Really amazing to find that "Here be Dragons" signs light up when some North
Americans are confronted with anything that is different from what they are
used to. Sometimes this is quite crazy, like sticking with feet, inches,
pounds, ounces etc (meanwhile happily building Japanese cars in American
plants, where all the spanners etc must be metric.
Sorry, you really do not need to put in extra filter capacity when you move
from a ripple frequency of 120hz to 100hz, the variation in the tolerance of
the capacitors themselves is probably greater than that.
The use of 220/230v mains vs 110volts (which most of the world thinks
quaint) more than compensates for 60 vs 50hz. (Yes, we know that 220v is
available in most US homes , with a bit of help from an electrician.).
We have been using transformers made for 60hz down here for yonks and
problems are rare.
73
end
Barry Kirkwood PhD ZL1DD
Signal Hill Homestay
66 Cory Road
Palm Beach
Waiheke Island 1240
NEW ZEALAND
www.waiheke.co.nz/signal.htm
----- Original Message -----
From: steven grant <stevengrant98@yahoo.com>
To: <amps@contesting.com>
Sent: Saturday, 07 April, 2001 1:30 AM
Subject: Re: [AMPS] ALPHA 77SX on 50Hz
>
> i think some larger capacitors may also be in order
> 73
> STEVEN GRANT W4IIV :-)
>
>
> --- ARNE GJERNING <gjerning@flash.net> wrote:
> > ALPHA 77SX (2 holer) on 50Hz mains and outboard
> > Peter Dahl XFMR Questions
> >
> > Received a phone call from a country using 50Hz
> > 220-240VAC mains. This person is thinking of adding
> > the outboard Peter Dahl transformer and wanting info
> > about its reliability, power out that can be
> > expected, any mods that need to be made to the amp
> > using this xfmr. (we know this outbaord xfmr just
> > replaces the HV winding of the inboartd xfmr).
> >
> > The other question is the concern of 50Hz vs 60Hz.
> > Any problems here or precautions needed.
> >
> > I will forward any replys received and please only
> > serious comments on the subject. Thanks
> >
>
>
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