Actually, a good question and one that I've never seen a good explanation for.  
A few years ago, I bought a new aviation headset to use with my station and 
guess what?  It had a 1/4 inch plug for either the mic or headphone (don't 
recall which) and a .207 Drake-like plug on the other pair.  Apparently that's 
been standardized over the years so any headset can plug into any aircraft 
radio (at least for private planes).  Whether or not that started before Drake 
began using the smaller plug, I don't know.

73, K8AC
  ----- Original Message ----- 
  From: Richard Bell 
  To: drakelist@zerobeat.net 
  Sent: Sunday, August 17, 2008 4:08 PM
  Subject: [Drakelist] Microphone Jack Trivia


  I don't recall seeing this question asked but why did the Drake Co. choose to 
use a smaller mic jack on the T-4 line?  Surely someone out there knows the 
answer.

   

  Please feel free to direct any comments, including flames, for asking a such 
trivial question, off the reflector.  I've already have used up too much 
bandwidth.

   

  W5BXE



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