Product Overview
Vernitron 121 Rectilinear Potentiometer 40K Ohm – Unused, New Old Stock
The Vernitron Model 121 is a rectilinear potentiometer engineered for precise single-axis position sensing and resistance-based feedback.
These NOS Vernitron units come from an era when linear potentiometer assemblies were built for reliability across industrial controls and audio systems, giving this component a place in both instrumentation and studio gear.
Product Condition
Unused, new old stock. Clean and well-preserved with no signs of prior installation. Mechanical travel is smooth, and the housing shows minimal handling from long-term storage.
Product Overview
This potentiometer offers a 40K ohm resistance value with approximately 1.5 inches of linear travel. It functions by varying circuit resistance through the movement of its wiper along a defined path, making it suitable for voltage drop measurements, displacement sensing, and manual control tasks. The design supports accurate response in both low-level signal work and higher-resistance circuits. Its straightforward integration and predictable characteristics make it a stable choice for measurement and control applications.
Key Features
- Vernitron Model 121 rectilinear potentiometer
- 40K ohm total resistance
- Approximately 1.5 inch mechanical travel
- Linear position-sensing operation with wiper movement
- Part Number 80474-3
- Suitable for voltage drop and displacement measurement
- Compatible with analog control circuits
- Robust housing for stable alignment and smooth actuation
- Easy integration into custom assemblies or instrument panels
Applications
- Single-axis displacement measurement
- Audio level control in mixing consoles
- Automation feedback for linear motion
- Voltage drop measurement in analog circuits
- Prototyping for electronic instrumentation
- Educational and laboratory projects requiring linear sensing
- Retrofit or repair of vintage control equipment
Frequently Asked Questions
What differentiates the Model 121 from other linear potentiometers?
Its 40K ohm rating and 1.5 inch travel provide a balance of high resistance and compact movement useful for precision control and measurement circuits.
Is this suitable for audio equipment?
Yes. These potentiometers have long been used in mixing consoles and other audio gear for accurate level control and smooth linear response.
Does the unit require special mounting?
It mounts like traditional rectilinear potentiometers and can be panel-mounted or integrated into custom mechanical assemblies.
Can it be used for displacement sensing?
Yes. The component is designed for linear position measurement where resistance changes proportionally to wiper travel.
Does NOS condition affect performance?
The unit is unused and clean. Components of this type typically retain expected electrical and mechanical characteristics when stored properly.
Vernitron built these rectilinear sensors to serve in labs, consoles, and control panels, and this NOS piece carries that legacy forward with its straightforward accuracy. Once installed in your system, it continues the work it was engineered to do.
