Amps that haven't been turned on for a long time - Variac: recommended if possible or absolutely necessary?

alan67

Well-known member
I seem to recall someone saying this but what period of time are we talking about? I have some amps that haven't been on in several years.
 
I swear one of the Tone Talks, Dave F mentions having vintage amps that sit around for spells and using a variac to bring the amp slowly back up to power.
Re-forming (?) the caps?
I cant remember the term he used off hand...
 
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