Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 2
Tuning Indicator
Characteristic
HeaterOrFilamentVoltage
2.5 V
HeaterOrFilamentCurrent
800 mA
Tuning Indicator ·Triode-TuningIndicator
2E5
Electron-ray visual indicator for receiver tuning or electrical level indication, using a fluorescent display whose pattern changes with control voltage.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 2
- Base
- 6R
- Socket code
- -
- Base pins
- 6
- Nominal heater
- 2.5 V / 800 mA
Description
Electron-ray tuning indicator with a 2.5 V heater and published target-voltage and shadow-angle operating conditions.
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 6R
- Socket code
- -
- Base pins
- 6
- Nominal heater voltage
- 2.5 V
- Nominal heater current
- 800 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
6R - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1H | — | H — Heater EIA chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 127, 6R |
| PIN2D | A | OTHER — Other Identified Element Source D denotes deflecting electrode; generic OTHER element 40 pending canonical refinement | Unverified EIA Base Connections, printed page 127, 6R |
| PIN3G1 | A | G1 — Control Grid EIA chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 127, 6R |
| PIN4T | A | T — Target EIA chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 127, 6R |
| PIN5K | A | K — Cathode EIA chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 127, 6R |
| PIN7H | — | H — Heater EIA chart transcription; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 127, 6R |
Section ratings
2 physical sections, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
No fixed ratings are recorded for this section.
Internal sharp-cutoff amplifier section.
Section 2
Tuning Indicator
X-ray radiationInterelectrode capacitances
- Max plate voltage
- 250 V
Fluorescent indicating target section.
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
195X General Electric Essential Characteristics
Published operating points and test conditions from this source.
SECTION 2
Tuning Indicator
Other
Target voltage maximum
250 V
TuningIndicator
Target voltage minimum
125 V
TuningIndicator
Plate voltage
250 V
TuningIndicator
Plate series resistance
1000000 Ω
TuningIndicator
Target voltage
250 V
TuningIndicator
Grid voltage
-8 V
Shadow0Degrees
Grid voltage
0 V
Shadow90Degrees
Plate current
0.24 mA
Shadow90Degrees
Target current
4 mA
TuningIndicator
Data set 03
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Triode
Other
SeriesTriodePlateResistor
1 Mohm
PlateAndTargetSupply=200V
Characteristic
TriodePlateCurrent
0.19 mA
TriodeGridVoltage=0V;Supply=200V
SECTION 2
Tuning Indicator
Other
Target Voltage Maximum
250 V
Target Voltage Minimum
100 V
Characteristic
Target Current
3 mA
TriodeGridVoltage=0V;Supply=200V