ARC gear has always had an affinity with Amperex tubes especially the 6922 types. These just spank any of the Russian varietys including the 6H23N's which are only marginally better than your garden variety Sovtek tube.
My favorites are either the pinched waist 6922s or 7308s from Holland. A quad of either will set you back a serious chunk of change. Good alternatives which are still miles ahead of stock tubes are either bugle boys or orange globes.
My favorites are either the pinched waist 6922s or 7308s from Holland. A quad of either will set you back a serious chunk of change. Good alternatives which are still miles ahead of stock tubes are either bugle boys or orange globes.