T-Pad / H-Pad Calculator
Resistor Values for Attenuation

T-Pad & H-Pad Circuits

Input field
Enter the impedance of the source device feeding the input of the Pad circuit.

Output field
Enter the nominal impedance of the destination device you will be feeding audio to.

Attenuation field
Enter the desired attenuation needed in dB, up to, but not beyond 40.

Required Data Entry (Default Values Below Usually Work Well For Line to Mic Attenuation)
Input Impedance (Source impedance) (600 ohms for modern rigs)	Ohms
Output Impedance (Destination impedance) (600 ohms for modern rigs)	Ohms
Required Attenuation In DB (1 to 40) (Line to Mic is Typically -40dB)	DB

Calculated Results T-Pad (Unbalanced)
Input Resistance (R1)	Ohms
Output Resistance (R3)	Ohms
Bridge Power Load Resistance (R2)	Ohms
Based On Input Impedance Of	Ohms
Based On Output Impedance Of	Ohms
Calculated Results H-Pad (Balanced)
Input Primary Resistance (R1/2)	Ohms
Output Primary Resistance (R3/2)	Ohms
Input Secondary Resistance (R1/2)	Ohms
Output Secondary Resistance (R3/2)	Ohms
Bridge Power Load Resistance (R2)	Ohms
Based On Input Impedance Of	Ohms
Based On Output Impedance Of	Ohms

T-Pad / H-Pad Calculator Resistor Values for Attenuation

T-Pad / H-Pad Calculator
Resistor Values for Attenuation