I learned on a SB-102 in High School. So it'll be nice to have that rig again.  I spent a lot of hours twiddling those knobs back in Hogh School.  So far, the SB-600 Speaker with the internal HP-23A Power Supply, the SB-610 Monitor Scope and the SB-630 Station Console have been rebuilt. A SB-640 External VFO is ready to go as well as a SB-650 Digital Frequency Display.  I've replaced all the electrolytic caps and resistors.  Restorations are never simple.  So I'll be troubleshooting this until it gets back on the air.  There's a working HD-1410 Keyer and an EV 638 Mic to round out this station. I try to keep my stations and their accessories in the same era.