I think guys have been doing this since time began. I have two different
boat anchors out in the barn built exactly as you describe, both built by
other people (one is a bona-fide Henry industrial something-or-other). I
assumed it was "best practice."
73,
Mark - N5OT
----- Original Message -----
From: "Dave Trainor" <dave@n8zfm.com>
To: "Amps" <amps@contesting.com>
Sent: Wednesday, October 30, 2013 2:52 PM
Subject: [Amps] Large Variac controlling HV power supply
Is there any disadvantage (other than size) in utilizing a large 30 amp
variac to supply the line voltage to the HV transformer in a power supply?
I have a 5000V 3A transformer that came from an industrial induction
heater, and the variac from the same to control the voltage. Now both of
these are large, but considering a floor roll around unit for the power
supply and building the variac into the top with its steering wheel
control. Since I have both the cost is small but is there a disadvantage
to doing this power wise? I expect at the current draw for legal limit I
should see no voltage sag at all at 3000v since the cycle dyne induction
heater the transformer came from was a 10kW unit CCS of course.
Thanks,
David Trainor - N8ZFM
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