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L Pad & Trimmer [message #38295] Fri, 13 September 2002 15:23 Go to next message
Zeno is currently offline  Zeno
Messages: 122
Registered: May 2009
Master
can anyone please tell me what is the different between a trimming resistor and a L pad?
Re: L Pad & Trimmer [message #38298 is a reply to message #38295] Fri, 13 September 2002 17:11 Go to previous message
Wayne Parham is currently offline  Wayne Parham
Messages: 18789
Registered: January 2001
Illuminati (33rd Degree)
Most engineers and technicians call a very small potentiometer a "trimming resistor." They are usually 1/4 watt or 1/8 watt units, come in a variety of resitance ranges and they come in 20 turn versions as well, for very fine adjustments. L-Pads are usually rather large, like 10 watt or larger, and they are usually for low impedance circuits, having a low resistance range. They use series/parallel values that are designed to match the total load impedance to what it would have been without the pad. Other than that, they're basically the same thing - a resistor voltage divider.
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