My views after two minutes and not really thinking it through...
From experience: I've changed one (tantal, in a Variophon, anno 1982)
From laziness: Why change?
From electronics specs: Who wants to service my +50 machines? Drifting
shit makes analogues more juicy... ;)
From a practical view: Yes, PSU ones might be an idea, so that them
failing isn't destroying things on the boards. At least have a look
while there digging... But on the boards, why bother? Broken ones are
easy to locate if that happens.
A channel on my 1986 (?) mixer recently failed. Cap? Probably not, but
if it proves to be I'll probably dig into the rest too. That thing
really needs to work in my setup.
Regarding service my experience says that it's a failed IC in 90% of the
service cases. The most unusual fault was a burnt resistor (!) in a
SDS-IV (pet her for me Patrice!).
--
electronically yours, jesper
- -- --- ---- ----- ---- --- -- -
www.electronic-obsession.se
Jacquot.Patrice@... skrev 2013-05-21 19:30:
> About the caps, I'm facing 2 schools tech :
> the one who is thinking logically than it's better to have new & full
> spec caps so they can provide their real electronic function... So it
> hsould end in a balanced result better than having random behaviours...
>
> & the other one who says "NO", we change them if we have to & only if we
> have to...
>
> But the fact is that 30 years after ... they are in theory ath the end
> of their Time.
>
> Actually they are not necessary dead...
> I also wonder if following the period of productions & marks, they are
> not all the same quality...
>
> Were the ones used by Simmons some high quality ones ?
> or cheaper to keep the cost production lower as possible... ??
>
> We all know that, if the design & concept was top notch, Simmons was not
> top quality handcrafting, or mecanical engineering...
>
> SO all your experiences guys about caps are really important to know !!
>
> I have a vintage mixer with master fully recapped ... We have the
> tendancy to think that it's closer to original product like this than
> with some old drifting caps & components.
>
> I'm not preaching for any of these 2 conceptions, both can be logical...
> but I feel we all need to know about both & to experience about it !
>
> Bless you :)
> Patrice.
>
>
> ----- Mail d'origine -----
> De: Nick Zampiello <newallianceeast@...
> <mailto:newallianceeast%40yahoo.com>>
> À: Simmons Drums <Simmons_Drums@yahoogroups.com
> <mailto:Simmons_Drums%40yahoogroups.com>>
> Envoyé: Mon, 20 May 2013 23:16:38 +0200 (CEST)
> Objet: Re: [Simmons Drums] Re: SDS 9 elementary problem & deeper fault
>
> right!
>
> there's definitely times when you might not...
>
> i thought this about my SDSV until i just did all of the caps not on the
> cards.
>
> power supply and some on the back card seating board.
>
> it was so much better sounding.
>
> z
>
> NEW ALLIANCE EAST!!!!
>
> --------------------------------------
>
> New Alliance East - Mastering
>
> New Alliance East - Facebook
>
> X :::: B :::: S
>
> ________________________________
>
> From: jesper <jesper@...
> <mailto:jesper%40electronic-obsession.se>>
>
> To: Simmons_Drums@yahoogroups.com <mailto:Simmons_Drums%40yahoogroups.com>
>
> Sent: Monday, May 20, 2013 4:30 PM
>
> Subject: Re: [Simmons Drums] Re: SDS 9 elementary problem & deeper fault
>
> Tell that to my 1950's Clavioline with original caps. ;)
>
> The cap debate will go on, but no, I only replace those in need of
>
> replacing.
>
> --
>
> electronically yours, jesper
>
> - -- --- ---- ----- ---- --- -- -
>
> www.electronic-obsession.se
>
> Nick Zampiello skrev 2013-05-20 20:37:
>
> > the capacitors are most likely to decay over time.
>
> >
>
> > all of them suffer after 20-30 years in the field.
>
> >
>
> > usually the power supply is first thing you fix, after which a unit will
>
> > actually start working, but it's not until you update all the caps that
>
> > it starts to sound as good or better than factory.
>
> >
>
> > z