29.3.08

tube amp calculator

this web-based calculator I created comes in handy for doing common tube amp calculations

email me for a cleaner HTML copy. Blogger doesn't like this html much!





Common Tube Amp Calculations (Scroll Down For Index)

































Voltage from Current and ResistancePower from Current and ImpedancePlate Current for % Plate Dissipation
Current from Voltage and ResistancePower from Voltage and ImpedencePlate Current and amp Power from Volts across OT
Resistance from Voltage and CurrentPower from Voltage and CurrentPlate & Screen Current from Cathode Voltage
Output Transformer Primary Impedance CalculationBias Current Calculation from Torres Book


























































Voltage from Current
and Resistance



Current: mA

Resistance: Ohms


Voltage Volts






























































Current
from Voltage and Resistance

Voltage: Volts

Resistance: Ohms



Current mA




























































Resistance
from Voltage and Current



Voltage:

Current: mA


Resistance Ohms





























































Power
from Voltage and Current

Voltage: Volts

Current: mA


Dissipation Watts




























































Power
from Voltage and Impedence



Voltage: Volts

Impedence: ohms


Dissipation Watts


























































Power
from Current and Impedence

Current: mA

Impedence: ohms


Dissipation Watts






















































Plate
Current for Percentage of Plate Dissipation at Idle


Max Plate Dissipation: Watts

Desired Percent Plate Dissipation at Idle: %

Plate Voltage: Volts


Bias Current mA

























































Plate
Current / Power from Voltage Across Output Transformer Primaries

Primary
Winding DC Resitance (Measure with Amp OFF!)

Winding 1: ohms

Winding 2: ohms

Voltage Across Primary Windings at Idle (Amp on, Zero Volume)

Winding 1: Volts

Winding 2: Volts

Output Transformer Center Tap Voltage: Volts


Winding 1: Current mA Power Watts

Winding 2: Current mA Power Watts




























































Plate
and Screen Current from Cathode Voltage and Screen Resistor



Cathode Resistor: Ohms

Cathode Voltage: Volts

Screen Resistor: Ohms

Voltage Across Screen Resistor:Volts


Plate Current mA

Screen Current mA


























































Bias
Current Calculation From Torres Book










































Class AClass ABHigh AB
Tube Type:
Plate Volts:
Calculate



Bias Current mA













































































Output
Transformer Primary Impedence Calculation
Set
Signal Generator for 1KHz at about 1VAC

Generator Output:VAC

Volts across secondary: VAC

Secondary Tap Value / Speaker ImpedenceOhms



Turns Ratio

Primary Impedence Ohms










































































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