Eiron wrote:



Upgrade? That's a bit of an exaggeration.
And it's simply not true that 25 year old electrolytics will need replacing.
They might, but if they measure OK, they are OK.


** Quad 405 & 405-2 amps used PCB electros that were faulty.

Despite being fully sealed and sold as long life by the makers "Roedestein" they all failed early with ERS values going off scale and microfarads disappearing. See the dark red caps on this PCB.

http://upload.review33.com/images/20...1147094159.jpg

Same thing happened with the pair in the output crow-bar circuit - which could prove a tad disasterous !!


..... Phil