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From: ph@ama-1.ama.caltech.edu (Paul Hardy)
Newsgroups: rec.audio.high-end
Subject: Re: Leaving components turned on.
Message-ID: <8634@uwm.edu>
Date: 2 Jan 91 13:39:43 GMT
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Approved: tjk@csd4.csd.uwm.edu
Originator: tjk@csd4.csd.uwm.edu

In article <8587@uwm.edu> hqyy@vax5.cit.cornell.edu writes:


	   On the subject of leaving components turned on as warm improves
   sound quality: inthe case of transistor (or MOSFET) amps or pre-amps
   (such as the mentioned Threshold), this is recommended as the surges from
   turning on and off will tend to damage components and also since the
   parts inside the component will reach and stay at a thermally stable
   environment.  In the case of tube amps or pre-amps, use your judgement:
   if left on, tube life will be considerably shortened and you also risk
   damage from voltage spikes.

With tubes, you can use a Variac to keep them at, say, 25 VAC and turn
this up to 120 VAC for listening.  This gets around the power-on spikes,
and keeps the other components (e.g., caps) warmed up to some degree.

Anyone know of a good commercial source for Variacs?

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"Does Emacs have the Buddha nature?"  --Paul Hardy