Jim wrote:

A week ago I emailed BHC Aerovox, Nichicon and several other
manufacturers, who advertise high quality power capacitors, but they
have not responded. Several others responded saying they don't carry
this cap. value. Where can I go to obtain high quality power caps.?

I need a pair of replacement power capacitors to replace the one's
originally manufactured by Nichicon and marked as follows

CE W
Nichicon 85°C
22,000 uf
80WV
60322

Application: One cap. is used on the power supply +60VDC rail and
another on the -60VDC rail.

Insulation color: black
Dia.=63.5 mm (desired to maintain this value for mtg. reasons)
Height approx. 120 mm (approx. max. ht.)
Spacing betwn screw terms = 28.6 mm

I'd like to upgrade to a higher voltage

Why ?

What reason ?

and temp. e.g. 105°C, if feasible.

If it's not running hot - you don't need 105C.


Increasing cap. value is worth considering if the associated circuitry
can deal with the extended inrush current, etc.

What value of ESR (meas. freq.?) is desirable for these caps used in a
120W (8 ohm) audio power amplifier?

Bulk storage caps used at line frequency aren't often given a specific ESR
rating since it's rarely critical. This is more of an issue for SMPS caps @
100kHz. You might be more interested in ripple current but unless it's a
heavily driven PA amp, just about any modern electrolytic will be just fine.
22000 uF will havea high ripple current rating anyway.

You'll find that although 80V caps are listed in manufacturers' catalogues,
most distributors only normally stock 63V and then 100V.

63V is adequate for your application although you may need to spec a higher
voltage to make it big enough !

You should be looking at which manufacturer meets your dimensions really.
Modern caps have shrunk a lot due to developments in materials.

Screw terminal types are rare these days btw. Most ppl pcb mount.

Check out www.farnell.com


Graham