On 8/7/21 8:20 PM, r.stricklin wrote: > > Ugh… I hadn’t even thought of that. You’re confident of it? >
Until someone comes up with a better theory, yes. Consider this supply: http://bitsavers.org/pdf/boschert/Boschert_OL25_Single-Stage_Power_Supply_Maintenance_Manual_May79.pdf Go to the BOM on page 32. Note hat a 10-1038 is a 1N4004, a 10-1013 is a 1N4148, a 13-1055 is a MPS2222, and so on. Your numbers seem to follow this line, just without the prefix, which I assume indicates the general type of component; e.g. 10 - silicon rectifier diode; 13 an NPN transistor, 12 a PNP and so on. Or the BOM on page 10 here: http://bitsavers.org/pdf/boschert/XL25.pdf Follows the same convention, with some of the same part numbers. It's curious that Q1, the inverter power transistor, doesn't appear on the BOM, though the schematic says MJE13006. Could be that there's no substitute. --Chuck
