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Laboratory Resistor Applications

The Laboratory Resistor – Invaluable In Many Applications
The laboratory resistor (also referred to a a slider resistor) has been used for a convenient way to achieve and easily adjustable power resistance for over 50 years. Whereas a wire wound potentiometer offers a variable power resistor via a rotary form of adjustment, the laboratory resistor offers a way of adjusting the resistance via a linear form of resistance.

Many educational institutions such as universities, technical colleges and high schools use laboratory resistors in their electrical and electronics courses as they allow students to easily and accurately set a specific resistance value via the sliding […]

July 23rd, 2014|Power Resistor, Resistor Applications, resistor theory|
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Wirewound Resistors – Basic Resistor Principles

Understanding Critical Parameters In Resistor Selection – Ohms Law
Going back to college fundamental physics is helpful in understanding the most commonly used parameters used in specifying wirewound and power resistors. Good engineering practice will generally mean that a certain degree of ‘over specifying’ will result in long term reliability and performance of the final product – be it a motor control circuit, power supply, resistor bank, heating or cooling appliances or printed circuit board control circuitry.

Resistance – Ohms Law

Ohms law is possibly the most fundamental equation taught in electrical engineering. It is the foundation principle used to determine the relationship […]

June 17th, 2014|metal clad resistors, Power Resistor, resistor theory, Wire Wound Resistors, wirewound resistor selection|
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Wire Wound Potentiometer Reliability

Wire Wound Potentiometer Reliability
Potentiometers have been used in electronic circuitry since the early 1900’s. The mass production of valve radio’s in the 1920’s lead to a demand for reliable, cost effective variable resistors for applications such as tone controls and volume controls. Carbon potentiometers were often used as the resistive material(and still are) for low wattage applications. The potentiometer ‘wiper’ – the moving ‘arm’ that connects to one of the potentiometers terminal was often the cause of unreliable operation in early manufacturing operations of potentiometers. The wiper must make an effective and highly reliable contact with the resistance element during […]

May 27th, 2014|wire wound potentiometer|
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Rheostat Used In Remote Irrigation Project

The APR series of rheostat has a long history of reliable operation in many applications requiring a rugged, easily mounted rheostat that can offer variable resistance adjustment and high power ratings. Selecting the appropriate rheostat is a matter of determining the power that has to be ‘dropped’ across the rheostat winding and the required resistance of the rheostat.

Available Rheostat Power Ratings

The APR series has 5 available power ratings giving engineers flexibility in selecting the most appropriate rating for their product or design. These ratings available are 25 watt, 50 watt, 150 watt, 300 watt and 500 watt. Power dissipation of the […]

May 7th, 2014|Rheostat|
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Panel Mount Resistors

The addition of aluminium housed resistors to our range of resistors means that our customers have an increased option when it comes to resistor selection for their application.

Terminology: Panel mount resistors are also referred to in the electronics industry as ‘panel mount resistors’ and ‘aluminium housed resistors’.

Applications; This style of wire wound resistor is used where a small physical size is required (relative to the power rating of the resistor) and a rugged construction of the resistor is required.

Mounting And Heat Sinking: The aluminium housed resistors are typically mounted on a suitable heat sink material by way of the mounting […]

April 7th, 2014|metal clad resistors, Resistor Applications|
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5 Watt Wire Wound Potentiometer

We have had several enquiries for a 5 watt rated wire wound potentiometer for applications ranging from motor control, light dimming, audio equipment and industrial controls. The standard AW potentiometer is rated at 3 watts but can be used in a 5 watt application. The way we achieve a 5 watt rated wire wound potentiometer is to use a dual gang AW potentiomer with the terminals paralleled up to achieve the higher wattage rating required.
Available Resistance Range
Because the AW potentiometer has a resistance range from 1 ohm to 50k ohms (with a linear taper) when the dual gangs are connected in […]

March 11th, 2014|wire wound potentiometer|
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ASW Series Precision Resistor Used In Linear power Supply

The ASW 5 precision wire wound resistor is rated at 6.5 watts and has been used throughout the Australian electronics manufacturing sector for 30 plus years. This series of resistor has been used in many applications where tight tolerance, high inrush of current and long term reliability of operation are required.
400 Watt Linear Power Supply Application
A recent use for this resistor has been in a locally designed 400 watt linear power supply. The trend in power supply design over the last 15 years has been more towards switch mode technology as high efficiency power supply operation is possible and minimal […]

February 19th, 2014|Applications, Precision Wire Wound Resistor|
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Wire Wound Resistors – Manufacturing In Australia

The Australian manufacturing industry has gone through significant changes over the last 25 years and the electronics manufacturing sector is no different. In an increasingly competitive, price driven manufacturing world, the Australian electronics industry has followed many other industries looking to reduce costs, to move part or all of their electronic manufacturing overseas, notably to China.

This trend to Chinese based manufacturing started in the mid 1980’s and China was seen as a way of slashing manufacturing costs for some Australian companies. Whilst this trend continued for the next 20 years or so, recently we have witnessed a move back to […]

January 19th, 2014|Wire Wound Resistors|
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Power Resistors – Light Rail Braking Load Bank

Power Resistor Range And Specifications
There are many applications for a power resistor where a very substantial power rating is required that exceeds the wattage available from our range of power resistors. The current range of power resistors covers a range from power ratings from 5 watts to 1000 watts.

The corresponding ceramic former lengths range from, for example, 51mm for the DG series resistor rated at 20 watts, to 165mm for the HA series 100 watt resistor up to the YM type power resistor that has a 1Kwatt rating and has a ceramic length of 475mm.

There are numerous applications where a […]

January 16th, 2014|Power Resistor|
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Wire Wound Potentiometer For Audio Applications

Wire wound potentiometers have been used widely within the audio visual industry as a superior alternative to carbon based potentiometers for many years. Carbon potentiometers can exhibit the following negative qualities particularly in audio applications:

Carbon potentiometers can be ‘noisy’ electrically. As the carbon elements within the potentiometers age they can begin to generate electrical noise which, when amplified for example, can result in an inferior sound quality audio applications
Potential for failure in higher power applications. Carbon ‘pots’ generally have a lower wattage rating than their wire wound counterparts. This is often the case in high end audio applications employing vacuum […]

December 7th, 2013|Applications, wire wound potentiometer|
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