120nf/2kV ceramics parallel with PSU electrolytics?

[Dingleberry]

Hi.

I got a bunch of these 120nf/2kV ceramic caps for nearly free.

Is there any reason not to use them parallel PSU electrolytics?
Is poly cap a must in that position?

-T

[rp]

Hi.I got a bunch of these 120nf/2kV ceramic caps for nearly free.Is there any reason not to use them parallel PSU electrolytics?
Is poly cap a must in that position?-T

This is a hifi crowd technique and they will always insist on the best part you can afford, I can't see any hifi builder using discs anywhere so that's likely the #1 reason for favoring films. I'm sure films will be more transparent, stable and precise, and the effect is supposed to be subtle so film might maximize the sonic effects for you. Try tacking on the discs and report back, if they sound good to you then upgrade to films. Hopefully others here do this and can explain the advantage in guitar amps.

IME hifi tricks rarely translate well to guitar amps. Remember the lesson of CBS Fender when they tried to add hifi improvements to their amps. People stopped buying them!

[Structo]

A good place for ceramic discs are to parallel rectifier diodes in the power supply to help curtail noise from them.

Across the standby switch is another good place, it can help cure any popping you get there.

As snubbers on tubes to help kill high freq fizz.

But, your caps are a bit big in value for any of those applications.

You can try bypassing filter caps with them.

The thought there, I believe, is it takes care of some transients that can occur in the higher harmonics.

I think what it can do as far as feel or tone goes, is to make the attack feel a bit quicker, faster recovery.