What is the 5654 vacuum tube?

The 5654 (5654 / CK5654) is a pentode vacuum tube designed for rf / preamp applications. Military miniature..

What is a 5654 substitute or equivalent?

Direct equivalents to the 5654 include CK5654, EF95, 6AK5. These share the same pinout and operating envelope, so they can usually be swapped without circuit changes — though batch-to-batch variations between manufacturers (NOS vs current production) may shift the sonic character noticeably.

What are the key specifications of the 5654?

Transconductance gm ≈ 5 mA/V, plate resistance rp ≈ 340.0 kΩ, max plate voltage 200 V, max plate dissipation 1.65 W, heater 6.3 V / 0.175 A.

Is the 5654 still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the 5654 as Common 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 5654 sound like?

Military miniature.. 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.

5654 CK5654 Pentode Vacuum Tube

Also known as CK5654

Small-signal pentode for low-noise voltage amplification

PentodeHeater 6.3 V · 0.175 A7-pin MiniatureRaytheon·GE 1953

Plate dissipation: 1.65W
Max plate voltage: 200V
Transconductance: 5mA/V
Plate resistance: 340kΩ

5654

Characteristics

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

HeaterIndirectly heated

Specifications of 5654 — Heater
Heater voltageVh	6.3 V
Heater currentIh	0.175 A

Limiting valuesDatasheet maximum ratings — not to be exceeded

Specifications of 5654 — Limiting values
Plate voltageVa max	200 V
Screen voltageVg2 max	155 V
Plate dissipationPa max	1.65 W
Screen dissipationPg2 max	0.55 W
Cathode currentIk max	20 mA
Grid resistorRg1 max	100 kΩ
Peak plate voltageVao	600 V
Heater–cathode voltageVhk max	135 V

Mechanical

Specifications of 5654 — Mechanical
Base	7-pin Miniature
Rarity	Common
Pinout

Small signalDatasheet parameters at the reference operating point — not limits

Specifications of 5654 — Small signal
Transconductance	5 mA/V
Plate resistance	340 kΩ

Capacitances

Specifications of 5654 — Capacitances
Input	4 pF
Grid–plate	0.02 pF
Output	2.85 pF

Charactereditorial reading, not a measurement

Specifications of 5654 — Character
Gain	0%
Power	4%
Drive	0%
Linearity	75%

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

Using this tube

Applications

Voltage amplifier

Generic pentode rf / preamp stage

Replace or compare

Sources

By Jean-Michel Falligan DevergneReviewed May 29, 2026Active model : Koren pentode

Manufacturer datasheets

24 manufacturer datasheets cross-checked for 5654 / CK565424 verified

Triode-connectedSiemens1.4.60 (1er avril 1960) — allemand

Va: 120 V
Ia: 10 mA
gm: 6.7 mA/V
µ: 4.8
Ra: 4.8 Ω

5654 DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source: Raytheon·GE
Reviewed: 2026-05-29
Status: DataModelCalc
Model: Koren pentode

Context

The 5654 is a indirectly-heated pentode from Raytheon·GE, introduced around 1953. Commonly used in rf / preamp applications. Military miniature.

History

Introduced: 1953
Manufacturer: Raytheon·GE
Era: Golden Age

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