CAST mylar power supply capacitors
development of these capacitors started when Duelund
was asked to make high capacitance value capacitors
for a Tannoy loudspeaker crossover.
Smaller in dimensions but maintaining a large degree
of the performance of the CAST copper foil PIO. ( http://www.positive-feedback.com/Issue70/duelund.htm)
They came up with a design which uses 4 separate metalized
mylar windings and CAST damping to cancel internal vibrations.
was this last statement about damping internal vibrations
that triggered our interest. We believe that internal
damping is very important for power supply capacitors.
This damping makes paper in oil capacitors make such
great power supply capacitors.
The famous Black Gate WKZ capacitors used a special
damping sheet inside their capacitors. Our Unicon power
supply capacitors also have special damping against
internal vibrations and this is probably the reason
why they sound better then comparable capacitors.
our request, Duelund started working at a 630Vdc version,
and now after working and listening to them this last
year, we can safely say: when you are looking for the
best sounding power supply capacitor, you will have
to try these.
their use is not solely restricted to power supply duties.
They also make very good cathode bypass capacitors.