Thanks and is it due to the high gain issue commonly found in RK242 which made you feel unlistenable? I think the RK 242 is a powerful and dynamic tube which perfectly match with GZ480 in GG2 to get that “alive” tone, All of the others tube I tried are too “slow” when compare with this combo, really want to find something similar as backup,
The 242 when they don't match can distort and be aggressive or be overly flat. They have to get the right match with the pre to do their magic