Hi Gregg,

How about a 7812 with a Si diode in the ground leg ?

That works fantabulous :-)
But regulation goes to about 1% then.

When talking about regulated DC for heaters,
CC makes more sense to me than CV - it is
even more gentle to the heaters :-)

Tom

--
Anyone who considers protocol unimportant has
never dealt with a cat. - R. Heinlein