"Patrick Turner" ha scritto nel messaggio
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It's too early to build something, i have a lot to study and learn
before trying to put tubes together.

Its OK, make a chassis, put 4 valve sockets in,
make a PSU, and you learn by doing,
one bit at a time; or one triode at a time.
You may need a CRO, to SEE what you are doing.
You gotta start someplace....

Perhaps you're right...study without applying has no sense...
Maybe i can find a chep used CRO (no way i can get a new one...).