capacitor replacement

[minimonitor]

Hi aos members,probably a yawn worthy question to ask .i have just built a home kit dac and have been impressed with it .I then got the modification bug and replaced all the caps with silmic II exept caps which remain.My question is the caps i want to replace are an awful value 25v 1500uf as you can imagine the choices of decent caps are limited . Do you guys have any suggestions? can i increase these to say a 25v 2200uf

[Riislingen]

Hi,

Raking up the size 20-30% would normally not entail any difficulties, as long as the voltage and temp is in order. In some cases though, the in rush current at switch on can be slightly hard on the rectifier bridge if the caps are too big.

My guess is that it wont be an issue with this. What types do you need for this particular project ? Snap ins, Axials, Radials ?

Besides the Silmic II´s, which I also like alot, the Panasonic FC´s are great for the price. So are most caps from Cornell Dubillier.

http://dk.mouser.com/Passive-Components/Capacitors/_/N-5g7r?P=1z0zlgfZ1z0zlbmZ1yzvjj0Z1z0zls5Z1z0zldhZ1z0 wrk7Z1z0x1hv&Keyword=1500+uF&FS=True

[istari_knight]

I would say any value up to 4700uf would be fine, voltage rating can be higher but not lower... The hardest part is finding one the same size as the one your replacing.

Some posh stuff here: http://www.hificollective.co.uk/components/capacitors.html

Alternatively I've found Maplins "high temp" capacitors to be good quality: http://www.maplin.co.uk/high-temperature-radial-electrolytic-capacitors-11992

Don't know where you are in Cornwall but there's a Maplins in Truro now ;)

[minimonitor]

thanks guys i think i will keep to the silmic route but now i know what i can use the spectrum has been broadened:)

[UV101]

it depends on where they are in the circuit as to which caps might suit best. Pre reg get as large uF as you can. The bigger the better.

Before regulators I use Panasonic FC where space is an issue and panasonic TSUP where it isnt. If cost is less important look down the Mundorf SI route but you will need to be creative with mounting them (poss on short fly leads). In my personal stuff i use 22000uF Mundorf for analogue rail smoothers and I even use a 47,000uF on the servo in my CDP.

Personally, I dislike silmic and much prefer cerefine. As rule I put solid polymer caps (oscon SEPC) on digital rails and std type electrolytics on analogue. I'd take rubycon ZLH over silmic and cerafine in place of the now impossible to source black gates.

I guarantee silmics everywhere are making the sound mushy and less dynamic compared to what it would be using SEPC and Cerafines.