... Has begun. I've moved away from my original idea of a 5F6A front end grafted onto a Deluxe power section, as my previous thread suggested. The new plan is a JCM800/2204 preamp, EQ and PI, grafted onto some kind solid state rectified 6V6 power section, specs of which are yet to be set in stone. Knowns at this stage: - 2204 front end. - JJ 6V6 power section. - Classictone Deluxe Reverb trafo set: 40-18017 (PT), 40-18087 (OT), 40-18040 (choke). - 16" long chassis. Unknowns at this stage: - everything else! - i'm 90% set on SS rectification, but I haven't shut the door totally on going the GZ34 route. Lots of concepts to master that i'm yet to attempt in an amp build: - zener voltage dropping. - ss rectification of 6V6s. - modifying a 50W SS B+ rail to suit operation @ 20W (filter capacitance changes, optimization for 6V6s, etc). Anyway, i'll update as I make progress. Hopefully the good folks of TPDRI can help me as I plod along. I expect i'll have many, many questions.