ECL86 Pentode Vacuum Tube

Triode + Pentode6.3 V · 0.7 A9-pin Noval2 sectionsAlso known as6GW8

By Reviewed May 29, 2026Source : ECL86 triode-section = ½ ECC83 (rec.audio.tubes) · ECL86/6GW8 pentode datasheet (rec.audio.tubes)

ECL86

In brief

TriodeTriode
μ
100
gm
1.6 mA/V
rp
62.5 kΩ
Pa
0.5 W
PentodePentode
μ
21
gm
10 mA/V
rp
48 kΩ
Pa
9 W

The ECL86-T is a indirectly-heated triode from Philips, introduced around 1960. It provides a gain factor (μ) of 100 with 62.5kΩ plate resistance. Commonly used in preamp applications. Triode section. The ECL86-P is a indirectly-heated pentode from Philips, introduced around 1960. It provides a gain factor (μ) of 21 with 48.0kΩ plate resistance. Commonly used in power applications. Pentode section.

Limits

Specifications of ECL86
SpecificationValueSource
Heater
Heater voltage6.3 VDatasheet
Heater current0.7 ADatasheet
Specifications of ECL86-T — Triode
SpecificationValueSource
LimitsDatasheet maximum ratings — not to be exceeded
Max Plate V300 VDatasheet
Pa max0.5 WDatasheet

Typical operation

Canonical operating pointModel
B+
250 V
Load
125 kΩ
Va
150 V
Ia
1.11 mA
Vg
-1 V
Pd
0.17 W
Gain
36.8 dB
At Q
Norman Koren
μ
104.5
gm
1.6 mA/V
rp
65.3 kΩ

Using this tube

APPLICATIONS

Phase splitter
European Hi-Fi integrated amps

Replace or compare

Sources

Manufacturer datasheets

Triode

3 manufacturer datasheets cross-checked for ECL86 — Triode3 verified

Triode-connectedPhilipsJanuary 1970 (1970.01); FP 1999.08.10. 11 pages.

Va
250 V
Vg1
-1.9 V
Ia
1.2 mA
gm
1.6 mA/V
µ
21
Ra
48 Ω

Pentode

3 manufacturer datasheets cross-checked for ECL86 — Pentode3 verified

ECL86 DatasheetLocal mirror · PDF

SPICE models

Revision and verification status

Source
ECL86 triode-section = ½ ECC83 (rec.audio.tubes) · ECL86/6GW8 pentode datasheet (rec.audio.tubes)
Reviewed
2026-05-29
Status
DataModelCalc
Model
SPICE model

Context

HISTORY

Introduced
1960
Manufacturer
Philips
Era
Late Production
METRIX TESTER

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