WH148 Single Connection Dual Potentiometer for Adjustable Power Amplifier Control

This WH148 single connection dual potentiometer is a practical component for anyone building or repairing audio amplifiers, volume controls, or any circuit requiring two independent resistive tracks in one package. With a rotation angle of 300° ± 10° and a choice of 15mm or 20mm handle lengths, it fits neatly into standard panel mount applications. The dual-gang design reduces wiring complexity and saves valuable chassis space compared to using two separate potentiometers.

Construction and Electrical Specifications

Built for reliable performance in power amplifier and signal adjustment roles, this potentiometer offers a range of resistance values from B1K to B1M, with a rated voltage of 250V. The mechanical specifications ensure it can withstand normal handling and mounting forces.

Mechanical Strength

The stop strength is rated at 6.0 kgf·cm minimum, and the shaft push-pull strength is 8.0 kgf·cm minimum. This means the potentiometer will resist damage from accidental over-rotation or light pulling on the shaft during installation or use.

Detent Options

Available with centre detent, or 7, 11, 21 or 41 detent positions. The point electric torque at these detents is 50 to 150 gf·cm, providing tactile feedback for settings such as balance or tone controls that benefit from indexed positions.

Torque and Rotation

The running torque is 10 to 200 gf·cm, ensuring smooth, consistent rotation without excessive stiffness or looseness. The 300° rotation angle gives a wide adjustment range suitable for volume and tone controls.

Applications and Usage

This dual potentiometer is ideal for stereo amplifier gain controls, audio mixing desks, and any equipment requiring two channels adjusted simultaneously from a single shaft. The single connection configuration refers to the wiring style – suitable for common-ground or independent circuits.

Audio Amplifier Volume Control

Use it as a master volume control in stereo amplifiers. The dual sections track each other closely, maintaining channel balance across the rotation range. The 250V rating is sufficient for most line-level and preamplifier stages.

Test and Measurement Equipment

In function generators or power supplies, the detent version helps set precise reference levels. The 300° rotation allows fine adjustments over a wide range.

DIY Electronics Projects

Hobbyists building guitar pedals, synthesizers, or custom audio gear will find the compact size and multiple resistance options useful. The 15mm or 20mm handle suits standard knobs.

Practical Benefits

Choosing a dual potentiometer reduces component count and wiring errors. The metal shaft and bush provide secure panel mounting, and the wide resistance range means one part can serve many projects.

Space Saving

By combining two potentiometers in one body, you free up panel space for other controls or indicators. This is especially valuable in compact enclosures.

Consistent Tracking

Dual-gang potentiometers are designed so that both sections change resistance together, giving consistent stereo balance or dual-channel matching throughout the rotation.

Easy Replacement

The WH148 series is a common form factor, making it straightforward to replace in existing equipment. The handle length options (15mm or 20mm) help match original knob positioning.