[R-390] 6080 in place of 6802 - RMS ???

[mikea]

On Wed, Jan 09, 2002 at 06:51:26PM -0500, James Miller wrote:
> You know I just tried this (threw my back out again, darn it) and I see
> the strangest effect when viewing the ballast tube in the glow of the
> color TV.  The long slender filament actually seems to be vibrating,
> like a wave.  Yes the phase locked TV scan frequency is a little
> different than the line frequency, so this aliasing effect is clearly
> noticable.  Could this 60 Hz vibration of ballast tube filaments be the
> cause of premature failures?

Ah, a truly adventurous soul! I'm sorry about your back, maybe
next time you should try it with an All-American 5, not a BA. ;=)

They do in fact vibrate, yes indeedy, and I would not be at all 
surprised if this were one of the failure factors. I also rather
suspect that the vibration frequency for the ballast isn't quite
60 or 120 Hz, due to mechanical inertia.

Did you see any strobe effect between glowing filaments and TV?

-- 
Mike Andrews
mikea@mikea.ath.cx
Tired old sysadmin since 1964