Data set 01
1960 Mazda
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Characteristics
Filament current minimum
45 mA
Filament current maximum
55 mA
Voltage Dual Tetrode ·Tetrode-Tetrode
6196
Directly heated dual space-charge tetrode electrometer tube designed for highly stable bridge circuits measuring extremely small currents and voltages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 3 V / 50 mA
Description
Directly heated dual space-charge tetrode electrometer tube for highly stable bridge measurement circuits.
Socket description
Small-button Noval 9-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater voltage
- 3 V
- Nominal heater current
- 50 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
2 physical sections, each with unique specifications.
Section 1
Tetrode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.00002 S
- Max plate voltage
- 9 V
First physical tetrode element of Mazda/National Union 6196 split double electrometer tetrode, represented here as MEASURING element with top-cap grid-2 input. Tube has two symmetrical grid-2/anode elements on either side of the direct-heated 3 V 50 mA filament with common space-charge grid-1; second COMPENSATING element is separate physical section 2. Ratings PER ELEMENT: maximum anode voltage 9 V, grid-1 6 V, grid-2 negative limit -2 V as manufacturer labeled. Typical Va 9 V, g1 +6 V, g2 -4 V, transconductance about 20 µmhos (0.00002 S) per element; sample anode current varies in Mazda/National Union sheets. Measuring grid-2-to-other-electrodes capacitance 3.7 pF; very high grid leakage resistance (>10^15 Ω), minute inverse grid current, designed for stabilized balanced Wheatstone-bridge electrometer circuits. Shared filament/space-charge electrode do not collapse two physical tetrode elements into one row.
Section 2
Tetrode
X-ray radiationInterelectrode capacitances
- Transconductance
- 0.00002 S
- Max plate voltage
- 9 V
Second physical Tetrode element of Mazda/National Union 6196 split electrometer tube: COMPENSATING element, grid-2 pin 2 and anode pin 5, sharing directly heated filament and grid-1 with the MEASURING element in section 1 (ID 9724). Per-element plate maximum 9 V, typical gm 20 µmhos (0.00002 S) at anode 9 V, space-charge grid +6 V, control grid -4 V. Typical measuring grid-2 capacitance 3.7 pF to other electrodes and extreme insulation. Dual symmetrical elements support a stable balanced Wheatstone-bridge electrometer circuit. These represent two physical tetrode sections, not alternative 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.
Data set 02
1968 Mazda Belvu
Published operating points and test conditions from this source.
SECTION 1
Tetrode
Other
HeaterVoltageNominal
3 V
Nominal
HeaterCurrentNominal
50 mA
Nominal
Maximum Plate Voltage
9 V
Characteristic
Transconductance
20 µS
Typical