[Boatanchors] Headphone Impedance Matching

[K5MYJ]

Plug the headphones in and see if they work. You can't hurt anything.

A lot of the old tube radios were designed for HI-Z headphones. They were 
more common at that time.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "David C. Hallam" <dhallam at knology.net>
To: <Boatanchors at mailman.qth.net>
Sent: Wednesday, December 04, 2013 9:33 AM
Subject: [Boatanchors] Headphone Impedance Matching


>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
>
> -- 
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