Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Triode
Application
Primary frequency class
UHF
Voltage - Triode (single high frequency) ·Triode
6T4
Miniature low-mu UHF triode for high-frequency amplifier and frequency-converter service.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- 7DK
- Socket code
- B7G
- Base pins
- 7
- Nominal heater
- 6.3 V / 225 mA
Description
Miniature low-mu UHF triode for high-frequency amplifier and converter service.
Socket description
Miniature 7-contact
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- 7DK
- Socket code
- B7G
- Base pins
- 7
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 225 mA
- Parallel heater voltage
- -
- Parallel heater current
- -
- Series capable
- No
7DK - Terminal pinout
Electrical assignments shared by every tube using this base designation.
| Terminal | Section | Connection | Evidence |
|---|---|---|---|
| PIN1P | A | P — Plate (Anode) Source-transcribed; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN2G1 | A | G1 — Control Grid Source-transcribed; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN3H | — | H — Heater Source-transcribed; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN4H | — | H — Heater Source-transcribed; independent manufacturer verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN5K | A | K — Cathode Chart transcription; independent verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN6G1 | A | G1 — Control Grid Chart transcription; independent verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
| PIN7P | A | P — Plate (Anode) Chart transcription; independent verification pending | Unverified EIA Base Connections, printed page 129, 7DK |
Section ratings
1 physical section, each with unique specifications.
Section 1
Triode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 1860 Ω
- Transconductance
- 0.007 S
- Amplification factor
- 13
- Max plate voltage
- 200 V
- Max plate dissipation
- 3.5 W
UHF oscillator triode.
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 1
Triode
Capacitance
Input capacitance
2.6 pF
Output capacitance
0.4 pF
Grid-plate capacitance
1.7 pF
Other
Plate voltage
80 V
ClassA
Cathode resistor
150 ohm
ClassA
Characteristics
Plate resistance
1860 ohm
ClassA
Transconductance
7000 uS
ClassA
Amplification factor
13
ClassA