Astatic M-350x 'Dynamike'

The Astatic Dynamike models M350 and M352 were successors to the omnidirectional DK-1 crystal microphone and appear to share the same funnel-shaped body. Astatic seemed pleased with their innovation, writing "IT'S NEW ... and TERRIFIC! ... the DYNAMIKE! First Time Ever, A Slim, Modern, Quality Dynamic At These Low Prices!"

The Dynamike models were launched in 1955 and appeared in various radio catalogs between 1956 and 1959, including Radio's Master.

This news item appears in Radio & Television News magazine, August 1956, page 132.

"The Astatic Corp., Conneaut, Ohio is now marketing a versatile, wide-range dynamic microphone which combines modern styling with low price. The "Dynamike" is light, slender, and compact, measuring only 1.75" across the top and weighing only 7.25 ounces. The housing is die cast alloy, with a glare-proof satin black finish and brushed chrome trim. Response of the microphone is 50 to 10,000 cps. It comes equipped with a standard 5/8" -27 thread which is readily adaptable for floor stand, desk stand, or hand use. It is available in either high or low impedance models with or without an "off -on" switch adapter."

From an ad in Electronics Magazine, March 1956

"Never before has such a versatile, high output, attractive dynamic microphone been available in high and low impedances at such a low price! The Dynamike has the response and performance found up to now only in higher priced models. Adaptable for hand, desk and floor stands - ideal for all-around use. Compactly styled, feather-weight (7¼ oz.), satin black glareproof finish with brushed chrome trim. Perfect for announcer and performer. Frequency response - 50 to 10,000 cps. Cable length 18 ft."

From the Astatic M-350 manual

M-350 HIGH IMPEDANCE

• OUTPUT: -56 db (1 volt per microbar).

• FREQUENCY RESPONSE: See curve in graph below.

• POLAR RESPONSE: Omni-directional in plane parallel to diaphragm.

• MAGNETIC CIRCUIT: Alnico V "hi-energy" magnet and Armco "hi-permeability" magnetic iron.

• DIAPHRAGM: Special plastic - resists extreme weather effects.

• HOUSING: Die cast metal; satin black finish; chrome trim.

From Radio Electronics Master Catalog, 1959, page D-159:

MODELS M-350 AND M-352

"The Dynamike." Low Cost Wide Range Dynamic Microphone. Versatile, all around high or low impedance dynamic microphone for PA. tape recording communications, industrial applications

MODEL M-350: High impedance, output level -56 db, response 50 10 000 Hz, complete with adaptor for 5/8" 27 Thread. 18 ft. single conductor shielded cable. Finish non reflecting satin black with brushed chrome rim

MODEL M-350-S. Same as above with switch adaptor.

MODEL M-352 Same as M-350 but low impedance 50 ohms balanced and 18 ft of conductor shielded cable.

MODEL M-352-S. Same as MODEL M-352 but with switch adaptor.

Net weight 16 oz.

List Price-M-350 (high impedance) $41.50

List PrIce-M-350-S (with switch) $46.50

List Price-M-352 (low impedance) $37.50

List Price-M-352-S (with switch) $44.75

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The frequency chart below shows the response of this M350 dynamic microphone (black), compared with the similar looking DK-1 crystal microphone (red).