Well looky here!
As I hopscotch my way back through my projects, I pulled the chassis and started checking resistors. Replaced some half watters that were somewhat out of tolerance, then I hit this.
The third color band on the top resistor could be red, could be brown, could be black....but in any event it's obviously been overheated. Resistance on that one reads 4K, so either way it's wildly out of tolerance.
The other resistor appears to be a 22 ohm resistor reading 208 ohms, which is leaving me
, but in any event both have obviously been overheated and aren't what they should be. I bet these are what got toasted when the yoke failed.
I ordered 5 watt replacements from Mouser, which are en route. Hopefully this is on track to curing the wild linearity issue.