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6HG5 — Beam Tetrode, B7G | Tubeofile
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6HG5
Beam Tetrode — B7G
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Known Equivalents & Substitutes
No known equivalents. If you know of any, use the ⚑ Report Issue button above.
Similar Tubes (Not Drop-In Compatible)
6AQ5
Similar B7G beam power tube — Sams lists 6AQ5A as substitute
6BM5
Similar B7G power pentode with similar output capability
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
Screen Dissipation (max)
Grid 2 Input (max)
2
W
Typical Operating
Anode Voltage (typical)
Anode Voltage (typical)
250
V
Grid 1 Bias Voltage
Grid 1 Bias Voltage
-12.5
V
Screen Voltage
Screen Voltage (typical)
250
V
Anode Current
Zero-Signal Anode Current
45
mA
Anode Resistance
Anode Resistance (approx.)
Capacitances
Grid-to-Plate Capacitance
Grid-to-Plate Capacitance
0.4
pF
Grid-to-Cathode Capacitance
Input Capacitance
8
pF
Anode-to-Cathode Capacitance
Output Capacitance
8.5
pF
output_stage
Output Power
Max Power Output
4.5
W
Heater
Heater Voltage
Heater Voltage
6.3
V
Heater Current
Heater Current
0.45
A
Notes
The 6HG5 features controlled cathode warm-up time to minimize extraneous sound during receiver warm-up. Minimum warm-up time is 14 seconds.
At Va=250V, Vg2=250V, Vg1=-12.5V: Ia=47mA, gm=4100 umhos, Rp=52kΩ, max power output 4.5W.
At Va=180V, Vg2=180V, Vg1=-8.5V: Ia=29mA, gm=3700 umhos, Rp=58kΩ, max power output 2W.
Pin Layout — B7G
1
2
3
4
5
6
7
1
Grid 1 (Control Grid)
2
Cathode
3
Heater
4
Socket-Compatible Tubes
⚠ Not electrically compatible
6AQ5
References
https://frank.pocnet.net/sheets/049/6/6HG5.pdf
https://tdsl.duncanamps.com/show.php?des=6HG5
52,000
Ω
Transconductance
Transconductance
4.1
mA/V
Heater
5
Anode
6
Grid 2 (Screen)
7
Grid 1 (Control Grid)