Anyone out there still remember the M-30B? I am dusting off one at a
local station and have a few questions.

There is an "operate/tune" switch which appears to change the screen grid
bias to reduce the output level when tuning, but the directions for alignment
don't mention it.

It appears I can do all of the tuning up until the output stage section
with the switch set to TUNE. I can tune the output section (plate and
antenna coupling) and get the power set around 95 on the meter, like
the manual says, with the switch set to tune.

I assume, though, that I want to set the antenna coupling control for
final power setting using the switch on OPERATE.

So questions include: how do I use the switch for tuning, AND once I have
done that, is there any reason not to just leave the switch on TUNE in
order to reduce power and extend the life of the final if I don't mind
the reduced range?

Not only that, if I set the antenna coupling for reduced power, is that
going to extend the life of the finals?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."