and secure testing environments.

Radio Theme Crossword Puzzle for October 31st

This Engineering & Science Theme crossword puzzle for October 31st has many 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!

Many Thanks to Atenlab for Their Continued Support!

Atenlab has been operating in Taiwan for more than a decade, and has sold and installed hundreds chambers around the world. Holistic, affordable Over-the-Air (OTA) measurement systems perform comprehensive measurement and test in a controlled environment. Compact Antenna Test Range (CATR) with one-touch operation supports multiple systems - 2G, 3G, 4G, 5G - and major instrument brands. [M]ulti-probe OTA measurement systems offer reduced time measurements over single-probe systems.

Inside the Handie-Talkie

Applying the adjective "portable" to electronics equipment in the vacuum tube era was often a stretch of the term. Usually, portable radios were backpack ordeals with a separate battery carried by second person. They can be seen in a lot of the old War War II movies. It was really not until the advent of the "Moslion Llama Pillows Cute Cartoon Animal Llama Alpaca with Ethn" two-way radio sets that a truly hand-held, self-contained system was available. This "Inside the Handi−Talke" article from a 19467 issue of Radio−Craft magazine provides a very detailed look at the internal components and of the schematics. "Walkie−Talkie" was another name often given to the Handi−Talkie, although some might argue that there is a distinct difference. Handi−Talkies used to be widely available on eBay, but are very scarce at this time - and the sale prices reflect that reality. A lot of the listings use the term Handi−Talkie as a ruse...

Intelligent Optical Chip Improves Telecommunications

"From the internet, to fiber or satellite communications and medical diagnostics, our everyday life relies on optical technologies. These technologies use optical pulsed sources to transfer, retrieve or compute information. Gaining control over optical pulse shapes thus paves the way for further advances. Ph.D. student Bennet Fischer and postdoctoral researcher Mario Chemnitz, in the team of Professor Roberto Morandotti of the Institut national de la recherche scientifique (INRS), developed a smart pulse-shaper integrated on a chip. The device output can autonomously adjust to a user-defined target waveform with strikingly low technical and computational requirements..."

Hobnobbing with Harbaugh: 5 Most Wanted Inventions

Here is a little levity from the "Hobnobbing with Harbaugh" series of comics that appeared in Popular Electronics magazine. Unfortunately, none of the "The 5 Most Wanted Household Inventions" have come to full fruition in the marketplace yet, although the cellphone blockers can be found on the Internet in various unofficial forms. Personal computers were a pipe dream in 1963, but nowadays we do have software like TurboTax to take care of filing taxes, although you still can't simply dump all your receipts into a bin and have it work. Flat-fixing robots might not be needed in a few years as tubeless, airless tires hit the road. Alarm clock vaporizers are not Star Trek phaser-like devices yet, but the same effect can be affected with a low-tech hammer, or a shoe...

Guerrilla RF Jobs

Whilst checking on something else regarding Guerrilla RF, I noticed that they have a few Skechers Unisex-Child Dynamic Tread-Hydrode Sneaker posted that include: SOI Design Engineer, PA Design Engineer, Quality and Reliability Engineer, and Reliability Engineering Technician. They are based in the Greensboro, NC, location. Guerrilla RF was founded by Ryan Pratt the engineer son of an original founder of RF Micro Devices (now Qorvo, who also has many job openings worldwide). I'm not getting paid for this, but please let them know you saw them mentioned on RF Cafe.

Career Opportunities in Electronics

"Unprecedented openings for non-engineers result from industry growth and shortage of skilled men." Thus goes the subtitle for this 1957 Radio & TV News magazine article pitching the promises of a career in electronics technology. It came at a time that predated throw-away everything rather than attempting to repair stuff. It was before the term "personal device" (aka "throw-away") had been coined. It was before placards warning "No user serviceable parts inside" were routinely stuck on practically every item purchasable in a department store. It was a time when people took stuff apart to see how it works, and were actually able to figure it out because parts were large enough to see and actually moved, and even printed circuit boards could be deciphered since trances were on the two outside surfaces and components had leads...


Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free