[Boatanchors] recapping with polyprop caps

[Glen Zook]

Those capacitors are NOT electrolytics!  The black
band indicates "outside foil" which tells which of the
two foils that actually comprise the capacitor is
located nearest the surface.  With the older type
capacitors in some circuits where the outside foil is
connected might have an effect as to the possibility
of "hum" being introduced into the circuit.

On the polypropylene capacitors there is no "outside
foil" and therefore they can be connected in either
direction.

Again, the original capacitors are NOT electrolytics.

Glen, K9STH


--- eugene at hertzmail.com wrote:

I am recapping some of the HV capacitors in a heathkit
SB-610.  The originals were 1000V, 1200V and 1600V and
values such as .25uF, .1uF etc.  It was suggested to
me that these be replaced with metallized
polypropylene film caps to get similar values and
sizes.
 
The originals were electrolytic and the polarity was
clearly marked. These new polyprop caps do not seem to
indicate a polarity.  Is this correct? I am always
concerned about HV caps to make sure they are
installed correctly (if there is an incorrect way to
install them).
 
Are these caps non-polarized? Can these caps be put in
any orientation?









Glen, K9STH

Website:  http://k9sth.com


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