What is the Nuvistor 7587 vacuum tube?

The Nuvistor 7587 (7587 Nuvistor) is a tetrode vacuum tube designed for preamp / uhf applications. Metal-ceramic Nuvistor..

What are the key specifications of the Nuvistor 7587?

Amplification factor μ ≈ 58, transconductance gm ≈ 10.6 mA/V, plate resistance rp ≈ 200.0 kΩ, max plate voltage 250 V, max plate dissipation 2.2 W, heater 6.3 V / 0.15 A.

Is the Nuvistor 7587 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the Nuvistor 7587 as Sought-after availability. NOS (new-old-stock) examples from RCA, Mullard, Tung-Sol, GE, Sylvania and Telefunken trade among collectors; modern production where it exists comes mostly from JJ Electronic, Electro-Harmonix, Tung-Sol (New Sensor), Genalex, and a handful of small-batch makers.

What does the Nuvistor 7587 sound like?

Metal-ceramic Nuvistor.. Sonic character also depends heavily on the circuit operating point, the surrounding tubes in the stage, and the output transformer when present — use the interactive loadline calculator on this page to explore the trade-offs.

Nuvistor 7587 7587 Nuvistor Tetrode Vacuum Tube

Beam power tetrode rated at 2.2W for high-power output stages

TetrodeHeater 6.3 V · 0.15 A5-pin Nuvistor + Top CapRCA 1960

Plate dissipation: 2.2W
Max plate voltage: 250V
Amplification factor: 58
Transconductance: 10.6mA/V
Plate resistance: 200kΩ

Nuvistor 7587

Characteristics

Datasheet values, once each. Every value cites its sheet.

HeaterIndirectly heated

Specifications of Nuvistor 7587 — Heater
Heater voltageVh	6.3 V
Heater currentIh	0.15 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of Nuvistor 7587 — Limiting values
Plate voltageVa max	250 V
Screen voltageVg2 max	110 V
Plate dissipationPa max	2.2 W
Cathode currentIk max	20 mA
Grid resistorRg1 max	500 kΩ
Peak plate voltageVao	330 V

Mechanical

Specifications of Nuvistor 7587 — Mechanical
Base	5-pin Nuvistor + Top Cap
Rarity	Sought-after
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of Nuvistor 7587 — Small signal
Transconductance	10.6 mA/V
Plate resistance	200 kΩ
Amplification factor	58

Capacitances

Specifications of Nuvistor 7587 — Capacitances
Input	6.7 pF
Grid–plate	0.012 pF
Output	1.4 pF

Charactereditorial reading, not a measurement

Specifications of Nuvistor 7587 — Character
Gain	58%
Power	6%
Drive	0%
Linearity	71%

datasheet cited · model or editorial reading · catalogue value, no citation attached yet · nothing invented

Typical operation

Canonical operating pointModel

B+: 225 V
Load: 400 kΩ
Va: 135 V
Ia: 15.04 mA
Vg: -2.5 V
Pd: 2.03 W
Gain: 33.5 dB

At Q: Norman Koren
μ: 31.8
gm: 11.71 mA/V
rp: 2.7 kΩ

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Using this tube

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Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Source : Radiomuseum 7587 (sharp-cutoff tetrode)Active model : Norman Koren

Manufacturer datasheets

Nuvistor 7587 DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: Radiomuseum 7587 (sharp-cutoff tetrode)
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Norman Koren

Context

The Nuvistor 7587 is a indirectly-heated beam tetrode from RCA, introduced around 1960. It provides a gain factor (μ) of 58 with 200.0kΩ plate resistance. Commonly used in preamp / uhf applications. Metal-ceramic Nuvistor.

History

Introduced: 1960
Manufacturer: RCA
Era: Late Production

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