mecograph wrote:
Dear Friends,

This is my first post so please forgive me if I break any rules.

I have just picked up a Globe Chief 90 (not 90a) and would like to
begin restoring it. The first thing that came to mind was replacing
the filter capacitor which is 12mfd at 700v. I poked around and
cannot
seem to find any electrolytics in that voltage range that are not the
size of a beer can.

Can any of you recommend a method of substituting multiple capacitors
to make up this electrolytic? Is there a source of these that I've
overlooked? I haven't checked it yet to see if it was bad but I'd
just
feel better proceeding with this project with a fresh filter
capacitor
so I don't destroy the power transformer.
Thanks for any help you can give me,

73,


Derek
WB=D8TUA
Derek, The capacitors that you mentioned are indeed hard to find..
Good news is,, newer capacitors are a lot smaller and more reliable..
Take two 30MF. 450 volts caps and series them ,total will be 15 Mf at
900 V .. I would place a 80 or 100 Kohm resistor at 5 watts across each
cap. to equalize the voltage across each..By the way You can use 40 or
50 MF caps ,this will give you more filtering,better filtering ,which
is a plus..GL 73 W4PQW