I decide to add heatsink to some of the components on my Elekit TU-8500. By default, most of the components on the Elekit TU-8500 do not have (and do not need) any heatsink. This because based on the specification, they should be fine to work without any heatsink as the working temperature is still within threshold. But I realize when I use E80CC tubes which has double of the filament current, some of the diodes are significantly hotter (10-15 degree Celcius). So this video will show how do I add heatsink on it. Enjoy!