Can I use 27uF/500V instead of 22uF/500V caps on a Hot Rod?

[spunko]

Hello, basically what the tittle says.

Would it hurt to change the three original 22uf to 27uf/500 on a Hot Rod (or any similar amp)?

I have F&T kits for the amp, but a friend just arrived from USA and gave me a bunch of 500v nichicons (47uf and 27uf) he bought from mouser.
I'm just curious if this, or any amp will work well with those values?

Thank you very much.

[tonepumpamps]

They'll work fine.  In the grand scheme of things 22uF to 27uF isn't much of a difference.

[spunko]

Wow, I just found out F&T was bought by Mersen in 2021. I have been buying F&Ts just fine until now. I find mostly F&T/Mersen caps on some web pages.
I suppose they are the same quality but with new name.

[tubeswell]

...change the three original 22uf to 27uf/500 on a Hot Rod (or any similar amp)? ...

A couple of points:

1) the actual capacitance of electrolytic caps is variable between caps of the same uF rating and across frequencies. For filter caps, a 22uF rated cap might measure 20uF or 25uF for the corner frequency that we're concerned about shunting out of the PS rail.

2) 'R' and 'C' are variables in a frequency equation, and you need to change either variable quite a lot in order to make a substantial difference in an expected frequency roll-off point for the R/C filter.

e.g. for f = 1/[2Pi.C.R] where you have a 22uF cap following 4k7 power supply resistor (where 1uF = 1millionth of a Farad):

f = 1/[(44/7) x 0.0000022F x 4,700R] = 15.4Hz


But if you replace the cap with 27uF in the same filter:

f = 1/[(44/7) x 0.0000027F x 4,700R] = 12.5Hz


Either way you won't notice diddly squat in the LF roll-off point in your guitar amp (Bottom E on a Bass guitar in standard tuning is ~41Hz - guitar ~82Hz)

[Latole]

You have good answers
 Yes
You won't hear any sound difference.

I often do this.

[spunko]

Thank you very much for taking the time to explain.
Thanks the answers, I learn a lot in this forum =)