Re: Contactor Controller Contacts

[Lee Hart <leeahart@earthlink.net>]

Tom Peterson wrote:
> Does the slot have to be in the end pieces (doughnut shaped
> sheetmetal)? And does the slot have to be the full length of the tube?

Yes. Both of them are a closed loop of conductor, and so act as a
shorted turn.

Slots in the donut pieces are fairly easy to add, and shouldn't
adversely affect mechanical strength. But cutting a slot in the center
tube would allow the wire to crush it (besides being hard to add). So a
suggestion: Pot your coil on its aluminum bobbin in epoxy. When the
epoxy has set, then cut the slot in the donut and inner tube. For that
matter, you could drill out the inner tube and remove the donuts
entirely -- they would no longer be needed to hold the coil together.
-- 
Lee A. Hart                Ring the bells that still can ring
814 8th Ave. N.            Forget your perfect offering
Sartell, MN 56377 USA      There is a crack in everything
leeahart_at_earthlink.net  That's how the light gets in - Leonard Cohen