Having become accustomed to helping a friend fix old ham radio gear, 80 volts doesn't strike me as terribly dangerous. In some of this stuff, over half of the

Having become accustomed to helping a friend fix old ham radio gear, 80 volts doesn't strike me as terribly dangerous. In some of this stuff, over half of the power supplies output was dumped as heat in resistive divider networks just to bias things correctly and ensure operation. The filaments worked out to less than a fifth of the load in many cases. Coming from a background of transistors and chips, it was wild to see so many 5 watt or more resistors in use.