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Matching resistors to 1% or Better
Matching resistors to 1% or Better
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Old 29th August 2006, 07:25 PM   #1
kopite is offline kopite  New Zealand
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Default Matching resistors to 1% or Better

What is the best way to do this? I'm starting to build the Red light amp.
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Old 29th August 2006, 07:29 PM   #2
Stocker is offline Stocker  United States
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The easiest way is to purchase resistors with low tolerance

The next easiest is with a high-resolution ohmmeter

Lacking that, a current measurement setup with a low voltage supply...
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Old 29th August 2006, 07:36 PM   #3
AKN is online now AKN  Sweden
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If it's low ohm resistors compaired to input resistanse of a voltage meter maybe this can be a solution:
/ Anders
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Old 29th August 2006, 08:11 PM   #4
HFGuy is offline HFGuy  Canada
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Just buy them. High tolerance resistors are common place these days with it not being uncommon to see 0.1% resistors. But ask yourself first how much tolerance do i really need ? 1% is more then accurate for most applications. Only time you really need uber high tolerance in resistors is for DACs and those are laser etched.
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Old 29th August 2006, 08:21 PM   #5
jackinnj is offline jackinnj  United States
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Matching resistors to 1% or Better
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Old 29th August 2006, 09:58 PM   #6
Brian Beck is offline Brian Beck  United States
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I agree with HFGuy. Just buy them. 1% metal film resistors have gotten so cheap and common these days that there's hardly any reason to buy any other kind of low power resistor. Some people swear by (or at) carbon comp resistors for grid stoppers. But I have used films successfully there too. For power resistors, precision wirewound resistors become the best choice, but the price grows.
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