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6F3P — Triode-Pentode, Noval | Tubeofile
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6F3P
Triode-Pentode — Noval
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Reflector
Data: High
High quality — base, heater, all universal parameters present, and ≥50% of desirable parameters filled in. Safe to use for design decisions.
↗ TDSL
↗ Radiomuseum
Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
6BM8
Functionally similar Western triode-pentode — normally replaceable but slightly different characteristics
ECL82
European equivalent of the 6BM8 — similar function but slightly different specs
Electrical Specifications
Section 1 — Triode (Driver)
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max)
300
V
Anode Dissipation (max)
Anode Dissipation (max)
1.2
W
Typical Operating
Anode Voltage (typical)
Anode Voltage (typical)
250
V
Grid 1 Bias Voltage
Grid Voltage
-2
Notes
6F3P is the Latin transliteration of the Cyrillic designation 6Ф3П.
Contains a triode section and a beam power pentode section in a single Noval envelope.
Radiomuseum lists 6BM8 and ECL82 as 'normally replaceable, slightly different' — not guaranteed pin-compatible drop-in.
Used in 13 documented radio/TV models from 1958-1968.
Quality suffix variants (e.g., 6F3P-E) exist but are not separate tube types — only the base designation is catalogued.
Pin Layout — Noval
1
2
3
4
5
6
7
8
9
1
Pentode Anode
2
Pentode Screen Grid
3
Pentode Cathode
References
https://tdsl.duncanamps.com/show.php?des=6F3P
https://www.radiomuseum.org/tubes/?tube=6F3P
V
Anode Current
Anode Current
6
mA
Anode Resistance
Anode Resistance
30,000
Ω
Transconductance
Transconductance
2.3
mA/V
Amplification Factor (μ)
Amplification Factor (μ)
70
—
Section 2 — Beam Power Pentode (Output)
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max)
300
V
Screen Voltage (max)
Screen Voltage (max)
300
V
Anode Dissipation (max)
Anode Dissipation (max)
9
W
Typical Operating
Anode Voltage (typical)
Anode Voltage (typical)
250
V
Screen Voltage (typical)
Screen Voltage (typical)
250
V
Grid 1 Bias Voltage
Grid 1 Bias Voltage
-7.5
V
Anode Current
Anode Current
44
mA
Transconductance
Transconductance
10.5
mA/V
Output
Output Power
Output Power
4.5
W
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.81
A
4
Heater
5
Heater
6
Triode Anode
7
Pentode Control Grid
8
Triode Grid
9
Triode Cathode