The RCA Type KN-1B
pressure microphone

RCA Type KN-1B

RCA Type KN-1B

RCA Type KN-1B

The single-wire transducer. (Read about it in the Description below.)

RCA KN-1A, KN-1B technical specifications

KS-5A base

MI-12066

Photographs courtesy of Jeff Rudisill and Joanna Webb.

RCA Type KN-1

RCA Type KN-1

RCA Type KN-1

RCA Type KN-1

RCA Type KN-1

High rez

Download this high-resolution data sheet.
This is a re-creation sans photograph.

Data sheet

Download this RCA data sheet
courtesy of Ken and Jim Webb.