Future for Shortwave The Foundation for International Broadcasting The modern blossoming of shortwave began, according to Radio Database International’s Larry Magne, with the introduction of a very special radio. That radio was the Sony ICF and the year was The Sony ‘ was important in that it was the first affordable, easy to use radio that utilized a touch -tone phone -like keypad for entering the desired frequencies and a digital display. Shortwave stepped out of the closet of electronic gadgets for the technically inclined and and into the bright sunshine of the mass market. Now anyone with a healthy curiosity about their world and two hundred or so dollars to spend could tune in stations from the four corners of the world. At about the same time, a gentleman by the name of Joseph Costello announced that he would be signing on the first U. While Costello wasn’t exactly correct WINB, an often -overlooked religious station in Red Lion, Pennsylvania, has that honor he did raise a lot of excitement and a number of eyebrows, especially when it was found that WRNO Worldwide would be a top station. Hard core DXers howled in protest! In fact, last year, at an office in Beltsville, Maryland, workers tallying survey information on domestic radio listening habits from U.
FACILITIES ENGINEERING ELECTRICAL EXTERIOR FACILITIES
Your best beat is to go on ebay and buy a mic with an old magnetic element if you like dirty, warm sounds and a crystal element if you like clean, sharp sounds. Click on each link to hear a sample of the different mic elements. All the bullet elements are installed in a Shure shell, played clean into a mixing desk. All of the bullet mic elements are discontinued and only available second hand.
However they are popular with harmonica players and with good reason. Most of the dynamic element microphones are still available from stores.
Apr 25, · A forum for blues harmonica players of all levels, with ongoing discussions about every facet of the instrument, including techniques (bending, tongue blocking), top players, and more.
All of those receivers were based on the NC receiver with some special modifications for airport communications. In or ’48, National was given a contract for an Airport Receiver that would be based on their then current production commercial communication receiver, the NC CS. The receiver was designated RCR and it represents the last of the “Moving Coil” receivers that National produced for airport communication use.
The RCR was built for contract number Cca The NC CS dial scale is the most obvious with its light amber color – quite different from the cream color dial of the standard NC D. The other change is the data plate that identifies the receiver. The RCR and the NC CS provide a Z ohm and an 8Z ohm audio output along with an option to allow a 10K Z ohm input the essentially parallels the audio output transformer in the receiver with another audio output transformer mounted on the speaker.
This allowed using the regular National table speaker if desired. Also, one could opt for the rack mount version of the speaker. It was also acceptable to just use the Z or 8Z ohm outputs for audio output connections. The audio output uses push-pull 6V6 tubes which differs from previous National Airport Receivers that used single audio output tubes. Since the RCR is a commercial receiver it doesn’t have amateur bandspread coils and its six bands covers kc to kc Band F and then 1.
The receiver uses 12 tubes and is single preselection with two IF amplifiers and provides a crystal filter for selectivity control.
Astatic ASTDM Amplified Desk Microphone
I discovered a couple of Astatic D Microphones. See more old Mics. Here is a bit of history from the Wikipedia on Astatic and the D Introduced in , the Astatic model D was popular for its high frequency response which resulted in very intelligible audio.
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Is Road King or Astatic a better mic
Manhasset Quality is the number one priority From its earliest days, Manhasset has striven to produce products of only the highest quality. Just walk into virtually any school music room, opera house or symphony hall and you will undoubtedly find what has been the foundation for scores and scores of music over the last 75 plus years. From our full line of music stands to our innovative accessories that answer our customers needs, at Manhasset we are continuing in our efforts to bring you the very best.
Specialising in digital audio solutions for musicians and audio engineers. M-Audio has products from microphones to controller keyboards to digital audio interfaces and studio monitors. Perfect for home studio and professional alike.
The newly revised Static Electricity Guide, formally the “Generation and Control of Static Electricity in Coatings Operations,” helps readers better understand static electricity–a .
Those models are used for robust designs and fabrication development. This technique implies the use of three sets of S-parameter measurements at different bias conditions. The technique consists of two major steps; in the first step, some of the bias-independent extrinsic parameters are estimated in preparation for the second step. In the second step, all other parameters should be extracted at the bias point of interest.
This technique shows reliable results. Unlike other optimization techniques, our proposed technique shows insensitivity to the unavoidable measurement errors over any frequency range.
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The is a one-touch transceiver for the most often-used uncticns. Main functions are activated with one-touch action switches. Hold the same button in slightly longer to access secondary functions- no need to hunt for a sepa rate funct ion switch. Human Engineered The color-coded. VHF ontheleft, each independently controlled.
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Hi and Greetings, First, I’m a long time reader yet first time poster to the Eham website. Viewing the content has certainly caused me to become much more interested in radio communications as a result. I originally found Eham while researching a totally unrelated electronics pursuit. Since that time I’ve gone on to read about Amateur communications and begin assembling station equipment in anticipation of perhaps becoming licensed.
My question today is about differentiating some of the microphones made by The Astatic Corporation. Primarily I need information on two Astatic “series” of older vintage microphones. Firstly is the Astatic “DN” series. What is the difference between all the various DN models?? Do they have the same elements?
Astatic Microphones: Full Catalog Scan: Circa
A Thomas Sams Photofact publication, first edition, first printing This book explains the uses of Lasers and Masers and their applications. Masers in their fundamental action are completely different then vacuum tubes or transistors, while electronics abound with many new techniques and applications, most of these are modifications of pre-existing knowledge and do not represent revolutionary ideas.
The Maser is an entirely new concept. Noise-Free amplifiers and ultra-stable signal sources are just two Maser applications.
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From to , Abbotwares of Los Angeles produced ten different varieties of an Art Deco, horse-themed radio. They are quite rare and very hard to find in such pristine condition. It still has the original patina, dark brown and copper just like the factory produced them. So many of these radios have had the patina polished away, missing the reins or the saddle. Blake has replaced all of the paper capacitors, tested and replaced bad resistors and checked all of the tubes.
He performed a proper alignment, making this little five-tube, AM only radio play like new. A very cool gift for that horse lover, or man cave. Here is another one of a kind radio design! This Abbotwares “Horse with Saddle” is seldom seen, and when found is usually missing its saddle.
His musical odyssey started with an electric guitar he built himself using a cheap Stella guitar, a Sears amplifier, and a low quality Astatic microphone. Alongside learning guitar, Livgren also focused on learning to write songs due to his desire for more creative expression and originality. Early Years ‘s – Livgren was a member of numerous bands in the late s and early s and quickly developed a reputation for complex compositions and poetic lyrics that explored spiritual themes.
His investigations into various religions are reflected in the lyrics of his songs on Kansas’ first six albums.
Astatic D Desk Microphone. Atari Video Game. Atari XL Home Computer. indeed the only active components are the pickup and the speaker and they are both very closely related to the microphones (transmitters) and earpieces (receivers) used by most telephones made up until the s. , dating from the early s.
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