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Path: utzoo!watmath!watnot!watcgl!dmmartindale
From: dmmartindale@watcgl.UUCP (Dave Martindale)
Newsgroups: net.aviation
Subject: Re: How to Build a Cheap Headset (not long)
Message-ID: <2427@watcgl.UUCP>
Date: Sun, 1-Sep-85 05:05:02 EDT
Article-I.D.: watcgl.2427
Posted: Sun Sep  1 05:05:02 1985
Date-Received: Sun, 1-Sep-85 13:14:50 EDT
References: <159@ssc-vax.UUCP>
Reply-To: dmmartindale@watcgl.UUCP (Dave Martindale)
Organization: U of Waterloo, Ontario
Lines: 8

Not all stereo headphones are 8 ohm.  A goodly number (AKG and Sennheiser
immediately come to mind) are either around 600 ohms or above 1K ohms.
For these, no matching transformer is necessary, just a mono-to-stereo
adapter cable.  However, I don't think you'll find any stereo headphone
with the noise attenuation of the real aircraft headsets.

By the way, the most common aircraft headsets (David Clark and Telex)
are 150 ohms - two 300-ohm transducers in parallel.