I have a Seek Thermal Imaging camera for my Android phone so I thought I'd take a pic of the 5F6A '59 Bassman chassis at idle temperature so we can see what's hot and what's not. I was surprised to see the power tubes are hotter than the rectifier tube.
1. V1 Load Resistors. 2. V2B Cathode Resistor. 3. Socket mounted V2A Load Resistor. 4. B+4 Voltage Dropping Resistor. 5. Phase Inverter Load Resistors. 6. B+3 Voltage Dropping Resistor. 7. Pilot Light. 8. Rectifier Socket mounted Backup Diodes and .01uF 3KV disk capacitor.