Heathkit Oscilloscope O-12 Restoration & Repair 2 - Component testing

Testing of the resistors and doing redlines of the schematics on the Heathkit Oscilloscope model O12 including a mistake found either in the unit or the schematic. Also the ordering of components needed to continue this operation. To speed things up I decided to just order all caps to be replaced as part of the repair and restoration of this unit.

[YouAllKnowBob]

If you look at that schematic again, the voltages after the 100 ohm resistor are in the 300's. The 450 written there is the capacitor voltages.

[jggmobile]

I was watching another video on this scope. The guy found the same missing resister. He found that the assembly instructions did not mention the 100 ohm resister . He concluded that the schematic was an error.

[tubeDude]

I use Mouser for all replacement parts.

[jameswarren]

Did you save the parts list? I’d love to have it!