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8GK6 — Power Pentode, Compactron | Tubeofile
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8GK6
Power Pentode — Compactron
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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
Known Equivalents & Substitutes
16GK6
29GK6
Similar Tubes (Not Drop-In Compatible)
EL84
Similar power pentode but Noval base and 6.3 V heater — not pin-compatible
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)
200
V
Notes
8.4 V / 0.45 A series heater for series-string operation in AC/DC TV receivers.
Brans Vademecum lists extensive equivalents in the EL84/6BQ5 family, but most are NOT pin-compatible due to different bases.
16GK6 and 29GK6 are heater voltage variants (16.8 V and 29.4 V respectively) with the same Compactron base.
Pin Layout — Compactron
1
2
3
4
5
6
7
8
9
10
11
12
1
No Connection
2
References
https://tdsl.duncanamps.com/show.php?des=8GK6
https://www.radiomuseum.org/tubes/?tube=8GK6
Screen Voltage (typical)
Screen Voltage (typical)
200
V
Grid 1 Bias Voltage
Grid 1 Bias Voltage
-7.3
V
Anode Current
Anode Current
36
mA
Anode Resistance
Internal Plate Resistance
38,000
Ω
Transconductance
Transconductance
10
mA/V
Output
Output Power
Output Power (Class A SE)
4.6
W
Heater
Heater Voltage
Heater Voltage
8.4
V
Heater Current
Heater Current
0.45
A
Cathode
3
Control Grid
4
No Connection
5
Heater
6
Heater
7
Anode
8
No Connection
9
Screen Grid
10
Internal Shield
11
No Connection
12
No Connection