[Elecraft] Knowles HC-3 Mic Element Replacement For Heil HC-5

[JR]

Hi Fred -- It depends on what time you are talking about.   Some sources 
document Carson using an RCA Type 77 DX ribbon mic in the NY shows.   
Later, Johnny Carson used a Shure Model 33 desk mounted ribbon 
microphone - Carson switched from a RCA ribbon mic to this Shure style 
in the late 1960's.  The Shure was presented by the manufacturer and was 
inscribed with something like “Johnny’s Mic… Not Ed’s… Not Fred’s.”  
Heritage Galleries & Auctioneers (www.heritagegalleries.com) of Dallas, 
Texas, sold Johnny Carson’s Shure SM33 Ribbon Microphone at auction in 
2005 for $50,787.50.

Just saying.     K8JHR