Tuning Indicator vacuum tubes

Triode-TuningIndicator

CEM2 tuning indicator electronic tube specifications and datasheets.

Base

Not recorded

Socket

Not recorded

Heater

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Sections

2

TuningIndicator

Directly heated subminiature voltage indicator designed for visual indication of flip-flop state and other low-power logic conditions.

Base

Subminiature wire-leaded

Socket

B4D

Heater

1 V

Sections

1

TuningIndicator

Low-filament-power electronic tuning indicator developed for battery-operated receivers, providing fluorescent visual tuning indication with minimal heater consumption.

Base

Not recorded

Socket

Not recorded

Heater

1.4 V

Sections

1

TuningIndicator

Miniature directly heated tuning indicator for visual tuning and signal-level indication in low-power battery-operated receivers.

Base

Subminiature

Socket

B9A

Heater

1.4 V

Sections

1

TuningIndicator

Subminiature directly heated electron-ray indicator for compact battery receivers, providing visual signal-strength or tuning indication with very low filament consumption.

Base

Subminiature

Socket

Not recorded

Heater

1.4 V

Sections

1

TuningIndicator

Tuning and modulation indicator combining a fluorescent display with an integral diode for rectifying the indication voltage in radio and monitoring equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Pentode-TuningIndicator

Combination variable-transconductance audio pentode and electron-beam tuning indicator, integrating gain-control or AF amplification with visual receiver tuning.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Pentode-TuningIndicator

Combination remote-cutoff audio pentode and visual tuning indicator, providing variable-gain amplification together with fluorescent receiver tuning or level indication.

Base

Not recorded

Socket

P8A

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Philips electron-ray tuning indicator with integral control triode and fluorescent display for visual receiver tuning or signal-strength indication.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Dual-sensitivity electron-ray tuning indicator with two shadow-angle systems for visual tuning over a broad range of receiver signal strengths.

Base

Not recorded

Socket

P8A

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Philips electron-ray tuning indicator providing fluorescent visual indication of receiver tuning and changing signal-derived control voltage.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Philips fluorescent tuning indicator for visual receiver tuning or signal-level indication.

Base

Not recorded

Socket

Not recorded

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Dual-sensitivity electron-ray tuning indicator with two display systems of different sensitivity for visual tuning across a broad signal range.

Base

Octal

Socket

IO

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Electron-ray tuning indicator for visual receiver tuning and signal-level indication using a fluorescent display system.

Base

Not recorded

Socket

B8G

Heater

6.3 V

Sections

2

Triode-TuningIndicator

Electron-beam tuning indicator for FM and AM receivers, combining an integral control triode with a distinctive three-petal green fluorescent display.

Base

B9A

Socket

B9A

Heater

6.3 V

Sections

2

TuningIndicator

Fluorescent tuning and modulation indicator for visual receiver tuning and modulation-level monitoring in radio and signal-monitoring equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Triode-TuningIndicator

Green electron-beam tuning indicator for FM/AM receivers that also serves as a recording-level indicator in tape equipment.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

2

TuningIndicator

Dual-bar electronic tuning and level indicator with two fluorescent display bars for comparative or simultaneous visual monitoring.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Triode-TuningIndicator

Magic-band tuning indicator with integral triode amplifier and elongated fluorescent display whose illuminated length indicates receiver tuning or signal level.

Base

Noval

Socket

B9A

Heater

6.3 V

Sections

2

TuningIndicator

Miniature tuning indicator with a luminous vertical target strip deposited on the glass envelope for compact visual tuning and signal-level indication.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

TuningIndicator

Magic-band fluorescent tuning indicator for receiver tuning and signal-level display, with luminous-band width varying in response to applied control voltage.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

TuningIndicator

Electron-ray tuning indicator of the EM71/EM85 family, providing a fluorescent visual pattern that varies with receiver control voltage for tuning and signal-level indication.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

1

Triode-TuningIndicator

Sensitive tuning and level indicator combining an amplifying triode with a fluorescent display for receiver tuning, signal-strength, and other variable-level indication.

Base

B9A

Socket

B9A

Heater

6.3 V

Sections

2

Triode-Triode-TuningIndicator

Voltage-comparison indicator combining two matched triode control systems with a fluorescent shadow display for balancing, monitoring, and null-indication applications.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

3

TuningIndicator-TuningIndicator

Double magic-band fluorescent tuning indicator designed for stereo receivers, providing two visual indication systems for tuning, balance, or related stereo functions.

Base

Not recorded

Socket

B9A

Heater

6.3 V

Sections

2

TuningIndicator

OSRAM fluorescent visual tuning indicator designed to convert receiver control-voltage changes into an easily observed indication for accurate station tuning.

Base

Not recorded

Socket

B5

Heater

Not recorded

Sections

1

TuningIndicator

OSRAM fluorescent visual tuning indicator for radio receivers, converting signal-derived control voltage into a visible response for accurate tuning.

Base

Not recorded

Socket

B5

Heater

Not recorded

Sections

1

TuningIndicator

Directly heated OSRAM fluorescent visual tuning indicator for receiver tuning, providing a visible response to changing control conditions.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

TuningIndicator

Indirectly heated OSRAM fluorescent visual tuning indicator for radio receivers, with display appearance varying according to the applied control signal.

Base

Not recorded

Socket

B4

Heater

4 V

Sections

1

Triode-TuningIndicator

Magic-fan fluorescent tuning indicator providing a fan-shaped visual response to receiver control voltage for tuning and signal-strength observation.

Base

Not recorded

Socket

B9A

Heater

12.6 V

Sections

2

TuningIndicator

Single-character vacuum-fluorescent alphanumeric indicator displaying digits, letters, and a decimal point with green-emitting anode segments.

Base

Not recorded

Socket

Not recorded

Heater

1.5 V

Sections

1

TuningIndicator

Single-character vacuum-fluorescent indicator displaying digits and letters using green-emitting segmented anodes viewed through the side of a miniature envelope.

Base

Not recorded

Socket

Not recorded

Heater

1.5 V

Sections

1

TuningIndicator

Single-character vacuum-fluorescent multi-symbol indicator displaying digits, Cyrillic and Latin letters, commas, and other signs with green luminous segments.

Base

Not recorded

Socket

Not recorded

Heater

1.5 V

Sections

1

TuningIndicator

Flat nine-position vacuum-fluorescent segmented indicator for displaying digits and signs, with separate grids controlling each green-emitting position.

Base

Not recorded

Socket

Not recorded

Heater

1.5 V

Sections

1

TuningIndicator

Cathode-ray fluorescent tuning indicator designed to convert receiver signal-derived control voltage into a visible response for accurate tuning.

Base

Not recorded

Socket

Not recorded

Heater

4 V

Sections

1

TuningIndicator

Cathode-ray fluorescent tuning indicator designed for visual receiver tuning, translating changing control voltage into an easily observed display.

Base

Not recorded

Socket

IO

Heater

9 V

Sections

1

TuningIndicator

Cathode-ray fluorescent tuning indicator for radio receivers, translating changing signal-derived control voltage into a visible tuning response.

Base

Not recorded

Socket

Not recorded

Heater

9 V

Sections

1

Triode-TuningIndicator

Series-heater electron-ray indicator with amplifying triode, designed for sensitive visual tuning indication in 300 mA heater-chain equipment.

Base

Noval

Socket

B9A

Heater

4.5 V

Sections

2

TuningIndicator

Cossor neon tuning indicator using a gas-discharge luminous display to provide visible receiver tuning response as applied control conditions change.

Base

Not recorded

Socket

B4

Heater

Not recorded

Sections

1

TuningIndicator

Visual tuning indicator designed for receiver alignment and tuning, converting changing electrical control conditions into an easily observed luminous response.

Base

Not recorded

Socket

B4

Heater

Not recorded

Sections

1

Pentode-TuningIndicator

Series-heater luminous-screen indicator combining variable-pentode action with a fluorescent shadow display whose angle changes with control voltage.

Base

Not recorded

Socket

Not recorded

Heater

15 V

Sections

2

Triode-TuningIndicator

Series-heater luminous tuning indicator with two shadow sectors of differing sensitivity, providing useful indication for both weak and strong received signals.

Base

Not recorded

Socket

Y8A

Heater

15 V

Sections

2

Triode-TuningIndicator

Electron-beam fluorescent tuning indicator using a 12.6 V heater and otherwise electrically equivalent to EM34, providing visual receiver tuning response.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

2

TuningIndicator

Series-heater electron-ray tuning indicator incorporating two display systems of different sensitivity for useful indication across weak and strong signal conditions.

Base

Not recorded

Socket

IO

Heater

12.6 V

Sections

1

TuningIndicator

Series-heater fluorescent tuning indicator designed for AM receivers, providing visible tuning accuracy and received-signal indication.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

1

TuningIndicator

Series-heater fluorescent tuning indicator for receiver applications, controlled by signal-derived voltage to provide an operator-visible aid to accurate tuning.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

1

Triode-TuningIndicator

Series-heater tuning indicator with amplifying triode, designed for receiver tuning or modulation-control service with a sensitive fluorescent visual display.

Base

Not recorded

Socket

B9A

Heater

12 V

Sections

2

TuningIndicator

Magic-fan fluorescent tuning indicator for series-heater receiver equipment, producing a fan-shaped display that varies with control voltage.

Base

Not recorded

Socket

B9A

Heater

19 V

Sections

1