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6CH6 — Power Pentode, Noval | Tubeofile
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6CH6
Power Pentode — Noval
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GE
Data: Medium
Medium 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
EL821
CV2127
6132
7499
Similar Tubes (Not Drop-In Compatible)
6AG7
Similar power pentode but Octal base — not pin-compatible
6CK6
Similar pentode on Noval base — verify pinout compatibility
6CL6
Similar power pentode on Noval base but different pinout and lower gm — not a drop-in
Electrical Specifications
Absolute Maximum
Anode Voltage (max)
Anode Voltage (max)
275
V
Screen Voltage (max)
Screen Voltage (max)
275
V
Anode Dissipation (max)
Anode Dissipation (max)
12
W
Heater-to-Cathode Voltage (max)
Heater-to-Cathode Voltage (max)
100
V
Typical Operating
Notes
GE Essential Characteristics: Pa_max 12 W, Va_max 275 V, Vs_max 275 V, gm 11000 umhos, Rp 50000 ohms.
Philips interchange lists EL821 as the European equivalent, CV2127 as the British military designation.
Sams substitution guide lists 6132 and 7499 as substitutes.
High gm (11000 umhos) and 12 W anode dissipation — more of a power tube than small-signal type despite pentode construction.
Pin Layout — Noval
1
2
3
4
5
6
7
8
9
1
Control Grid (g1)
2
Cathode
3
Heater
References
https://tdsl.duncanamps.com/show.php?des=6CH6
Anode Voltage (typical)
Anode Voltage (typical)
250
V
Screen Voltage (typical)
Screen Voltage (typical)
250
V
Grid 1 Bias Voltage
Grid 1 Bias Voltage
-4.5
V
Anode Current
Anode Current
40
mA
Screen Current
Screen Current
6
mA
Anode Resistance
Anode Resistance
50,000
Ω
Transconductance
Transconductance
11
mA/V
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.75
A
4
Heater
5
Anode
6
Screen Grid (g2)
7
Suppressor Grid (g3)
8
Cathode
9
Internal Shield