Ampera
6688
Pentode · IHT · 7-pin Miniature · 1958
“Selected pentode.”
Small-signal pentode for low-noise voltage amplification
Datasheet ↗SPICE
TRANSCONDUCTANCE0mA/V
Cgk0pF
Cgp0pF
Cpk0pF
GAIN0%
POWER7%
DRIVE50%
LINEARITY75%
EXECUTIVE SUMMARY
The 6688 is a indirectly-heated pentode from RCA, introduced around 1958. Commonly used in preamp applications. Selected pentode.
APPLICATIONS
Voltage amplifier
Generic pentode preamp stage
VS CK6688
Pd 0%Full comparison →
HISTORY
Introduced1958ManufacturerRCAEquivalentsCK6688
Golden AgeSPECIFICATIONS
Heater Voltage6.3V
Heater Current0.175A
Max Plate Voltage300V
Max Power2.7W
Sensitivity5 mA/V
Gain Factor—
Internal Impedance—
Pinout7-pin Miniature
Era1958
RarityModerate
Input Capacitance5pF
Miller Capacitance0.005pF
Output Capacitance3.5pF