Hi Learner,
I know how you feel! In fact, I have 3 scopes! My 1st is 26 yrs old and
still working. Then I saw another like it for peanuts so I bought it. Then
I found out that both weren't working after long unused. What to do?
You need a scope to troubleshoot a scope! You have to see those
waveforms, like the sawtooth that brings the dot back to the left of the
screen! Luckily, I found a simple (uncalibrated) scope, again for peanuts,
so I bought it just to fix my 2 other.
With just basic math you can design your own circuits, preamps, power
amps. Then if you have a scope you can see the waves you create!
You can even watch a guitar pick-up output- without amplification-
with your scope.
Efren