The old fashioned aluminum 'lytics are still available, in 105 deg C
rating, in much smaller packages than they used to be. If you use the
solder/snap-in type you can get bargains, like the
CDE 381LX471M450A052.
470 uF @ 450 VDC, size is 35 x 50 mm, $8.58 each in small quantities,
less than $8 for 10 or more.
Mouser and Newark both carry this and take credit cards.
Newark Electronics also has this:
United Chem Com has similar to the Sprague 36D series now, 560 uF
@450 VDC with screws, $13.79 each or <$12 for 10 or more
Mouser doesn't have 105 deg rated with screws but does offer the 85
deg C rated caps that way.
Doing a HVPS with 'lytics is still a budget way to come up with a lot
of stored energy, compared to paper/oil capacitors. The long term
life isn't as good, however, as you kow.
73
John
K5PRO
At 12:00 PM -0400 4/30/06, W0UN wrote:
>What I am looking for is something like 470 uF at 450 volts at
>105 deg C, rated for use in filtering (low ESR). Has anyone
>already done the research to find the best value out there?
>Either for new or surplus caps?
>
>Actual capacitance is not critical, if they are 220 uF caps, for
>instance, I will just parallel two strings.
>
>How about equalizing resistors, say 3 Watt ones. Any bargains
>out there?
>
>Thanks -- John W0UN
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