if transformer?

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Article #18068

#18068

From: Seth Benjamin Rothenberg
Date: Sun, 20 Sep 1987 01:25

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I am trying to build a circuit I found in an old Lafayette Electronics
Book (from before it became Lafayette Department Stores), but
I am not sure it is legal now.  It uses 'i-f transformers' to transmit
an audio signal over an AC line at 400KHz.  The Radio Shack
salesman near me said that the FCC now allows only 46-49Mega Hz
for this type of stuff.  Is this true?  Does anyone know where I
can get so-called if transformers?  If the above-mentioned
circuit is not legal, is there a circuit around that is?

Thanks

Seth Rothenberg
sr16@andrew.cmu.edu
rochester!pt!andrew.cmu.edu!sr16
sbrst@cisunx
sbrst@pittvms.bitnet

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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!husc6!rutgers!rochester!PT!andrew.cmu.edu!sr16+
From: sr16+@andrew.cmu.edu (Seth Benjamin Rothenberg)
Newsgroups: sci.electronics
Subject: if transformer?
Message-ID: <IVImuXy00Uo5Q7c0jH@andrew.cmu.edu>
Date: Sat, 19-Sep-87 21:25:55 EDT
Article-I.D.: andrew.IVImuXy00Uo5Q7c0jH
Posted: Sat Sep 19 21:25:55 1987
Date-Received: Thu, 24-Sep-87 04:46:19 EDT
Organization: Carnegie Mellon University
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In-Reply-To: <3304@eagle.ukc.ac.uk>