Abstract: The present disclosure provides a variable attenuator for attenuating alternating signals, preferably, in a frequency band extending from approximately 10 Hz to 30 MHz. The invention utilizes a junction field-effect transistor (JFET) as a variable impedance. The low drain-to-source capacitance exhibited by the JFET allows it to be modeled as a variable resistor or potentiometer. Further, the low drain-to-source capacitance of the JFET improves the bandwidth of the attenuator. A remote DC control signal defines the resistance provided by the JFET. A feedback loop, responsive to the resistance of the JFET and the remote control signal, controls the resistance provided by the JFET in a linear manner. The DC control signal is low-pass filtered at the feedback loop to reduce any high frequency noise acquired during transmission.