On Sat, 2 Jun 2012, Padraigh ProAmerica wrote:

Built a Heathkit tube tester in 1975; and had reason to use it the other
day.

Just wondering if there is any source for updated tube data since then?

How many new tubes were released after 1975? Power tubes yes, but they
likely didn't fit the tester anyway. It was past the time of Nuvistors
and Compactrons, and the 12V tubes for use in cars. Yes, people still used
tubes in 1975, but they were fading (there were already articles about
solid state replacements for tubes by 1975) and not much was being made
with tubes.

Michael VE2BVW