Carl Lowenstein wrote:
Um, yeah. And the hum as the TV warms up. The occasional maximum
volume screech as the superregenerative amp goes into overload before
the reset circuit hits. And I can go on and on ...
Why hum as the TV warms up? Doesn't seem to be characteristic of
vacuum tubes, but perhaps of poorly designed (to minimize cost)
circuits.
Probably. But that doesn't change the fact that tube circuits always
tried to minimize tube count (for reliability as well as cost) and thus
used grubbier circuits.
I remember the big, old B&W TV's at the houses of my elderly relatives.
They were particularly bad for me because, as a child, I could
apparently hear well into the 20-40KHz audio range. This means that I
could *hear* some of the circuitry in an operating television (I presume
the flyback transformer). Good if you are a 6 year old looking for
video games at Kmart, Sears, etc.; bad if you are a 6 year old watching
television on an ancient TV.
-a
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