370 AC capacitors
 

Found some 370 volt AC (look like motor starting caps.) in several
sizes at fairly reasonable price, locally.

They would be non-electrolytic and non-polarized. In several values
between 10 and 45 mfd.

May have asked this question before; if so have forgotten the answer!
So forgive me.

But would these caps be OK as filters in the B+ of a conventional DC
power supply. Sixty hertz at 115/230 volt input. (120 hz. ripple).

Ten mfd. sound well within the range for the max. size of a filter on
the cathode output of a typical 5 volt rectifier for example A 45
would be OK after a choke input, in the second or third stage of
filtering.

Am I missing something. These are a physically slightly bigger than
'old' style electrolytics as I remember them. Probably at least two or
three times the volume of modern ones. But cap size especially in home
construction not huge issue?

Comments or contradictions welcomed. TIA Terry

370 AC capacitors
 

terry wrote:
Found some 370 volt AC (look like motor starting caps.) in several
sizes at fairly reasonable price, locally.

They would be non-electrolytic and non-polarized. In several values
between 10 and 45 mfd.

The Dumb Question is What is the PCB (PolyChlorinated Biphenol)
status of these Capacitors ???
Is this why they are being dumped ???

Yukio Yano

370 AC capacitors
 

The Dumb Question is What is the PCB (PolyChlorinated Biphenol)
status of these Capacitors ???
Is this why they are being dumped ???

Yukio Yano

Are you planning on eating them?

denny

370 AC capacitors
 

Hi Terry,

These are motor run caps and are prized by the HiFi community as filter
caps. 370VAC would be good for at least a 600V DC supply. I don't think
you'll have a problems.

Cheers,
__
Gregg

370 AC capacitors
 

On Oct 5, 3:57 am, geek wrote:
Hi Terry,

These are motor run caps and are prized by the HiFi community as filter
caps. 370VAC would be good for at least a 600V DC supply. I don't think
you'll have a problems.

Cheers,
__
Gregg

Thanks Gregg: I will check also if/whether they mention PCB as
content. They appear brand new and are in an industrial surplus
section. They don't look that old. So don't expect them to contain
PCBs any more than fluorescent ballasts less than 30 years old.
terry