[e] 8532 와 127 비교

----------------------------------- 8532 ---------------------- 12at7 ---------

Heater Voltage ................................ 6.3 V  ....................... 6.3/12.6 V
Heater Current ................................ 0.4 A  ....................... 0.3/0.15 A
Input ............................................. 7.5 pf ....................... 2.2 pf
Output ........................................... 3.9 pf ....................... 0.5 pf
Grid to Plate ................................... 0.12 pf ...................... 1.5 pf
Plate Voltage .................................. 150 V ........................ 300 V
Plate Dissipation ............................. 2.25 W ....................... 2.5 W

Class A Amplifier
Plate Voltage .................................. 150 V ....................... 2.5 W
Grid No. 1 Voltage Derived from  
Cathode Bias Resistor ..................... 100 Ω ...................... 270 Ω
Amplification Factor .......................... 55 .......................... 60
Transconductance .......................... 12K µ ....................... 4000 µ
Plate Current .................................. 15 mA ....................... 3.7 mA

Class A Amplifier
Plate Voltage ................................... 100 V ....................... 250 V
Grid No. 1 Voltage Derived from  
Cathode Bias Resistor ..................... 100 Ω ...................... 200 Ω
Amplification Factor .......................... 55 .......................... 60
Transconductance .......................... 11K µ ....................... 5500 µ
Plate Current .................................. 10 mA ....................... 10 mA