It is funny you should mention that. I told someone on the
funwithtubes list that the warm up drift he complained about in the
454 was expected because its Nuvistor based vertical amplifiers are
not temperature compensated unlike the later 454A dual FET vertical
amplifiers.
My CA amplifier is pretty drifty as well but it is not temperature
compensated either.
On Fri, 4 Jan 2013 17:04:56 -0700, David DiGiacomo
<daviddigiacomo@...> wrote:
The 475 is definitely a better scope, but... I really enjoy using the
454. The sharp trace is very, very nice. The thing I like least
about it is the DC drift/unstable attenuator balance. You end up
tweaking the vertical position quite a bit.
I wouldn't say either model is particularly reliable or fun to fix.
David Hess