[R-390] Filter cap replacement question

[Tim Shoppa]

> For you guys who are restuffing your R390A's electrolytics,
> which caps are you using?

> another set I've gutted, but these caps are just about 0.010" in
> diameter too large to stuff three of them in the can so I
> was wondering where you are
> getting caps small enough to fit three inside the cans.

For the 33 uF 3-section, I used Nichicon 33uF 400V 105C
rated radials.  Part number UVZ2G330MHD.  I like to be
conservative so I went with a 400V rating, 105 degree C rated,
and Nichicon is a well-respected lytic maker.  (They don't steal
electrolyte formulas with missing ingredients!)

Diameter wise I get two of them in the bottom of the can
and a third up top.  It's a tight fit but it does work.

> [can't put wire through octal socket]

I've seen the plastic/phenolic socket drilled out to do this.

> I have some old burned-out octal tubes and their bases are
> a perfect press fit in the old cans so if I can find small enough
> caps, this should be a cake-walk.

I used the original can base.  Drilled holes into the brass
pin a little bit, inserted a wire, filled with solder.  I needed
extension wires to get to the cap "on top".  JB-welded
the can back together.

Others drill/tap a hole and use a screw to attach to the old base.

If you press-fit a "new" octal base into the old can I don't think
you'll have enough height to do all three caps.

Tim.