[Boatanchors] Headphone Impedance Matching

David C. Hallam dhallam at knology.net
Wed Dec 4 12:33:53 EST 2013


I picked up a Lincoln headset/boom mike set a few days ago.  The box is 
marked Telex but there is a Lincoln sticker and part number on one end 
of the box.  I found this set listed in a 1968 Allied Radio catalog with 
the specs.  The microphone is a high impedance ceramic element and the 
headphones are 2000 ohm impedance.  The high impedance microphone is OK, 
but what would be the best way to match the 2000 ohm to my 75S-3, or do 
I even have to worry about it?  I have some 8 to 600 ohm matching 
transformers, but nothing to match to 2000 ohm.

David
KW4DH

-- 
"I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them."
Thomas Jefferson


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