Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater Warmup Time
11 s
Voltage Pentode - Sharp Cutoff (single) ·Pentode
3CE5
Sharp-cutoff high-frequency pentode for compact RF/IF equipment operating to approximately 400 MHz.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7BD
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 3.15 V / 600 mA
Description
Sharp-cutoff pentode used as an RF or IF amplifier in compact radio equipment at frequencies up to 400 MHz.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7BD
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 3.15 V
- Nominal heater current
- 600 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7BD - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1G1 | A | G1 — Control Grid EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN2G3 | A | G3 — Suppressor GridGroup 7BD2 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN2IS | A | IS — Internal ScreenGroup 7BD2 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN2K | A | K — CathodeGroup 7BD2 EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN3H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN4H | — | H — Heater EIA transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN5P | A | P — Plate (Anode) EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN6G2 | A | G2 — Screen Grid EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN7G3 | A | G3 — Suppressor GridGroup 7BD7 EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN7IS | A | IS — Internal ScreenGroup 7BD7 EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
| PIN7K | A | K — CathodeGroup 7BD7 EIA chart transcription; manufacturer confirmation pending | Unverified EIA Base Connections, printed page 128, 7BD |
Section ratings
1 physical section, each with unique specifications.
Section 1
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 300000 Ω
- Transconductance
- 0.0076 S
- Amplification factor
- 42
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 2 W
- Max screen dissipation
- 0.5 W
- Rectifier warm-up time
- 11 s
Published ratings/characteristics promoted where semantically applicable; supplemental values retained in parameter table.
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
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Heater voltage
3.15 V
Published heater rating
Heater current
600 mA
Published heater rating
Plate resistance
300000 ohm
Published
Transconductance
7600 µS
Published
Capacitance
Grid-to-plate capacitance
0.03 pF
Published
Other
Plate voltage
125 V
Published
Screen voltage
125 V
Published
Grid 1 supply voltage
-1 V
Published
Plate current
11 mA
Published
Screen current
2.8 mA
Published
Data set 03
1975 RCA RC30
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
rf or if amplifier at frequencies up to
400 MHz
Published in approved 6CE5 target datasheet entry; Section1
Heater Voltage (ac/dc) 3.15
6.3 V
Published in approved 6CE5 target datasheet entry; Section1
Heater Current 0.6
300 mA
Published in approved 6CE5 target datasheet entry; Section1
Heater Warm-up Time (Average)
11 seconds
Published in approved 6CE5 target datasheet entry; Section1
Grid-No.l (Control-Grid) Voltage, Positive-bias value. 0.006 0
0 V
Published in approved 6CE5 target datasheet entry; Section1
For grid-No.2 voltages up to
150 V
Published in approved 6CE5 target datasheet entry; Section1
For grid-No.2 voltages between 160 and
300 V
Published in approved 6CE5 target datasheet entry; Section1
Capacitance
Internal Shield
6.5 pF
Published in approved 6CE5 target datasheet entry; Section1
Shield
1.8 pF
Published in approved 6CE5 target datasheet entry; Section1
Grid No.l to Plate and Grid No.2
2.5 pF
Published in approved 6CE5 target datasheet entry; Section1
Grid No.l to Cathode, Heater, Grid No.3, and Internal Shield
3.9 pF
Published in approved 6CE5 target datasheet entry; Section1
Characteristic
Cathode-Bias Resistor 820 180 100
180 Ω
Published in approved 6CE5 target datasheet entry; Section1
Plate Resistance (Appro*.) 0.009 0.6 0.5
0.8 MΩ
Published in approved 6CE5 target datasheet entry; Section1
Transconductance 4400 4900 6100
6700 µS
Published in approved 6CE5 target datasheet entry; Section1
Plate Current 8 6 4.7 8
7.6 mA
Published in approved 6CE5 target datasheet entry; Section1
Grid-No.2 Current — — 1.4 2.4
2.1 mA
Published in approved 6CE5 target datasheet entry; Section1