16 Feb
2008
16 Feb
'08
8:28 a.m.
On Fri, 15 Feb 2008, William Donzelli wrote:
But there's nonetheless an important difference, namely the oxide cathode.
Tubes in digital applications may be cut off for an extended period of
time, i.e. there is no cathode current. Ordinary tubes (tubes not
specifically made for computers) will create an intermediate layer (?
don't know how this is called in English, "Zwischenschicht" in German) in
the oxide layer which will render the tube unusable ("deaf"), i.e. with
significantly decreased emission (think of a flip-flop that never changes
its state). Another aspect is the guaranteed lifetime of the tube. All
Green Series tubes are specified for at least 10,000 hours of operation.
Christian
I think we
have to
differentiate between "computer tubes" as "tubes that were used in
computers but not specifically made for computers" and "computer tubes"
as
"tubes specifically made for computers/digital applications". I am talking
of the latter.
There really is no difference. Many of the radar types found their way
into computers, and vice versa. The digital application is the
significance. My point is that the thing that pushed the industry to