A guide to building the Pass F4 amplifier

[thimios]

Can i use 470uf in place of C1,2,3,4?

 

[Dennis Hui]

Don't see why not.

 

[thimios]

I'm confused because shematic is a bit strange.
C101,102 ,C4-104,C3-103 2x220uf but pcb isn't compatible.
That's why i ask if it's ok to use 470uf. plus i have ended up from 220uf when i have plenty of 470uf/50V.

 

[william2001]

Looks like the board can accommodate 5mm or 7.5mm lead spacing for those. For example Elna Silmic 2's would be much physically larger than what you have installed. Just gives the user options. Schematic does look kind of strange there.

 

[Dennis Hui]

Ah...the schematics on page 1 of this thread. I now see the confusion.

When in doubt, I always go back to the schematics in the F4 manual. See page 13 here: https://www.firstwatt.com/wp-content/uploads/2023/08/prod_f4_man.pdf

As you can see, 220uF is the actual part. In my earlier response I thought perhaps you didn't have 220uF but did have 470uF caps.

 

[thimios]

I'm confused because shematic is a bit strange.
C101,102 ,C4-104,C3-103 2x220uf but pcb isn't compatible.
That's why i ask if it's ok to use 470uf. plus i have ended up from 220uf when i have plenty of 470uf/50V.

Thanks Dennis Hui,any official answer?☺️

 

[thimios]

No answer?

 

[william2001]

Those four caps are all coupling / bootstrap, bigger won't hurt anything there. No problem using your 470's, go for it.

 

[thimios]

Good news!