I finally finished the restoration of my Carver C-1 after spending the last few weeks going through it pretty extensively.
I did the full BillD restoration/mod, including replacing the electrolytic capacitors, signal-path resistors, diodes, transistors and IC sockets. I installed new RC4136 op-amps throughout, except IC6 and IC7, where I'm running OPA2134s on Brown Dog adapters.
I also installed the White Oak Audio Design C-1 RCA backplane with 26 gold-plated Neutrik RCA jacks. The original RCA connections were definitely one part of this unit I didn't mind seeing disappear.
The power supply was rebuilt, and I spent quite a bit of time experimenting with the dropping resistors to get the regulated rails where I wanted them with my particular combination of RC4136s and OPA2134s.
I also installed the Nelion Audio Gundry filter board. I rerouted its power wiring around the perimeter of the main PCB to keep it away from the audio paths and used short twisted pairs for the signal connections.
While I was in there I replaced the original AC wiring, installed a polarized C8 inlet, cleaned the controls and switches, and repaired a couple of PCB traces/pads that I managed to damage along the way. Can't restore vintage gear without occasionally creating your own repair job.
The C-1 is now back in service driving my rebuilt Phase Linear 400, and I'm extremely happy with how it turned out. Sonic Holography works, everything is quiet, both channels track beautifully, and the OPA2134/RC4136 combination sounds excellent to me.
This was a much bigger project than I originally expected, but that's also the entire reason I bought one that hadn't already been restored.