Mark Furneaux | 1991 Technics SA-GX303 Receiver Cooling Mod @TheUbuntuGuy | Uploaded April 2021 | Updated October 2024, 1 hour ago.
These are notorious for melting down due to unfortunate design. After a repair, I wanted to update the design to never fail again. I'm sure I went overboard, but it's cool and quiet and I like both those things. I ended up using the 45-55C temperature range on the controller in the end after extended load testing.

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