[HAM] Vedr. Re: old capacitors

[Ivar Berg]

I've heard trough the grapevine that a Danish company
have started producing paper-caps again. Does anyone
on the list know who they are?


--- Jordan Kersten <jordankersten at hotmail.com> skrev:

> Why would we use NOS Caps?  The point is to replace
> the old wax and paper that drifts with age.  Even a
> wax capacitor that has been sitting on a shelf for
> 20+ years is going to have drift...that would defeat
> the whose purpose of the rebuild.-Jordan-
> 
> > From: thermionic27609 at earthlink.net> Date: Tue, 19
> Feb 2008 09:18:22 -0500> To: hammond at zeni.net>
> Subject: Re: [HAM] old capacitors> > Benjamin,> >
> Maybe I missed something, but did ANYONE on here
> suggest using new > old stock capacitors, i.e., ones
> that have been sitting around for > 30-40 years? If
> so, I missed it. The question was whether to use new
> > production cans or individual capacitors mounted
> some other way.> > To Keith Clark: looking at some
> Sprague Atoms I have, for example, it > seems to me
> that four of them combined are physically larger
> than one > of the old can capacitors with the same
> values. I'm aware that there > are trade-offs using
> miniaturized capacitors, so I try to use larger >
> units when possible. For that matter, the new
> production CE > Distribution capacitors are often
> smaller (shorter) for the same > values than the old
> ones. You do have a point about size and > capacitor
> life, but I think reducing it to multi-cans vs.
> individual > units doesn't answer all the
> questions.> > And as I think everyone agrees, the
> big enemy of electrolytic > capacitors is heat. I've
> seen many old tube amps where the can > capacitors
> were mounted too close to a hot rectifier tube; in
> almost > every case, the capacitor is bad. In this
> case, putting capacitors > somewhere else,
> regardless of how you do it, will greatly increase >
> capacitor life. This is not a huge issue in the
> AO-28, although you > certainly don't want to mount
> capacitors close to any of the > wirewound power
> dropping resistors under the chassis.> > David> > On
> Feb 18, 2008, at 2:20 PM, benjamin wrote:> > >> >
> Hope I have helped a bit in contributing to this
> forum with some > > insight> > into Electrolyts caps
> , so please Use NEW and fresh produced > > quality
> ones ,> > not Old 'gold' that is dried out and
> corroded inside; If you > > want them to> > look
> like Oldies , then open up the old can and put the
> new one > > inside ,> > fill it up with some kind of
> polyester and there you have your ''oldie> >
> looking' good cap !> >> > --> Subscription
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