(194/235) 2025-08-08_18-23-07.jpg
You can see the calibration network inside the 5-pin 240° shell
193: Federal 230's all restored and working. Had to steal a zeroing pot from one of the old ones.
192: Tim saw an old Microchroma computer at a museum - same as my first computer..
191: Used my Russian 1um blocks to test the Federal 230
190: Soldered a brass 3mm nut to replace the broken off tab.
189: Federal 230 - There is supposed to be a post sticking up in the center of this picture - opposite the tab pointing down - limits the travel of the switch - someone forced it and broke it off.
188: Federal 230 Case with new batteries and connector
187: Federal 230 - the tiny breadboard added is a voltage regulator so it works with the new batteries.
186: Federal 230 electronics and project
185: 1uF cap identification
184: Spline shaft project
195: Truing up a DOM pipe for the chemistry hood project.
196: chemistry hood project - rings ready to weld.
197: Broken indicator lot - better shape than I thought - several just need a new crystal. I will bet that more than half are fixable.
198: chemistry hood project -
199: chemistry hood project - welding finished - fixing a work-stool for Nikolaus
200: chemistry hood project - I used fence posts for legs - the small ring reinforces and provides a foot.
201: speaker system - bass is loaded in between my beams and ceiling - sort of like a horn.
202: Chemistry table needed screw to make a stiff connection.
203: Indexing head
204: indexing head disassembly to remove burrs and grit.
