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From: larry@kitty.UUCP (Larry Lippman)
Newsgroups: sci.electronics,talk.bizarre
Subject: Re: "Magic Eye" tubes (& other ancient technology)
Message-ID: <1847@kitty.UUCP>
Date: Thu, 16-Jul-87 09:09:07 EDT
Article-I.D.: kitty.1847
Posted: Thu Jul 16 09:09:07 1987
Date-Received: Sat, 18-Jul-87 06:39:55 EDT
References: <1495@frog.UUCP> <35ffa63b.b8ab@apollo.uucp> <6@spar.SPAR.SLB.COM> <584@sol.ARPA>
Organization: Recognition Research Corp., Clarence, NY
Lines: 21
Summary: Use "vibrator" as inverter element...
Xref: mnetor sci.electronics:985 talk.bizarre:2522

In article <584@sol.ARPA>, ken@rochester.arpa (Ken Yap) writes:
> This variety may not have existed in this country but there was another
> kind which varied a fluorescent strip. At maximum grid voltage the two
> strips closed, like a curtain. Same principle.  Good fun. Imagine: I
> wanted to make a bike speedometer with those things years ago. With a
> voltage inverter and all. I was a bit crazy then. No jokes about my
> still being crazy, thanks. :-)

	In keeping the magic eye tube technology, you should have used a
"vibrator" (the _electronic_ kind :-) ) as the inverter element.  Even
better, you should have used a synchronous vibrator which also functioned
as a rectifier - it had auxiliary pole-changing contacts.
	Does anyone remember the pleasant, "state-of-the-art" hum which
emanated from portable equipment which used vibrators?  I seem to recall
that most vibrators operated around 115 Hz.
	Hmmm... Have I just severely dated myself talking about vibrators?

<>  Larry Lippman @ Recognition Research Corp., Clarence, New York
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