Printed Circuit Boards
Boards for the CTH are available from Cavalli Audio.
Both amplifier channels, including tube stage, buffers, and rail splitter, ε12, heater supply, HV and LV PS are fitted onto a single board.
The board has a top-side ground plane. The ground plane for the heatsupply (center right) and the ground plane for the amplifier sections are connected by a narrow strip near the star ground pad. This arrangement prevents, as much as possible, the heater switching ground noise from getting into the amp ground plane.
CTH Board with Ground Plane
All jack, pots, and switches (except for the 24VAC connector) are located off board.
Not all components are rendered in this image, but most of them are.