A site’s visitor sent me a link about the $100 per socket:
Despite of the semi-idiocy that is written in the promo material in the link the socket looks like the good one. I would personally would like to see a different type of socket for 6C33C – with filament cooler but it is different level of thinking. Anyhow, if you have $100 to spare per tube socket then here it is.
"I wish I could score everything for horns." - Richard Wagner. "Our writing equipment takes part in the forming of our thoughts." - Friedrich Nietzsche