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Re: [Amps] Buck-Boost Transformer Selection

To: Paul Christensen <>, "" <>
Subject: Re: [Amps] Buck-Boost Transformer Selection
From: Steven Katz <>
Date: Wed, 25 Jun 2014 20:30:43 +0000
List-post: <">>
I had a Quadra for about two years and my line voltage runs about 245V in the 
winter and more like 250-252V in the summer (they crank it up, I guess, perhaps 
to reduce line losses when everyone's using air conditioning) and it never 
hiccupped; so I doubt any of them would.

Certainly worth just trying it, to find out.

-----Original Message-----
From: Amps [] On Behalf Of Paul Christensen
Sent: Wednesday, June 25, 2014 1:23 PM
Subject: Re: [Amps] Buck-Boost Transformer Selection

> 'It's a switchmode power supply with "universal input," and will 
> become more efficient at higher line voltages...'

If that's the case Steve, I would only be concerned if the amp's firmware 
reported a fault due to high line voltage and perhaps causes the amp to 
trip-out.  Because of filament voltage, I'm much more concerned about line 
voltage with my tube amps and really have no concern when using my SPE. 
Line voltage here typically runs 252-255VAC.

Paul, W9AC 

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