EL803

Name: EL803
Brand: Philips

Power Pentode — Noval — Philips

+ Compare ⚡ Roll

Data: MediumMedium quality — at least 60% of universal parameters and pins are present, but some key data is missing. Verify specific values against datasheets before critical use.

↗ TDSL ↗ Radiomuseum

Known Equivalents & Substitutes

EL803S6CK6 6CL6CV5093

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)300V

Screen Voltage (max)Screen Voltage (max)300V

Anode Dissipation (max)Anode Dissipation (max)9W

Typical Operating

Anode Voltage (typical)Anode Voltage (typical)250V

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

1Internal Connection

2Control Grid (g1)

3Cathode

Socket-Compatible Tubes ⚠ Not electrically compatible

6BW4 6GK6 6P14P 6P33P 6P43P 7189A 8BQ5 AL860 D3a E186F E280F EF800 EL84 EL85 EZ80

References

https://tdsl.duncanamps.com/show.php?des=EL803

Screen Voltage (typical)Screen Voltage (typical)250V

Grid 1 Bias VoltageGrid Voltage-7.5V

Anode CurrentAnode Current44mA

Screen CurrentScreen Current5mA

TransconductanceTransconductance9mA/V

Output

Output PowerOutput Power5.5W

Heater

Heater VoltageHeater Voltage6.3V

Heater CurrentHeater Current0.76A

4Heater

5Heater

6Screen Grid (g2)

7Plate

8Suppressor Grid (g3)

9Internal Connection

EZ81

PL84

UEL84