Data set 01
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Pentode
Characteristic
Transconductance
15000 uS
Typical
Plate Resistance
156000 ohm
Typical
Voltage Pentode - Sharp Cutoff (single) ·Pentode
3HM6
Frame-grid sharp-cutoff pentode for high-gain television intermediate-frequency amplifier stages.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- B9A
- Base pins
- 9
- Nominal heater
- 3.15 V / 600 mA
Description
Frame-grid sharp-cutoff pentode for television IF amplifier stages.
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
- 3.15 V
- Nominal heater current
- 600 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
Pentode
X-ray radiationInterelectrode capacitances
- Plate resistance
- 156000 Ω
- Transconductance
- 0.015 S
- Max plate voltage
- 300 V
- Max screen voltage
- 300 V
- Max plate dissipation
- 2.5 W
- Max screen dissipation
- 0.55 W
- Max cathode current
- 25 mA
- Rectifier max heater-cathode voltage
- 200 V
- Rectifier warm-up time
- 11 s
Published promoted fields populated by semantic headings; identical repeated sections compressed.
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
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
125 V
Screen-grid voltage
125 V
Cathode bias resistor
56 Ohm
Plate current
13 mA
Screen-grid current
3.2 mA
Characteristics
Plate resistance
156000 Ohm
Transconductance
15000 uS
Control-grid cutoff voltage
-3 V
Hot input resistance
13500 Ohm
Capacitance
Grid-to-plate capacitance
0.024 pF
Shielded
Input capacitance
8.7 pF
Shielded
Output capacitance
3 pF
Shielded
Data set 03
1966 Tung Sol Electronic Tubes 1 of 4
Published operating points and test conditions from this source.
SECTION 1
Pentode
Other
Plate voltage
125 V
IFAmplifier
Screen voltage
125 V
IFAmplifier
Cathode-bias resistor
56 Ω
IFAmplifier
Plate current
13 mA
IFAmplifier
Screen current
3.2 mA
IFAmplifier
Characteristic
Transconductance
15000 µS
Section1
Plate resistance
0.156 MΩ
Section1
Hot input resistance at 44 MHz
13000 Ω
Section1
Grid-1 voltage at 100 uS transconductance
-3 V
Section1
Capacitance
Hot input capacitance at 44 MHz
7.4 pF
Section1