tube amp calculator

Common Tube Amp Calculations

Voltage from Current and Resistance	Power from Current and Impedence	Plate Current for % Plate Dissipation
Current from Voltage and Resistance	Power from Voltage and Impedence	Plate Current & Power from Volts across OT
Resistance from Voltage and Current	Power from Voltage and Current	Plate & Screen Current from Cathode Voltage
Output Transformer Primary Impedence Calculation	Bleeder Resistor Calculator Calculation	Bias Current Calulation 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 A	Class AB	High AB
Tube Type:	EL84EL346L6 / 58816550/ KT886V6	EL84EL346L6 / 58816550/ KT886V6	EL84EL346L6 / 58816550/ KT886V6
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

Bleeder Resistor Calcs

Supply Voltage: Volts DC
Capacitor value: microFarads
Resistor value: in Kilo Ohms

Time	Volts	Watts
100ms
500ms
1 Sec
2 Sec
5 Sec
10 Sec
15 Sec
20 Sec
30 Sec