Stromberg-Carlson ASR-333 integrated amp, mid-way through rehab. This is a cathode-biased EL84 stereo hi-fi amp from the early 60s. It needed a grounded power cord, all new tubes, all new electrolytics, new film coupling caps, and a bunch of new resistors.
6AV6 for the input stage, followed by a 6U8 driver/cathodyne phase inverter, followed by an EL84 push-pull power stage. Very simple, does about 15W per channel.
Lots more info here.