Preamp only build

[joesatch]

2204 circuit. Where between the cathode follower and the PI would i tap to the output jack of my preamp build?  Wire the MV wiper to the output jack directly?

[T Wilcox]

Right off the master to the output jack!
http://www.ceriatone.com/ceriatone/wp-content/uploads/2016/09/JCM800_2204Ceriatone.jpg
treat your preamp output the same as the FX loop send in above layout

If you wanted to make it switchable to instrument level you can add a voltage divider and toggle as well

I attached a snorkler layout that has both line level and instrument out jacks for reference in this case the designer used 2 jacks rather than toggle like I suggested above

[joesatch]

Outstanding my man!