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Where to buy good quality resistors in SA
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<blockquote data-quote="handsome" data-source="post: 1168899" data-attributes="member: 772"><p>The white sandcast things everyone poo-poos are wirewound resistors which are quieter than film resistors (no excess noise) - you can find better looking wirewounds at RS Components - nice green vitreous enamel clad thingies or sexy gold heatsinked ones - but you are just paying for the looks. They are no more noisier than the white jobbies. The only non-inductive wirewounds I know of are the Mills resistors but you’ll pay dearly for those. Locally, you can or could) find thick-film power resistors, these are entirely non-inductive but may be noisier (excess noise again) than wirewounds. Excess noise is a result of composition so wire or foil have none whilst films do. Wirewound resistors’ values can change with age - the tightly wound wire will loosen slightly due to temperature changes in use - basically the metal will expand and contract with temprature slightly changing their initial tightness. The solution is to heat your wirewounds in an oven at approximately 100 degrees for about 12 hours to “pre-age” them. Due to their composition all wirewounds are equivalent. Mills resistors are wound differently (the Ayerton-Perry method) to cancel the inductance.</p></blockquote><p></p>
[QUOTE="handsome, post: 1168899, member: 772"] The white sandcast things everyone poo-poos are wirewound resistors which are quieter than film resistors (no excess noise) - you can find better looking wirewounds at RS Components - nice green vitreous enamel clad thingies or sexy gold heatsinked ones - but you are just paying for the looks. They are no more noisier than the white jobbies. The only non-inductive wirewounds I know of are the Mills resistors but you’ll pay dearly for those. Locally, you can or could) find thick-film power resistors, these are entirely non-inductive but may be noisier (excess noise again) than wirewounds. Excess noise is a result of composition so wire or foil have none whilst films do. Wirewound resistors’ values can change with age - the tightly wound wire will loosen slightly due to temperature changes in use - basically the metal will expand and contract with temprature slightly changing their initial tightness. The solution is to heat your wirewounds in an oven at approximately 100 degrees for about 12 hours to “pre-age” them. Due to their composition all wirewounds are equivalent. Mills resistors are wound differently (the Ayerton-Perry method) to cancel the inductance. [/QUOTE]
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Where to buy good quality resistors in SA
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