[Heathkit] SB-303 project.

[Glen Zook]

I get my replacement parts from Mouser

http://www.mouser.com

and their prices are generally about the best around.

Yes, a 470 mfd capacitor is the "new" value for the
old 500 mfd capacitors.  Remember that most of the old
electrolytic capacitors had a tolerance of -50% / +80%
whereas the new ones generally have a tolerance of
+/-20%.  Therefore, the new ones are going to
generally be much closer in actual value.  Also, the
new capacitors are considerably smaller in physical
size.

Glen, K9STH


--- kiyoinc at attglobal.net wrote:

I think the electrolytics all should be replaced,
every one of them. It's not worth testing them because
the radio is 35+ years old. It's time. Since I have
other SB-303's, where should I get the electrolytics? 

www.mouser.com has better prices but maybe the problem
is how I've specified the value. 500 ufd's are pricey
but 470 ufds are cheap.
 
The search features on both sites are frankly weird.
If I need a 50 V cap, I don't want to specify 50 V
because a higher voltage will work. Ditto capacitance.
If the circuit uses 500 ufd, then 470 is just as good,
especially if it's 1/10 the price.









Glen, K9STH

Website:  http://k9sth.com


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