Ecc802S-Srpp-El84-Push-Pull-Tube-Amplifier
Gio writes –

Bruce’s latest project is an EL84 Push-Pull Tube Amplifier. LM317 Regulators are used for constant current sources (CCS) to set the bias of the output stage. It is interesting to see a modern semiconductor combine with vacuum tube technology.

ECC802S SRPP / EL84 (6BQ5) Push-Pull Tube Amplifier – Link.