From: "Ian Field"
Subject: Re: Parallel LEDs calculation
Date: Thu, 19 Sep 2002 01:25:40 +0100
References: <3D7B8B88.4ED5A338@bellatlantic.net> <3D7D580B.7DBE070D@bellatlantic.net> <3D7EB60D.B730482F@bellatlantic.net> <3D7F6383.7F2A132B@bellatlantic.net> <3D85479D.firstname.lastname@example.org> <0c5YhxA1+eh9EwiG@jmwa.demon.co.uk>
NNTP-Posting-Date: 19 Sep 2002 20:09:15 GMT
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"John Woodgate" wrote in message
> I read in sci.electronics.design that Tim Williams
> wrote (in )
> about 'Parallel LEDs calculation', on Mon, 16 Sep 2002:
> >Here's a real stumper: vitreous wirewound resistors. :^)
> >Especially the variable ones.
> >Interestingly, both types appear to still be quite modern, as Mouser
> >sells them.
> Well, quite *current*; the *vitreous-enamel coated* wire wound resistor
> (that's the full name) dates from around 1940, IIRC.
> The cement-coated types are cheaper but larger. The VE ones are a menace
> if run near rating, because they don't look as if they have a surface
> temperature of 250 C or so, but just touch one ....
> Regards, John Woodgate, OOO - Own Opinions Only.
> Interested in professional sound reinforcement and distribution? Then go
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