In the late 1930s, Western Electric, drawing on ribbon technology for the ﬁrst and only time, produced the ﬁrst switchable multi-pattern microphone, combining its well-respected 630A omni-directional dynamic unit with a uniquely crimped bi-directional ribbon assembly. Its output impedance, as with all previous Western mics (excepting condensers), was 50 ohms. It offered a selection of R (ribbon/bi-directional), D (dynamic/omni-directional) and C (cardioid or combined pattern). The 639B added another three variations of the combined pattern for a total of six patterns. In the early forties, Electrical Research Products Inc. (ERPI), a division of Western, redesigned the acoustic cage of the 639 for motion picture use, designating it as the RA-1142 transmitter.
From 1953 to 1968, RCA Victor Records operated a notable sound recording studio here, which was famed for its acoustics. Pop vocal, jazz, Latin, folk, and gospel phonograph albums were recorded here by such disparate musical icons as Frank Sinatra, Louis Armstrong, Harry Belafonte, Perry Como, Coleman Hawkins, Lena Horne, Sister Rosetta Tharpe, Stan Getz, Sergio Franchi, and Joe Williams. The hall was noted as a venue for Broadway cast recordings, which included Julie Andrews in The Boy Friend, Mary Martin in Peter Pan, Barbara Cook in Show Boat, Ethel Merman in Annie Get Your Gun, Carol Channing in Hello, Dolly!, and Liza Minnelli in Flora, the Red Menace, as well as those of classical artists such as Artur Rubinstein, Marian Anderson, and Beverly Sills in Giulio Cesare.
This microphone was in use in the 1960s at this famous Recording Studio in Manhattan, New York City.
The mike swivels and is adjustable on its axis. Refurbished but needs inside liner. Sounds Great!.