220uf - 50v cap ?

[thylantyr]

Other than Black Gate, any other non-polar capacitors
suited for the feedback loop of an amplifier ?

(220uf , 50v)

Might work with 220uf, 25v

I see alot of high voltage films that are massive
in size, physically too big for the printed circuit board.

Anyone make smaller voltage non-electrolytic type ?

 

[EchoWars]

Wow! That would be, like, HUGE for a film cap.

Use a good quality bipolar electrolytic and bypass with a 1 or 1.5µf polypro.

 

[thylantyr]

hehe..

Percy has polypropylene, but
the cost is around $60 each
and it's > 4" x 2"..... heh

The design I have calls for 220uf
and it shows a 0.1uf in parallel with
it......

Gonna layout the pcb to accomodate
the Black Gate or two Panasonic FC
caps in series to get non-polar.
Let the user pick which cap to
install...............

This particular circuit is the feedback
loop of the amplifier, do you think
I should use 1uf poly instead of
0.1uf poly ?

 

[Marlowe]

Hello thylantyr,

Why not Black Gate?

 

[SY]

There's no cap better than no cap at all. Get it out of your feedback loop and use an alternate scheme to get rid of offset.

 

[thylantyr]

There's no cap better than no cap at all. Get it out of your feedback loop and use an alternate scheme to get rid of offset.

Referring this schematic
http://www.diyaudio.com/forums/showthread.php?threadid=14104


C5 is the 220uf capacitor in question.
I'm not sure why they need capacitors
here, prevent DC offset as you suggested ?

 

[thylantyr]

Hello thylantyr,

Why not Black Gate?

I reserved a space on my pcb
layout for the black gate, but
I was seeking alternatives,
not many people want to spend
$50 for a small capacitor that
should only cost a buck. hehe

 

[Peter Daniel]

not many people want to spend
$50 for a small capacitor that
should only cost a buck. hehe

So why don't you get Nichicon ES series from Percy? It will cost you two bucks, but I wouldn't look any further, hehe
Forget the Black Gates.