Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!silver!commgrp
From: commgrp@silver.bacs.indiana.edu
Newsgroups: sci.electronics
Subject: Re: Transistor Trivia
Message-ID: <7200039@silver>
Date: 27 Oct 89 20:33:00 GMT
References: <14290@well.UUCP>
Organization: Indiana University CSCI, Bloomington
Lines: 20
Nf-ID: #R:well.UUCP:-1429000:silver:7200039:000:676
Nf-From: silver.bacs.indiana.edu!commgrp    Oct 27 15:33:00 1989



I believe Regency of Indianapolis marketed the first transistor radio,
circa 1956.


>... my buddy eventually sat upon (or otherwise mangled) his
>radio and he gave it back to me for salvage.  I still have all of the
>CK-722 transistors!
>--Myron A. Calhoun, PhD EE, W0PBV

I burned out my Raytheon CK-722, so dissected it.  To my surprise, 
there was another smaller blue aluminum case (with red dot on emitter) 
inside the outer one, with a layer of white plastic foam between. Why 
did they do that??  It seemed more like thermal insulation than a heat 
sink, and germanium transistors couldn't stand heat.

--

Frank Reid     W0MKV @ K9IU     reid@gold.bacs.indiana.edu