electromagnets & xformers

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hodad

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Joined
Jun 4, 2004
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This is an odd thought I'm having, inspired a bit by the tape emulation thread and on old thread dealing with the effects of magnets on xformers.

What if you had an electromagnet to saturate your output transformer, & drve the electromagnet essentially the same way you drive a VU meter, so that the effect would increase as signal level increased.

It sounds like it might possibly be an interesting effect; however, I have no direct experience with the effect of magnets on transformers, & I haven't messed with electromagnets since I was a kid, wrapping wire around nails & picking up iron shavings.

Questions that pop to mind:
Would the effect be significantly different than sticking a magnet on the xformer?
Is the effect of the magnet instantaneous or would there be a lag? Would there be a residual effect after the voltage on the electromagnet was removed?
How much voltage would be required for the elextromagnet to have a noticeable effect on the transformer?

It's a cockamamie & cockeyed idea, I know, but I'm bored & in front of the computer, so I thought I'd toss it up like an intellectual clay pigeon, just to see it get shot to pieces.

Tom
 
I don't see where the effect of an external electromagnet, or for that matter a permanent magnet, would differ much from merely running d.c. through one or more windings of the trafo.

But give it a try!
 

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