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Old 28th October 2004, 06:12 PM   #31
Luke123 is offline Luke123  Canada
diyAudio Member
Join Date: Jan 2004
Location: Quebec
Hello Elso

" Hi Luke, when using a tantalum cap for C1 at the input of the regulator it will likely blow up with some firework. Tantalums do not take a large ripple!"

No. The ripple current IS small because there is already some sort of large cap value after the bridge. Anyway 0.1F is already suggested per the spec sheet. But you're right to state that Tan caps are fragile. Choose one that has at least double or triple the working voltage.
I also forgot to add a 10-100F across R2.

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Old 4th November 2004, 10:10 AM   #32
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Join Date: Jul 2003
Location: Dona paula, Goa
add a 10-100F across R2.
National specifies value upto 10F
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