c) Fortunately, 25L6 tubes are available on e-bay ?
?;-))
25L6GTs went from being a junk tube to one of moderate value in the
space of just a few years. As the audio guys get desperate for the
"next great undiscovered tube", high voltage filament output tubes of
the late 1930s and 40s, like the 25L6GT, are finding their way in
amps. They are still pretty reasonable to buy, but you could have said
that about 6SN7GTs ten years ago, too.
So, if you have an 026, stock up on 25L6GTs, before they dry up.
--
Will