This is a history of Michael's Power-Supply problem and fixes:


Page 0 -- Correspondence with K7JEB on Power Supply Failure


Page 1 -- Scan of Heathkit HP-10 Info


Page 2 -- Baseline Schematic and Analysis


Page 3 -- Redesign into Darlington Configuration


Page 4 -- Operational Results


Page 5 -- 2N1147 Transistor Data


Page 6 -- 2N6284 Data 1


Page 7 -- 2N6284 Data 2


Page 8 -- Darlington comment


Page 9 -- HP-10 Power Supply Photo


Page 10 -- 2N6284 Photo


Page 11 -- Darlington Connection Photo