Purpose
This thread plans to be an open discussion related to tubes. I am a tube roller interested in their history, pinouts, internal construction and date codes. I also try to measure them using my basic tube tester. I am doing this for several years, started a thread more as a personal blog...
I will be travelling to Paris in the coming days and to London in about a month. I was wondering, if there are any Parisians or Londoners on board who can direct me to some shops where I can get tubes/valves.
I loved getting Takatsuki 274b's from Tokyo, and bring them in safety without...