ZKNU-3

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The General Radio ZKNU-3 Fluted Knob was introduced in Catalog L (1948) and remained available through Catalog O (1956).

The Type ZKNU-3 is a fluted type knob with skirt diameter of 1-5/16". It accepts both 3/8" and 1/4" shafts using a supplied bushing. Its constructed of black phenolic resin and a "spinner" attached. The spinner is usefull when a slow motion dial is encountered. See the photo below of the Type 722-ME.

See the KN article for all members in the series.

Specifications

• Color: black
• Skirt Diameter 1-5/16"
• Overall Depth: 3/4"
• Shaft Size: 3/8" and 1/4" bushing supplied
• Composition: phenolic resin

Links

• Experimenter May 1948 describing the Type KN Series

Photos

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  ZKNU-3 In Use