Wattage on 3.4k resistor

[Oddvar R]

What would be the ideal wattage on the 3.4k resistor on the OT tubes? And the 100r/ 1R on the same tubes?

[martin manning]

On both the 100R and 3k4, there is essentially no current flow, so you can choose those for mechanical properties. 1/2 watt is typical. The 1Ω current sense resistors carry considerable current, but at 1Ω very little power is dissipated. Again, most people will choose the wattage rating based on the mechanical properties. One watt is a typical choice, and note that even derated 50% (assume 1/2W), you could put 700 mA through them continuously.

[Oddvar R]

Thanks.