From: "Gerry" 
Subject: RE: [drakelist] R4B hum

old stock
to match it.  Even if NOS caps





were available it's =
likely
they'd also fail shortly.  I've "rolled my =
own"





in a Heathkit and starting =
on an
AC-3 by cutting the base off with a





hobby razor saw and =
installing
discretes.  It's pretty easy except 





for this one.  It's a
physically small can with 200/100/100/20 uf {at}





200v.  With discrete
electolytics coming in 160v and 250v it would





be much safer to go with =
the
250v.  But there is no way they will
fit.





2 100/160v in parallel and =
a
22uf/250v fit a similar can perfectly





side by side with room for =
2 more
100/160v on a second deck.





But with B+ at 160v =
using 160v
electolytics is a
little uncomfortable





even though I'd like =
to think
they were underrated.  





 





Tried to fit 100uf/250v in =
just the
electrolytic paper covers alone





and they work out to be =
about
1/8" too short though they fit





side by side fine, but no =
shielding.





 





Next attempt will be to try =
using a
section of 1-1/2" I.D. aluminum 





tubing that should slip =
right on the
old base.  To make it
"pretty"

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