[GregS[_3_]]

In article , Rick T wrote:
Greetings All

I have a pt1100 amp with an impedance of 8 ohms rated at about (1000
watts output power) and a toroidal electromagnet with the resistance
of about 1 ohm. I'm doing an experiment with AC signals, audio and
toroidal coils. I'm trying to see how much I can increase the
magnetism inside the toroidal coil basically a donut electromagnet
using AC signals.

The steps I use:
I play a signal out my computer than it's amplified by the pt1100 amp
which is connected to the wire wound around a donut shape. Like this
http://www.codecogs.com/users/13108/img_em5.jpg

The problem I'm having is after I play the signal with about an 1 amp
running through the wire the internal circuit breaker in the pt1100
amp gets tripped. Is there a way I can get all the amps to flow
through the wire without tripping the internal circuit breaker of the
pt1100 amp?

Please not that the goal is to get as much current to flow though the
wires of the toroidal coil as possible to create an electromagnet
without tripping the internal circuit breaker of the amp. At the
moment I can't increase the windings. I tried putting a ceramic
100ohm 10 watt resistor in series with the coil to see if that would
help but the change was barley noticeable .

I also tried making a glass water resistor but it looks like most of
the current was dropped in the water doing electrolysis.

And also I can't use DC at this point.

PS: I'm using 18 gauge wire.

Tia sal22


You need to use a variac.