[Amps] P.S. Filter Capacitors

[EP Swynar]

Good Morning All,

Some many moons ago in a roundtable I had with OT friends W2UJR & KA9QLF, the subject of using AC motor starting / running capacitors --- in place of electrolytic capacitor "strings" --- in high voltage power supplies came up...

Both Dick and Steve stated that such a practice was frugal, effective, and quite common in an earlier time, with the bonus being that the working AC voltage ratings of such capacitors could be increased significantly in DC applications --- upwards of some three-fold, if I recall correctly...

I have the notes of that QSO filed away someplace in my "rubble pile" here, & I continue to look for the reference (it's all the more pressing for me now, as I contemplate the construction of a new HV supply for another project).

What experience --- if any --- have members of this group had in this regard...? And what is the multiplier factor that may be safely applied in such instances...? I have a couple of nice, tall, NOS 33 ufd. / 330 VAC G.E. caps here that I'd love to put to work, & I'm wondering what they might withstand in terms of DC potential.

Thanks in advance, & my vy

~73~ Eddy VE3CUI - VE3XZ

PS: Both W2UJR and KA9QLF have (sadly) joined the ranks of SKs --- but through natural causes, and NOT as a result of any P.S. mis-adventures...!