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Letter: What’s That Mysterious Humming Sound?

The source of your mic problem may not be what you expected, says Bill Ruck

In this letter to the editor, the author comments on Radio World’s recent feature “A Radio Engineer’s Best Friend,” where we highlighted the furry friends of our readers and fellow engineers. 


I don’t have a picture, but … a very long time ago at KJAZ I kept getting complaints about “hum in the microphone.”

So I’d go in late at night and double check everything and could not find the hum. The air staff thought I was just blowing them off.

One day I dropped by in the afternoon and the DJ said “I’m hearing the hum again.” This time I could hear it, too. It was coming from the station cat, “Jive.”  The console was a Gates Stereo Yard, full of tubes, and nice and warm on the top. Jive liked the warmth and was laying on the console directly behind the microphone — an RCA 77DX. Jive was happy and purring.

The air staff learned to chase Jive off of the console before a break.

— Bill Ruck, San Francisco

Bill offers a little backstory: “In the early 70s I was on active duty in the Navy stationed at NAS Alameda. KJAZ was in Alameda too, so it was easy to drop by the studios. KJAZ was a jazz station at that time and ‘Jive’ was a very appropriate name for a jazz station’s cat.”

[Check Out More Letters at Radio World’s Reader’s Forum Section]

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