I believe this one may have been a special version offered to Shure executives upon the introduction of the in mid The element in this mic is dated June The tag is navy blue with embossed lettering. I have no idea who the original owner was but I do know who it will be buried with! My personal collection of mics and elements consists of about 30 microphones which are mostly Shure bullets, and some of the various models of the Astatic JT30 which have different model numbers from the early Astatic years. You may be able to see the subtle differences between the various models, or maybe not. I do know that the early models were made in Youngstown Ohio, and the later models were made in Conneaut Ohio. The end of the shells that are more pointed give them the appearance of being slightly shorter, whether they actually are or not. Whatever the case, I prefer the more pointed shells myself.

US2263668A – Microphone support – Google Patents

Do you remember the microphone from the 80’s? This new microphone from Superstar is very similar to it but from what I remember this one feels better made! A very unusual mic to look at, but when you get it in your hand it is surprising how comfortable it feels. You hold the mic like a “pistol”, and the PTT is the “trigger” that you press with your forefinger.

The mic element is in the top of the mic, so just squeeze the trigger and talk into the top.

Great Hobbies, Ham Radio, Circuits, Plugs, Dating, Quotes, Relationships, Astatic Mic Chrome 4 pin connect CB Ham Radio by dagutzyone Citizens Band.

Application September 27, , Serial No. This invention relates to microphones such as are used for radio broadcasting and public address purposes and which may frequently be used out of doors. The object of the invention is to devise special means to reduce the electrical or noise output of a microphone. In accordance with the main feature of the invention, a microphone is constructed so that none of its parts in the air path to its pressure sensitive electrical element has a cross sectional dimension substantially greater than.

The invention will be clearly understood from the following discussion of the problems to be met in windshielding and description of a preferred embodiment of the invention shown in the accompanying side view partly in cross section of a S. Such eddies having frequencies in the upper sound range are known as Aeolian tones, while in the lower range they are known as eddy tones.

US6075867A – Micromechanical microphone – Google Patents

A microphone is a device that converts mechanical energy waves or sound into electrical energy waves. Speaking into a microphone excites moves a diaphragm that is coupled to a device that creates an electrical current proportional to the sound waves produced. Microphones are a part of everyday life. They are used in telephones, transmitters for commercial radio and television broadcast, amateur radio, baby monitors, tape recorders, motion pictures , and public address systems.

Astatic JT Harmonica Microphone Late s Gray I found a JT web site and apparently the serial # doesn’t help date the mic but the style of label.

I started out with a Shure 55A, still the pride of my collection, and went on from there. I now have over 20 vintage microphones dating from the s to the s or so. There’s so little information available to the vintage mic collector, I’ve found. I have not come across a decent book on the subject, which surprises me because there seem to be quite few collectors around. None of my mics are for sale and I’m not really in the market for more right now, but I’m always interested in learning more about these objects and the history of the companies that made them.

Shure Brothers got started in the early ’30s in Chicago. In Shure introduced the 55 series of Unidyne microphones designed to limit feedback problems with a true cardoid response profile. The 55 series is still in production.

Astatic JT-30 Harmonica Microphone Late 1940s Gray

Like the condenser microphone, this is also a type of pressure microphone, and responds to sound pressure. Shown at left is a section view of a dynamic microphone. These microphones are known for their durability; they are less fragile than condenser microphones, and are able to take in much louder noises before they begin distorting the sound. They are often used by musicians performing live, due to both their ability to handle louder sounds and their physical durability.

Though this microphone type is not in wide-spread use today, it is the most common microphone type in the Steele Collection.

A Micromechanical Microphone is formed with a housing and a transducer therein. The housing has a 6, but under influence of both a sound pressure and a static pressure. Publication number Priority date Publication date Assignee Title.

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community. Please make sure that you’ve entered a valid question. You can edit your question or post anyway. Please enter a question. Astatic microphones are engineered to surpass all stock mic options, providing superior sound quality for CB, Amateur, and Single Side Band communications.

Premium noise canceling sound quality and a rugged design make these microphones an unsurpassed legend in the communications industry. The polyurethane coated steel grille screen and low impedance dynamic element creates sonic clarity.

Technical Details

The present invention concerns a micromechanical microphone with a housing in which a transducer element is placed, and which has a sound inlet on one side of the transducer element and a pressure compensation hole on the other side. Primarily the pressure compensation hole has a high acoustic impedance at audio frequencies, and is placed in a, in other respects, closed rear chamber.

The transducer element normally consists of a membrane which deflects due to the sound pressure, and an arrangement to convert this deflection into an electrical signal. Commonly known microphones of small dimensions, as of the magnitude 3. In the past, many different prototype microphones have been fabricated using micromechanics which is a technology based on advanced silicon integrated circuit manufacturing concepts but used for the fabrication of mechanical components.

condenser boundary microphone with a programmable Astatic Commercial Audio Products hereby warrants that this product will be free of defects in material and Retain proof of purchase to validate the purchase date and return it with.

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Astatic Corporation

Shure introduced the Controlled Reluctance Transducer element in The elements had a unique design that made them immune to temperature and climate conditions. It consisted of a brass disc that was used as the main support for the built in transformer, magnetic assembly, diaphram, armature assembly and cover. It was described by Shure as being a high output microphone with good response, high impedance without the need of a transformer that had its stability assured by unique control of the reluctance of the magnetic system.

Years later they were called Controlled Magnetic Transducers. Shure described them as being pressure operated units using the balanced armature, controlled magnetic principle.

The original crystal element is dated Dec and still kicks butt! Some minor scratches in the brown paint, but the mic looks great. Astatic didn’t scrimp on.

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File:Vintage Astatic Silver Eagle Microphone (14763565067).jpg

Astatic D Microphone Head. Free shipping. Skip to main content. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab. Add to Watchlist.

Dating Astatic Mics. Astatic has no information concerning the serial numbers or the dates of mics, but we can, with a little detective work get some.

Users browsing this forum: boxjoint, Google [Bot] , Jthorusen and 27 guests. Replacement Crystal Mic Elements? Posted: Jan Tue 28, pm. I just got my Grandparent’s old Silvertone wire recorder up and running. After going through all of the grief of recapping a cramped chassis, fabricating a new bracket for a modern phono cartridge, and resurfacing the three rubber idler wheels, I’d like to see all features completely functioning again.

That means getting the microphone to work. The microphone element is a long-dead crystal type by Astatic. Looking over the net, I’ve had a hard time pinning down a suitable replacement. The Kobitone elements are all within the K impedance range. Is that enough? What was the impedance of the old Astatic element? They are all rated at an operating range of v-is that something I should take into consideration for this application? Thanks to all in advance for any help on this.

I have not found much on the net about these.

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