Heatsink for A40 transistors??

[Robbie010]

I have decided to breakdown the A40 I got and split it in two enclosures to make for easier access to the components. I was thinking of mounting each output transistor on its own heatsink on the outside of the amp but I'm not sure what dissipation rating I would need for each heatsink?

Would I get away with using something like this for each transistor?

SS415% TO-3 holes x1 Aluminum Black Heatsink Heat Sink Audio Amplifier 2311040415128 | eBay

Thanks.

 

[6L6]

That's pretty small, you'd almost certainly need a fan. Generally speaking, get the biggest heatsink you can fit.