View Full Version : 360V 1200uF electrolytic cap help.


sean newman
11-06-06, 08:07 AM
To anyone in the know,

I'm having trouble locating one of these for a friends amp. If any of you have any idea where I can lay my hands on one it would be much appreciated.

Ta, Sean.

quickie
11-06-06, 08:46 AM
1000uf @ 385 v or 2200uf @ 350v is all I could find.

Paul.

sean newman
11-06-06, 09:46 AM
me too, all there or there abouts but none the correct value.

quickie
11-06-06, 10:10 AM
If theres room then two of these paralleled would give you 1360uf and the voltage is 385 so ok.

http://cgi.ebay.co.uk/Capacitor-Electrolytic-680mfd-385v-new-and-boxed_W0QQitemZ7625696280QQcategoryZ4662QQssPageNa meZWDVWQQrdZ1QQcmdZViewItem

Paul

martin clark
11-06-06, 11:02 AM
I would worry about the working voltage rating far more than capacitance since electrolytics are notoriously wide tolerance. A tolerance -20, +50% would be quite normal for electrlytics such as this, meaning that anything of 1000uF or above will be more than enough. I'd hold out for a 400V rating at least.

This is obviously a PSU part, and will be storing a huge amount of energy in use; 1500uF at 400v = 100J, so take great care please :) Also note - dialectric absorption means the old caps may well recover enough voltage to 'bite' after they've been 'drained and disconnected; I'd be tempted to leave them with a 100k bleeder resistor across them until disposed of.

sean newman
16-06-06, 03:54 AM
Many thanks for all the help. Managed to locate a 400V 1200uF cap from RS and will be fitting it next week.

Sean.

Fretless Eric
16-06-06, 05:02 AM
Sound advice Martin. Thanks for the reminder!!