Here is a complete schematic of the amp. Only one audio channel is shown for clarity but the power supply is designed to power both channels. Click on the drawing to see a full size version.
Major Components:
V1 20EZ7
V2. V3 10BQ5
Q1 2N3904
Q2, Q3 IRF730
U1,U2 TL431
U3 LM7906
T1 Power Transformer Triad VPS20-4000 or equivalent
T2 Output Transformer Triode Electronics TF-110-48-UL