I have read all the responses and feel the safest course is to purchase a
Buck-Boost XFMR (new ones are available for ~ $50 or less).
The consequences of a Power Supply failure are quite expensive to
rectify (and yes, I know of the Server Supply Mod).
Better safe than sorry.
Thanks for all the replies,
73, Dick, W1KSZ
On Wed, Jun 25, 2014 at 2:31 PM, <w5ov@w5ov.com> wrote:
> The current revision of the Quadra Power supply manual says:
>
> AC 200 to 240v.
>
> Anything approved by UL is subjected to testing at +/- 10% of nominal line
> voltage (for 240, that calculates to 216v to 264v), and the device should
> be able to operate over that range.
>
> Some examples: amplifiers like the Acom 2000A are rated exactly this way
> (Nominal +/- 10%) or greater. The Acom 1000 is rated at +10%/-15% of
> nominal line voltage. The new Acom 600S solid state amplifier is rated at
> 170v-265v.
>
> Bob W5OV
>
> On Wed, June 25, 2014 3:00 pm, Joe Subich, W4TV wrote:
> >
>
> > The issue is that the Quadra was designed for the Japanese market in
> > an era where the common input power level was 100/200 V and typical
> maximum
> > voltages were 220V. As such a 240 V maximum input voltage is entirely
> > acceptable ... particularly considering that the 240 V spec even covers
> > 110/220V that was common in North America at the time.
> >
> >
> > The VP-1000 (Power Supply) manual specifies 14A at 200/220/234V input.
> > I would be looking for a 250 to 220 V boost/buck transformer rated for
> > 15A to be safe. Solid state amplifiers of this generation tend to
> > have somewhat lower efficiencies than modern tube amplifiers - around 40
> to
> > 50%. At 1000W output the amplifier is specified for 48 A at 48V
> > (2300 W) input - consistent with the rated 14A input.
> >
> >
> > 73,
> >
> >
> > ... Joe, W4TV
> >
> >
> >
> > On 2014-06-25 3:25 PM, Bill Turner wrote:
> >
> >> ORIGINAL MESSAGE: (may be snipped)
> >>
> >>
> >> On 6/25/2014 12:18 PM, Adrian Flynn wrote:
> >>
> >>> If you monitor the line voltage closely you will find that the "Power
> >>> Companies" are slowly raising the *Normal Line Voltage* to /*125
> >>> volts per leg and 250 volts* *for both legs!*/
> >>
> >> REPLY:
> >>
> >>
> >> Nevertheless, I would ask the power company to fix it. If they refuse,
> >> then go from there.
> >>
> >> 73, Bill W6WRT
> >> dezrat@outlook.com _______________________________________________
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> >>
> >>
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>
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