Yes, the primary is going to use a little more power with a higher voltage
and create a little more heat, but this is minimal compared to that produced
by the load. Fuses will blow if they are sized too small.
Does the working voltage pertain to the insulation value only, and not to
the temperature rating?
Jim Smith, KQ6UV
----- Original Message -----
From: <gdaught6@Stanford.edu>
To: <amps@contesting.com>
Sent: Sunday, October 13, 2002 7:28 PM
Subject: Re: [Amps] Filament transformer needed
> On 13 Oct 2002 at 12:11, Jim Smith wrote:
>
> > Bill,
> > I've got a transformer that produces 6.6 volts with a multi-tap
> > primary. If you feed it with 240V to the proper taps, you should get
> > 12.57 volts. It's rated at 535 working volts.
>
> Not a good idea in general! Fewer volts is fine, but putting 220 on a 110
primary to
> double the output volts is asking for trouble... in the form of high
temperatures, high
> primary currents, and blown fuses.
>
> Even if the primary can be properly wired for 220VAC, the secondary will
still be 6.6
> volts.
>
> 73,
>
>
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