12AZ7

$15.00

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Never heard of these? Well I got them because they are allegedly a substitute for the 12BH7 - they have a higher plate dissipation than the 12AX7 (2.4w as opposed to 1.2W) at a lower maximum voltage (300v as opposed to 330v):

Direct Interelectrode Capacitances (approx)

Each Triode
Input .........................................    3.1 pf
Output ........................................ 0.45 pf
Grid to Plate ................................. 1.9 pf

Maximum Ratings (Design Center Values)

Each Triode
Plate Voltage .................................  300 V
Plate Dissipation ............................. 2.5 W

Class A Amplifier
Plate Voltage .................................   250 V
Grid No. 1 Voltage Derived from
Cathode Bias Resistor ...................... 200 Ω
Amplification Factor .......................... 60
Plate Resistance (approx) ................  10.9K Ω
Transconductance ............................ 5500 µMoh
Plate Current .................................   10 mA

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