As I recall there are also models of Schober and/or Artisan organs that
also use individual keyed oscillators similar to those used in Conn
tube organs.

It's also my opinion that the tube oscillators that use keyed +75 VDC
produce a more pipe-like sound than some of the others that key the
output of continuously running oscillators through a gated keying
system.  I believe that most of the later Conn solid state organs fall
into this latter category.

While Schober and Artisan organs are rare compared to Conns, they also
can be used if they are the individual keyed oscillator type unit.

Hope this is of some help.

Hal Davis
Leslie, Michigan