[Boatanchors] Sprague Black Beauty capacitors

Al Parker anchor at ec.rr.com
Wed Mar 15 13:19:55 EDT 2017

Hi Richard,
	I thought you'd have opened a real discussion here, but haven't seen 
anything yet.  So, here's my thoughts -- I've done a lot of SP-600's, 
and they each have in the neighborhood of 55 BBOD's in them.  I've 
usually used disc ceramics in most places, with electrolytics where 
needed due to value, and poly's for the few interstage coupling 
applications, particularly when RF is involved.

Al, W8UT

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 3/14/2017 3:50 PM, Richard wrote:
> I have seen a lot of rhetoric about how bad the Sprague Black Beauties
> are and they should all be replaced, but nobody indicates a reasonable
> replacement. I have some 0.22 uFd BB's that I am thinking of replacing
> with polypropylene film non-polar caps. Is this a reasonable choice? I
> assume non-polar caps can be used just like polarized caps for DC power
> filters. Does one just pick a positive terminal and go from there? Other
> options are ceramic disk or electrolytic. What is the recommended
> replacement? Please advise.
> Richard
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