Re: Hot Primary

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Daniel McCauley by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dhmccauley-at-spacecatlighting-dot-com>


> Hey all,
>    What would be the cause and cure for a primary getting hot?


First you have to think what does heat look like in a circuit?  Basically
its a resistance in the simplest form.
You have some current passing through your wire, and some resistance element
(of course in real life this is a complex impedance)
Current through a resistor produces heat!

Some likely causes:

1.  Wire gauge is too small for the amount of current you are passing
through it.

2.  Operating frequency is low.  Remember your primary is a big inductor.
At low frequencies, the impedance of this coil will get much larger to at DC
it would be a short circuit.

Dan'