Re: Why not 120 VDC ? Why invert?

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Article #2087

#2087

From: David George
Date: Wed, 27 Jan 1993 10:27

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In article <1993Jan25.234831.23494@kestrel.edu>, king@reasoning.com (Dick King) writes:

|> I have seen two common ratings for 6V halogen bulbs that fit my particular
|> [Union] lamp: 2.4 W and 4 W.
|> 
|> The 2.4 W lamps that one buys in a bike shop have little sine waves scratched
|> into their bases,  On my 6V battery, 2.4W bulbs with tiny sine waves
|> scratched into their bases burn out after only a few hours.

Maybe it means they are rated at 6v a.c., which is about 4.2v d.c.  In this
case the bulb will be subjected to about 50% overcurrent.

David.

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Message-ID: <1993Jan27.102747.20972@osf.org>

Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!paperboy.osf.org!david

References: <1993Jan23.000753.14523@michael.apple.com> <1jr751INN16a@gap.caltech.edu> <1993Jan25.234831.23494@kestrel.edu>

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Newsgroups: sci.energy,rec.bicycles.tech
Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!paperboy.osf.org!david
From: david@postman.gr.osf.org (David George)
Subject: Re: Why not 120 VDC ?  Why invert?
Message-ID: <1993Jan27.102747.20972@osf.org>
Sender: news@osf.org (USENET News System)
Organization: OSF RI Grenoble
References: <1993Jan23.000753.14523@michael.apple.com> <1jr751INN16a@gap.caltech.edu> <1993Jan25.234831.23494@kestrel.edu>
Date: Wed, 27 Jan 1993 10:27:47 GMT
Lines: 13

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