Power Supply capacitor physical size

Dave Wade dave.g4ugm at gmail.com
Sat Sep 3 09:56:39 CDT 2016

> -----Original Message-----
> From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Adrian
> Graham
> Sent: 03 September 2016 14:03
> To: Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org>
> Subject: Power Supply capacitor physical size
> Hi folks,
> Looking at the PSU of my Lisa's ProFile after it died gracefully not so
long back
> and it obviously needs new caps since one of the 1000uF 16V ones has
> bulged badly. While I'm replacing that one I'll do the 47uF 250V ones too.
> And the mains filters but I've got a stock of spares for them already.
> Apologies for what's probably a dumb question, but when it comes to cap
> replacement I know I can go up a notch if the required capacitance or
> isn't available so 25V and 400V is ok, but what about physical size?
> I can get the correct capacitance/voltage but they're physically much
> than the ones I'm replacing, like 10mm instead of 16mm diameter. If I go
> to 25V I can get 16mm diameter which is the size of the old ones.

Modern caps are physically smaller so folks who want to preserve the look of
objects resort to Capacitor Stuffing..
.. put a new modern cap inside the old case... 

> Am I worrying for nothing?

Personally I think that it's a valid question. 

> Cheers, from a room not filled with RIFA smoke for once :)
> --
> Adrian/Witchy
> Binary Dinosaurs creator/curator
> Www.binarydinosaurs.co.uk - the UK's biggest private home computer
> collection?


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