Alternatives & variations Download PDF datasheet

3BGP11

Three-inch direct-view oscilloscope CRT with electrostatic focusing and deflection. Its P11 blue, short persistence screen and published deflection characteristics support compact precision oscillographic instrumentation.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: B12A
Base pins: -
Nominal heater: 1.5 V / 140 mA

Description

Sylvania 3BGP11 direct-view oscilloscope CRT with electrostatic focus/deflection; P11 blue, short persistence. Published maximum ratings, capacitances, and typical operating conditions were extracted from the supplied datasheet.

Socket description

Duodecal 12-contact

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: B12A
Base pins: -
Nominal heater voltage: 1.5 V
Nominal heater current: 140 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

Cathode Ray

X-ray radiationInterelectrode capacitances

Max plate voltage: 2750 V

Published CRT maximum ratings, capacitances, and operating conditions extracted from supplied Sylvania datasheet.

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.

Data set 01

1965 Sylvania Electronic Tubes Vol3

Published operating points and test conditions from this source.

SECTION 1

Cathode Ray

Characteristic

Heater Voltage
1.5 V
Heater Current
140 mA
FocusingMethod
Electrostatic
DeflectionMethod
Electrostatic
Phosphor
P11 blue, short persistence
MinimumUsefulScreen
2.25 x 1.125 in
GridToAllCapacitance
4.5 pF
BetweenDeflectionPlates1_2Capacitance
2 pF
BetweenDeflectionPlates3_4Capacitance
2.5 pF
P1LightOutputMinimum
20 ft-L
P1 variant/reference condition
LineWidthMaximum
0.65 mm

Other

Anode2VoltageMaximum
2750 V
Anode1FocusVoltageMaximum
1100 V
GridNegativeBiasMagnitudeMaximum
200 V
GridPositivePeakVoltageMaximum
2 V
PeakHeaterCathodeVoltageNegative
140 V
PeakVoltageAnode2ToDeflectionPlate
550 V
Anode2Voltage
2000 V
Anode1VoltageForFocus
400-700 V
GridVoltageForCutoff
-38 to -67.5 V
DeflectionFactorPlates1_2
68-92 V/in
DeflectionFactorPlates3_4
28-38 V/in
GridCircuitResistanceMaximum
1.5 Mohm
DeflectionCircuitResistanceMaximum
1 Mohm
Anode2PowerInputMaximum
6 W
AltitudeMaximum
35000 ft