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EL803
Power Pentode — Noval
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Philips
↗ TDSL
↗ Radiomuseum
Known Equivalents & Substitutes
EL803S
6CK6
6CL6
CV5093
Similar Tubes (Not Drop-In Compatible)
6CH6
Similar power pentode on Noval base — listed as equivalent in Brans Vademecum
6GK6
Similar power pentode on Noval base — related design but different operating points
EL83
Similar power pentode on Noval base — Philips interchange lists as close substitute but different ratings
Electrical Specifications
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
Notes
The EL803S is the improved/successor version with identical base and similar ratings.
Brans Vademecum lists equivalents in table Ve: 6CH6, 6CK6, 6CL6, 6GK6, 7AD7, CV5093.
Philips interchange guide suggests EL83 and 6CK6 as replacements.
Sams substitution guide lists 6CK6 as a substitute (with reservations).
Pin Layout — Noval
1
2
3
4
5
6
7
8
9
1
Internal Connection
2
Control Grid (g1)
3
Cathode
References
https://tdsl.duncanamps.com/show.php?des=EL803
Screen Voltage (typical)
Screen Voltage (typical)
250
V
Grid 1 Bias Voltage
Grid Voltage
-7.5
V
Anode Current
Anode Current
44
mA
Screen Current
Screen Current
5
mA
Transconductance
Transconductance
9
mA/V
Output
Output Power
Output Power
5.5
W
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.76
A
4
Heater
5
Heater
6
Screen Grid (g2)
7
Plate
8
Suppressor Grid (g3)
9
Internal Connection