Re: Ripple filter

John Doe wrote: 
"John Fields" <jfields@xxxxxxxxxxxxxxxxxxxxx> wrote in message
news:3kqfs1pvm205424lkc8osb1a1o9bbr8baf@xxxxxxxxxx
##snip ##

After all is said and done, I'd put a 2000µF/25V aluminum
electrolytic in there and be done with it.

--
John Fields
Professional Circuit Designer



THANKS for all replies!
John I agree that that would be the easiest thing to try so will look for a
large electrolytic capacitor and let you all know how it works. Thanks for
doing the math- I was way off with my .1mfd. If that don't work will look
look into the regulators mentioned. 

Just use John's design, as he designed it. If you use a filter cap
and nothing else, the fan will still be exposed to too much voltage.

Ed




Do they still make germanium 
transistors (low voltage drop)?  I looked for them once -not too hard- and
all I could find was antiques.

I wasn't too clear on the ripple source.  The charger for the RV -called a
converter- has 2 outputs, one for battery, the other powers the fuse bus for
the RV accessories.  I think they do this so charge rate won't be affected
by accessory load.  So I guess the battery might filter it's output but the
fuse bus is not- wish I had a scope.


.

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