Electronic Tube & Vacuum Tube Catalog

Plate Resistance: rp

Transconductance: gm (mA/V)

Amplification Factor: μ

Maximum Plate Voltage: Va(max)

Maximum Plate Dissipation: Pa(max)

Maximum Screen Voltage: Vs(max)

Rectifier Nominal Output Current: I(DC)

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2 tubes found

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12AL8
Voltage - Pentode or Tetrode (under 100V)Tetrode-TriodeDissimilar
PDF Google eBay
Base
9GS
Socket code
B9A
Sections
2
Heater
12.6 V / 550 mA
Plate
S1: 30 V / 1.5 W · S2: 30 V / 2.5 W
Screen
S2: 16 V / 0.75 W
Ik max
S1: 20 mA
rP
S1: 13,000 Ω · S2: 480 Ω
gm
S1: 1 mA/V · S2: 15 mA/V
μ
S1: 13 · S2: 7.2
9 pins - B9A - Small-button Noval 9-contact
Medium-mu triode plus space-charge-grid tetrode for low-voltage detector/voltage-amplifier and power-amplifier service; tetrode output is only about 40 mW.
Detector Tube Named For Audio Output Triode Tetrode
Source PDFs (5)
12DY8
Voltage - Pentode or Tetrode (under 100V)Tetrode-TriodeDissimilarCommon cathode
PDF Google eBay
Base
—
Socket code
B9A
Sections
2
Heater
12.6 V / 350 mA
Plate
S1: 16 V · S2: 16 V
Screen
S2: 16 V
rP
S1: 6,000 Ω · S2: 300,000 Ω
gm
S1: 6.7 mA/V · S2: 6 mA/V
μ
S1: 40
9 pins - B9A - Small-button Noval 9-contact
Sharp-cutoff triode-tetrode combination in nine-pin miniature construction for signal and control applications.
Triode Tetrode
Source PDFs (5)

Electrical Summary

General Summary

12AL8

Voltage - Pentode or Tetrode (under 100V)Tetrode-TriodeDissimilar

Heater	12.6 V / 550 mA
Plate	S1: 30 V / 1.5 WS2: 30 V / 2.5 W
Screen	S2: 16 V / 0.75 W
Ik max	S1: 20 mA
rP	S1: 13,000 ΩS2: 480 Ω
gm	S1: 1 mA/VS2: 15 mA/V
μ	S1: 13S2: 7.2

9 pins - B9A - Small-button Noval 9-contact

Medium-mu triode plus space-charge-grid tetrode for low-voltage detector/voltage-amplifier and power-amplifier service; tetrode output is only about 40 mW.

Detector Tube Named For Audio Output Triode Tetrode

12DY8

Voltage - Pentode or Tetrode (under 100V)Tetrode-TriodeDissimilarCommon cathode

Heater	12.6 V / 350 mA
Plate	S1: 16 VS2: 16 V
Screen	S2: 16 V
rP	S1: 6,000 ΩS2: 300,000 Ω
gm	S1: 6.7 mA/VS2: 6 mA/V
μ	S1: 40

9 pins - B9A - Small-button Noval 9-contact

Sharp-cutoff triode-tetrode combination in nine-pin miniature construction for signal and control applications.

Triode Tetrode

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