Snark wrote:

I'm repairing a 70's scope with this tube. Except for it apparently
having been made by Hitachi, web searches haven't turned up anything
useful.


5" with a P31 phosphor. You didn't say if it was round, square or
rectangular. I saw some Hitachi CRTs in later model Heathkit scopes,
but I don't know if they were originals. They looked to be a Japanese
version of a 5UP31


--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.