-
available variable-mu
pentodes were the RCA 239 in 1932 and the
Mullard VP4 in 1933.
Power pentodes or power-amplifier
pentodes.
Power pentodes are
designed to...
- work in the VHF range. The 954 and 956
types are
sharp and
remote cut-off
pentodes, respectively, both also with
indirect 6.3 V, 150 mA heaters.
Types 957...
-
became obsolete in the
middle 1950s.
Pentode field-effect
transistors having 3 gates,
similar to
vacuum tube
pentodes have also been
described Triple emitter...
- for
amplification and switching.
Additional electrodes create tetrodes,
pentodes, and so forth,
which have
multiple additional functions made
possible by...
-
guitar amplifiers use a
class AB1 push-pull
circuit with a pair of
power pentodes or beam tetrodes, 6L6 or EL34 but
occasionally KT88, 6550, or the lower-power...
-
computer had
roughly 2000
vacuum tubes (mostly type CV2179/A2134
pentodes, EL81
pentodes and CV2493/ECC88
double triodes) and 2000
germanium diodes. Nineteen...
- same
principle was
applied to
other types of multi-grid
tubes such as
pentodes. As an example, the
Sylvania 12K5 is
described as "a
tetrode designed for...
-
electrically to the
octal base EF37A and the
Rimlock base EF40.
Unlike many
pentodes, it was
designed specifically for
audio applications, with low
noise and...
- The 955 is a triode. The 954 and 956
types are
sharp and
remote cut-off
pentodes, respectively, all with
indirect 6.3 V, 150 mA heaters.
Types 957, 958...
- 1920s, have Cag of only 1 or 2 fF,
around a
thousand times less. 'Modern'
pentodes have
comparable values of Cag.
Triodes were used in VHF
amplifiers in 'grounded-grid'...
