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PL82 — Power Pentode, Noval | Tubeofile | Tubeofile
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PL82
Power Pentode — Noval — Philips
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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
16A5
Similar Tubes (Not Drop-In Compatible)
EL82
Same electrical characteristics but 6.3V/0.8A parallel heater — not a drop-in in 300mA series-string circuits
UL41
Listed as equivalent in Brans — 100mA series-heater pentode with similar characteristics
Electrical Specifications
Section 1 — Pentode
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max, operating)
250
V
Screen Voltage (max)
Screen Voltage (max, operating)
250
V
Anode Dissipation (max)
Anode Dissipation (max)
9
W
Screen Dissipation (max)
Screen Dissipation (max)
2.5
W
Notes
300mA series-string heater (16.5V/0.3A) for AC/DC TV receivers. The 'P' prefix in Mullard/Philips nomenclature denotes a 300mA heater string design.
Valve Equivalents database confirms B9A base, 16.5V heater.
Philips interchange lists 16A5 as the American equivalent designation.
Brans Vademecum lists equivalents: 16A5, N142, UL41.
Electrically identical to EL82 in all electrode characteristics; only the heater differs.
Not interchangeable with EL82 without heater circuit modification.
Pin Layout — Noval
1
2
3
4
5
6
7
8
9
1
No Connection (internal screen)
2
Suppressor Grid (internally connected to cathode)
3
Socket-Compatible Tubes
⚠ Not electrically compatible
6P18P
AL860
EL82
References
https://tdsl.duncanamps.com/show.php?des=PL82
https://www.radiomuseum.org/tubes/?tube=PL82
Cathode Current (max)
Cathode Current (max)
75
mA
Heater-to-Cathode Voltage (max)
Cathode-to-Heater Voltage (max)
100
V
Max Grid Resistor
Grid 1 Resistance (max, auto bias)
1
MΩ
Max Grid Resistor
Grid 1 Resistance (max, fixed bias)
0.4
MΩ
Typical Operating
Anode Voltage (typical)
Anode Voltage
170
V
Screen Voltage (typical)
Screen Voltage
170
V
Grid 1 Bias Voltage
Grid Bias
-10.4
V
Anode Current
Anode Current
53
mA
Screen Current
Screen Current
10
mA
Anode Resistance
Internal (Plate) Resistance
20,000
Ω
Transconductance
Transconductance
9
mA/V
Cathode Resistor (self-bias)
Cathode Resistor (self-bias)
165
Ω
Output
Output Power
Output Power (Class A, single-ended, d=10%)
4
W
Load Impedance
Anode Load Resistance
3,000
Ω
Capacitances
Grid-to-Plate Capacitance
Anode-to-Grid Capacitance (transfer)
<1
pF
Input Capacitance
Input Capacitance
11
pF
Output Capacitance
Output Capacitance
5.9
pF
other
Amplification Factor (g2/g1)
Amplification Factor (g2/g1)
10
Section 2 — Triode Strapped
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max)
250
V
Anode Dissipation (max)
Anode Dissipation (max)
9
W
Cathode Current (max)
Cathode Current (max)
75
mA
Typical Operating
Anode Resistance
Anode Resistance
1,000
Ω
Transconductance
Transconductance
9
mA/V
Amplification Factor (μ)
Amplification Factor (μ)
8.8
—
Heater
Heater Voltage
Heater Voltage
16.5
V
Heater Current
Heater Current
0.3
A
Control Grid
4
Cathode
5
Heater
6
Heater
7
Anode
8
Screen Grid
9
Control Grid (second terminal)