Low Noise Pentode
Reddish Orange Printing
The Amperex P.Q. Gold Pin 7788 Vacuum tube is a special quality
high slope pentode designed for use in industrial
equipment where stability of characteristics and long
life are required. It is a wideband RF device, but no
frequency range is given. From the information available
it appears that 40 - 100 MHz is a probable upper value.
Oscilloscope amplifiers and other measuring instruments
are likely candidates for this valve.
It is also highly prized by Audiophiles for use in
high end sterio equipment.
Electrical Data:
Filament.................... 6.3V
Prefered Substitutes .................. E810F, CV5809