“Before” picture of an RCA 77-DX ribbon microphone. The case shows a lot of surface corrosion, and the grill cloth is brown and tattered. The RCA label is also missing. For all the cosmetic defects, this mic actually worked fine—just needed a cable.
“After” picture of the same RCA 77-DX. I cleaned off all of the surface corrosion, replaced the grill cloths, installed a new cable, and added a reproduction of the RCA label.
The mic in my profile pic is an #RCA #77-DX; the diamond-shaped plate is the pattern selector. Inside, when you turn the selector, you rotate a metal shutter that variably exposes a slot behind the ribbon, much like on the #Varacoustic. This mic came to me as a cosmetic basket case. Cleaned up well!
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