hodgjy
Headphoneus Supremus
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- Jan 20, 2010
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I read some spec sheets, and they say the two tubes work differently in class A amplifiers.
5998:
Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 105 Ω
Amplification Factor .......................... 5.4
Plate Resistance (approx) ..................... 350 Ω
Transconductance .............................. 15.5K μ
Plate Current ................................. 100 mA
6AS7G:
Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 250 Ω
Amplification Factor .......................... 2
Plate Resistance (approx) ..................... 280 Ω
Transconductance .............................. 7000 μ
Plate Current ................................. 125 mA
Sources:
http://www.nj7p.org/Tube4.php?tube=5998
http://www.nj7p.org/Tube4.php?tube=6as7g
5998:
Class A Amplifier
Plate Voltage ................................. 110 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 105 Ω
Amplification Factor .......................... 5.4
Plate Resistance (approx) ..................... 350 Ω
Transconductance .............................. 15.5K μ
Plate Current ................................. 100 mA
6AS7G:
Class A Amplifier
Plate Voltage ................................. 135 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ....................... 250 Ω
Amplification Factor .......................... 2
Plate Resistance (approx) ..................... 280 Ω
Transconductance .............................. 7000 μ
Plate Current ................................. 125 mA
Sources:
http://www.nj7p.org/Tube4.php?tube=5998
http://www.nj7p.org/Tube4.php?tube=6as7g