What is the T100(KR) vacuum tube?

The T100(KR) (T100 (KR)) is a triode vacuum tube designed for power (set) applications. Modern KR Audio DHT..

What is a T100(KR) substitute or equivalent?

Direct equivalents to the T100(KR) include None. 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 T100(KR)?

Amplification factor μ ≈ 5.3, transconductance gm ≈ 4.4 mA/V, plate resistance rp ≈ 1.2 kΩ, max plate voltage 1000 V, max plate dissipation 100 W, heater 5 V / 2 A.

Is the T100(KR) still in production?

Production status varies by year and manufacturer. The current Amperatubes catalog classifies the T100(KR) 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 T100(KR) sound like?

Modern KR Audio DHT.. 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.

By Jean-Michel Falligan Devergne · Reviewed May 9, 2026

←T100 (KR)

← SV572-10 T110-1 →Compare…

T100 (KR) T100 (KR) Triode Vacuum Tube

Triode5V / 2ASpecialSPICE

SourceKR Audio T100 datasheet (Solen / Technology Factory)Reviewed2026-05-09StatusDataModelCalcModelNorman KorenPDF

Power triode delivering 100W for push-pull and SET designs

Datasheet ↗SPICE

T100 (KR) — KR Audio — triode vacuum tube — (2000)

5.3

1.2kΩ

4.4mA/V

9.0pF

14.0pF

7.00pF

GAIN5%

POWER100%

DRIVE99%

LINEARITY95%

SPECIFICATIONS

Heater5 V · 2 A

Max Plate Voltage1000 V

Pa max100 W

Gain Factor5.3

gm4.4 mA/V

rp1.2 kΩ

Inter-electrode capacitances

Cgk9 pF

Cgp14 pF

Cpk7 pF

PinoutSpecial

Era2000

RaritySought-after

HEATER5V / 2A

MAX PLATE1000V / 100W

BASEspecial

TYPICAL OPERATING POINT

Va750V

Ia88.34mA

Vg-115.151465V

Pd66.26W

RL3kΩ

Av10.9dB

EXECUTIVE SUMMARY

The T100(KR) is a directly-heated triode from KR Audio, introduced around 2000. It provides a gain factor (μ) of 5.3 with 1200Ω plate resistance. Commonly used in power (set) applications. Modern KR Audio DHT.

APPLICATIONS

SET outputPush-pull outputHeadphone output

Generic triode power (set) stage

• Hi-Fi stereo• Headphone amp• PA/public address

HISTORY

Introduced2000ManufacturerKR Audio

Modern

T100(KR) Datasheet

Frank's Electron Tube Pages · PDF

↗

METRIX TESTER

Test this tube on a Metrix

SIMILAR TRIODES

View all →

01APreamp 100THTransmitting (SET)101DPower (SET)10YPower (SET)12AT7Driver 12AU7Line / Headphone 12AX7Preamp 12AY7Preamp