crap regulators?

[Scott Gravenhorst]

"Or worse" is right.  I was just at National's site and looked at
the spec PDF for LM7815C, (1.0 or more ampere version).  They
spec the output at 14.4 to 15.6 volts.  That's +/- 0.60 volts!

blacet at metro.net wrote:
>If you look at the data sheets, you will note that there is a fair
>amount of tolerance for basic regs; +/- .25V (or worse) is not uncommon.
>This is normally of not much consequence to properly designed synth
>modules where really important voltages are derived from refs or
>adjustable regulators.
>
>One option is to use the LM317 and 337 adjustable type regulators and
>dial in what you want. 
>
>Your -V is not bad, but the +V is lower than normal. A lot of borderline
>spec regulators get dumped on the surplus market.
>-- 
>
>Regards.
>-------------------------
>John Blacet
>Blacet Research Music Electronics
>http://www.blacet.com
>-------------------------
>blacet at metro.net
>-------------------------
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>http://www.blacet.com/mailform2.html
>

-- Scott Gravenhorst
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