12V, holy cow!
If I go low voltage I keep it at around 5. I am building a controller
board
with basic stamps and recently fried an A/D chip by letting it have 12V,
it
was lethal.

By the way, talking about overload. The issue of crystals breaking has
been
mentioned a few times, but how do I measure what the crystal "sees" for
current and what is tooo much???


73
Uwe

You can use a panel lamp in series with the crystal to limit the current
(too much current causes the lamp to glow, increasing the resistance,
limiting the current)... Check some of the earlier handbooks for the
proper lamp to use... A 47 might be a good start. This is really a bigger
problem when crystals other than the older pressure mount FT243 are
used (modern plated lead connections) or with larger PA tubes used
as oscillators (6L6, 807, etc.)

Pete