Data set 01
1950 Sylvania
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power output maximum
43 W
PushPull
Power - Beam (NOT sweep) ·BeamPower
7591
Beam-power pentode designed for audio-frequency power amplification, providing substantial output power with comparatively modest grid-drive voltage.
Directly heatedCold cathodeCommon cathodeDissimilar
- Sections
- 1
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater
- 6.3 V / 800 mA
Description
The 7591 is a beam-power pentode designed for audio-frequency power-amplifier applications, offering substantial output power with comparatively modest drive voltage.
Socket description
International Octal
General specifications
Tube and section characteristics
Properties common to every published source and operating point.
Heater and base
- Base
- -
- Socket code
- IO
- Base pins
- 8
- Nominal heater voltage
- 6.3 V
- Nominal heater current
- 800 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
Beam Power
X-ray radiationInterelectrode capacitances
- Plate resistance
- 29000 Ω
- Transconductance
- 0.0102 S
- Amplification factor
- 16.8
- Max plate voltage
- 550 V
- Max screen voltage
- 440 V
- Max plate dissipation
- 19 W
- Max screen dissipation
- 3.3 W
- Max cathode current
- 85 mA
Published ratings and characteristics mapped semantically; 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
1961 Tung Sol
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Other
Power Output
19 W
ClassA1;Typical
Capacitance
Grid To Plate Capacitance
0.25 pF
Input Capacitance
10 pF
Output Capacitance
5 pF
Data set 03
1965 Sylvania Electronic Tubes Vol3
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
Heater Voltage
6.3 V
Heater Current
800 mA
Transconductance
10200 uS
Plate Resistance
29000 ohm
Amplification Factor
16.8
Other
Plate Voltage
300 V
ClassA
Screen Voltage
300 V
ClassA
Grid Voltage
-10 V
ClassA
PlateCurrentZeroSignal
60 mA
ClassA
PlateCurrentMaximumSignal
75 mA
ClassA
ScreenCurrentZeroSignal
8 mA
ClassA
ScreenCurrentMaximumSignal
15 mA
ClassA
Load Resistance
3000 ohm
ClassA
Power Output
11 W
ClassA
Power Output
32 W
TwoTubes;PushPull;ClassAB;UltraLinear;PlateSupply=400V
Power Output
43 W
TwoTubes;PushPull;ClassAB;Plate=450V
Data set 04
1966 Tung Sol Electronic Tubes 4 of 4
Published operating points and test conditions from this source.
SECTION 1
Beam Power
Characteristic
Heater Voltage
6.3 VOLTS
PublishedTable
With Cathode Bias
7 MEGOHMS
PublishedTable
Heater Current
80 AMP
PublishedTable
Plate Voltage
300 VOLTS
PublishedTable
Screen Voltage
300 VOLTS
PublishedTable
Grid #1 Voltage
1 VOLTS
PublishedTable
Peak Af Grid Voltage
10 VOLTS
PublishedTable
Plate Current (Zero Signal)
60 MA
PublishedTable
Screen Current (Zero Signal)
8 MA
PublishedTable
Transconductance
10200 uMHOS
PublishedTable
Plate Resistance
0 OHMS
PublishedTable
Load Resistance
3000 OHMS
PublishedTable
Power Output
11 WATTS
PublishedTable
Total Harmonic Distortion
13 PERCENT
PublishedTable
Plate Supply Voltage
450 VOLTS
PublishedTable
Other
Maximum Plate Voltage
550 VOLTS
PublishedTable
Maximum Screen Voltage
440 VOLTS
PublishedTable
Maximum Plate Dissipation
19 WATTS
PublishedTable
Maximum Scre En Dissipationa
3.3 WATTS
PublishedTable
Maximum Cathode Current
85 MA
PublishedTable
Plate Current (Max. Signal)
75 MA
PublishedTable
Screen Current (Max. Signal)
15 MA
PublishedTable