Simple heater question
 

Is it kosher to lift heaters by hooking the filiment windings CT to a 50v bias tap from another transformer (vs. making a divider from the B+)

Thanks.

No problem at all. The assumption is you will rectify and produce a stable DC reference. You wouldn't want to just tie it to 50V AC. Also assumes the CT of the winding is essentially circuit common.

Thanks. A simple diode, half wave rectifier would be sufficient? So rectified bias tap to Heater winding CT's to PSU ground bus. Correct?

Exactly

Thanks.