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Path: utzoo!watmath!clyde!cbosgd!cbdkc1!desoto!packard!topaz!joseph
From: joseph@topaz.ARPA (Joseph)
Newsgroups: net.audio
Subject: Audio Transformer
Message-ID: <1989@topaz.ARPA>
Date: Tue, 14-May-85 17:37:34 EDT
Article-I.D.: topaz.1989
Posted: Tue May 14 17:37:34 1985
Date-Received: Wed, 15-May-85 02:14:24 EDT
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 16

I am trying to connect the earphone jack of my television set to an unused
auxilliary connector on my NAD 7020 receiver.  When I just build a cable
with a mini phono plug on one end (for TV) and an RCA plug on the other and
connect the units, I get a LOT of hum.  I have been told by an electrical
engineering friend that some kind of matching transformer is required
because of the huge impedance difference between the TV output and the line
level input of most receivers.  Does this sound reasonable?  Both the TV 
and the receiver are plugged into the same outlet to try to avoid
ground loops.  What other problems might be causing this (the
TV and the Receiver are in perfect working order)?  When looking
for a transformer, what should I ask for?  Do companies make products that
do this?  Can I for example buy a box to connect the ouput from my FM tuner
walkman to an integrated amp?

				Thanks for your help
				   Seymour