Great piece of history, Bi-directional velocity Ribbon Microphone production started in 1932 till 1955.
WORKING!!! Professional Studio Ribbon Microphone!
Sound of exactly this mic below
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Considered by many as the most natural-sounding microphone ever made, ribbon mics were immediately embraced by the broadcast and recording industries. Not requiring any awkward power supply or batteries in their operation, the first commercially produced ribbon microphones appeared in the early 1930s.
The ribbon microphone was also known as the velocity microphone and was the last of the four basic microphone types developed, following the dynamic, condenser, and carbon microphones.
The ribbon’s natural sound can also be made to sound warm, big, and syrupy (Bing Crosby-like) when placed within two or three feet of the talent (generally, you can’t close-talk a ribbon without having a greatly exaggerated bass characteristic). An adequate breath filter in front of the ribbon is also necessary to protect the delicate ribbon (NEVER blow into a ribbon mic).
The output level of the ribbon is nearly always lower than that of a dynamic microphone. For this reason, hum rejection and shielding are important considerations in ribbon microphone construction.
The first of the 44 family was the 44A, a large microphone, although considerably smaller than the 77A. It used a large horseshoe magnet around the ribbon and featured a figure-8 pickup pattern.
The slightly larger 44B was introduced in about 1938. It also had a figure-8 pickup pattern. Both the 44B and the BX were bi-directional having figure-8 patterns. Its frequency response extended from 30 cycles to 15,000 cycles.
Within its case, the 44 was provided with “V” (voice) or “M” (music) jumper positions. When a lead was connected to the terminal marked “V,” a choke was connected in parallel with part of the transformer winding, which substantially attenuated the low frequency response.
The basic difference between the suffixes within the 44 family were:
The 44A generally had a bronze finish.
In contrast with the 44B and 44BX models, the later 44BX had the ribbon mounted farther toward the rear, giving it a smaller figure-8 on the back side.
The 44B was finished in a distinctive black with chrome ribbing on the lower portion, while the 44BX was an umber grey and stainless steel (Japan Black was optional). Both had the red “meatball” logo in the front center of the lower portion between two bands of ribbing that wrapped around the microphone.
The 44 BX was manufactured up to around 1955.