RE: Current in the Coil -

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

Original poster: "David Thomson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <dave-at-volantis-dot-org>

Hi Greg,

>Both the primary and secondary coils on Electrum are air-cooled, as neither
develops any appreciable RMS heating.  The peak base current in the
secondary is about 60A , and at the full break rate this results in about
10A RMS, which is acceptable for the 12ga secondary wire.

Thanks, that pretty much sums it up then.  If the Electrum coil does not
over heat at 60A peak in the secondary, it is very unlikely that a much
smaller home brew solenoid coil will over heat.  Thus there is no known
danger of oil heating in a jacketed coil and causing a fire.

This agrees with my experience with jacketed coils.

Have you experimented with oil jacketed coils?  It seems like your work my
benefit from the extra insulation around the secondary.

Dave