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Telefunken ‘Hexode’ YL1260
This is a giant tube. With around 500 grams of weight, definitely this is a heavy weight class. It's a Pentode with shadow grid to reduce the screen current - so we should call it a Hexode. Its filament rated at around 12.5V and 2.3A. At around 25W filament, it shouldn't be that hot. As…