Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Pentode
Application
Computer service
Yes
Voltage Pentode ·Pentode
6888
Dual-control pentode designed specifically for switching and early computer circuitry, supporting logic, gating, and pulse-control functions.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 800 mA
Description
Dual-control computer pentode designed for switching and computer service.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 800 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
Terminal pinout
Electrical assignments shared by every tube using this base designation.
No verified pinout is recorded for this base designation.
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 250 V
- Max screen voltage
- 150 V
- Max plate dissipation
- 8 W
- Max screen dissipation
- 2 W
- Max grid dissipation
- 2 W
- Max cathode current
- 80 mA
Sylvania 6888 dual-control computer pentode for pulse amplifiers, core drivers and coincidence logic. Indirect heater 6.3 V 0.8 A, eight-pin octal 8N basing. Absolute DC maximum plate voltage 250 V, DC cathode current 80 mA, plate dissipation 8 W, grid-2 screen dissipation 2 W, grid-3 dissipation 2 W. DISTINCT pulse-only limits: plate PEAK positive 500 V and peak cathode current 600 mA, subject to specified pulse duration and duty factor; never substitute for DC limits. Published screen positive DC max 150 V; grid-3 has own positive/negative bias and pulse limits. Unshielded direct capacitances: grid-1 to plate 0.70 pF, grid-3 to plate 3.8 pF, grid-1 input 12 pF, grid-3 input 6.0 pF, output 6.5 pF, grid-1 to grid-3 0.65 pF. No single intrinsic gm value promoted from non-equivalent grid/pulse modes.
Source-dependent data
Operating conditions by source
Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.