What is d-104 microphone?

The D-104 microphone is a popular desktop microphone that was first produced by the Astatic Corporation in the 1930s. It features a chrome-plated base and a movable arm that allows the user to adjust the microphone position. The D-104 became famous as a ham radio microphone in the 1950s and 1960s, and it is still used by some amateur radio operators and collectors today. The D-104 was also used with some commercial two-way radios and airplanes. Its distinctive design and crystal clear sound have made it an iconic piece of radio equipment.