On Tuesday, March 17, 2020 at 11:06:10 AM UTC-7, wrote:
On Sat, 14 Mar 2020 21:25:20 +0000 (UTC), Cydrome Leader

The alnico
magnets in old and/or inexpensive mag bases were/are magnetized after
assembly. This takes a LOT of current. I have seen the setups for
doing this and they are not trivial.

There's a two-part magnetization process for alnico, you have to observe the
built-in (at ceramic-firing time) polarity when you apply current.
It WILL magnetize one direction, not the other.

Usually, metalworkers have access to high DC current sources from Lincoln, Miller,
Hobart, etc. and that's what it'll take.