WH148 Carbon Film Potentiometer 3PIN B1M – KSH 40 at HIMASTORES Mombasa – best electronics in Kenya
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WH148 Carbon Film Potentiometer 3PIN B1M

SKU: HMJ1070 Category: Capacitors and resistors
KSH 40.00
Out of Stock

Product Description

WH148 Carbon Film Potentiometer 3PIN B1M

SingleGang Linear Potentiometer for HighImpedance Control Applications

The WH148 B1M is a singlegang (3pin) carbon film rotary potentiometer with a 1M ohm (1,000,000 ohms) resistance and a linear (Btaper) response curve. This compact 16mm diameter component features one independent potentiometer in a single housing, making it ideal for highimpedance audio circuits, guitar tone controls, bias adjustments, and precision single-channel applications where very high resistance values are required.

Resistance value: 1M ohms ±20% tolerance
Linear (Bcurve) taper resistance changes proportionally with rotation angle
Single-gang design with 3 pins (input, wiper, ground)
Total mechanical rotation: 300° ±5°
Ensure proper wiring identification - pin 1 (input/high), pin 2 (wiper/output), pin 3 (ground/low)
Do not exceed 200V maximum operating voltage (B-curve variants)

Technical Specifications

ParameterValue
Resistance1M ohms ±20%
TaperLinear (BCurve) resistance changes linearly
Number of Gangs1 (Single)
Number of Pins3 (1 input, 1 wiper, 1 ground)
Rated Power0.025W (B-curve)
Max Operating Voltage200V (B-curve)
Total Rotation Angle300° ±5°
Rotational Life10,000 cycles
Rotational Noise≤47mV
Shaft Diameter6mm
Shaft Length15mm (typical)
Operating Temperature-10°C to +70°C
Insulation Resistance> 100MΩ at DC500V

= Key Features =

SingleGang Design One independent potentiometer for mono or single-channel control

Linear (B) Taper - Predictable linear resistance change for precision adjustments

3Pin Configuration Simple inputwiperground connections

High Resistance Value 1M ohms ideal for highimpedance tube audio and bias circuits

Low Rotational Noise - ≤47mV ensures clean, stable signal output

Compact 16mm Form Factor - Fits standard panel mounting applications

Carbon Film Element Reliable, costeffective resistive material for general-purpose use

= Applications =

  • Guitar tone and volume controls (high-Z pickups)
  • Tube amplifier bias adjustments
  • High-impedance audio circuits
  • Sensor signal conditioning
  • Laboratory test equipment
  • Voltage divider circuits (very high impedance)
  • Industrial control panels
  • Hobbyist and DIY electronics projects
SingleGang Simplicity Easy 3-pin connection for mono applications
1M High Resistance Perfect for tube circuits and highimpedance sensors

√ Ready to use - standard 6mm shaft with nut and washer included

√ Low rotational noise - 47mV maximum for clean operation

√ 10,000 cycle durability longlasting performance

Package Includes

  1. 1x WH148 3-Pin Potentiometer (B1M)
  2. 1x Mounting Nut
  3. 1x Washer
For guitar tone control, this 1M pot works well with highimpedance singlecoil and humbucker pickups
For high-impedance voltage dividers, the 1M value ensures minimal loading on the signal source
For batterypowered highZ circuits, the 1M pot provides excellent signal transfer without excessive current draw
Identify pin functions: pin 1 input/high, pin 2 wiper/output, pin 3 = ground/low
This high resistance (1M) is preferred for tube-based audio and passive guitar circuits
Potentiometer is also known as the RV16AF series in some markets

Avoid exceeding 0.025W power rating to prevent overheating

Avoid overtightening the mounting nut- as this can damage the shaft or housing

Avoid use in lowimpedance circuits- as the high resistance may cause noise and signal degradation