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Old 23rd April 2009, 07:53 AM   #1
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Default Do we really need high priced "audio grade" power resistors?

I have some MPC 0.22 Ohm, 5 W resistors made by Fukushima Futaba. These are low inductance type resistors widely used in power amplifiers as output stage emitter resistors. I measured their and other power resistors' inductance using an Agilent LCR meter.

http://www.pansonaudio.com/Docs/Powe...easurement.pdf

Measurement results show that there is no big difference for inductance between MPC resistor and a cheap wire wound resistor. Is it worth to pay higher price for MPC resistors? Or I missed something?
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Old 23rd April 2009, 10:03 AM   #2
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Some will say yes and others will say no !
So where will that get you? Might be better to try the different types yourself as you have samples and form your own opinion.

Some have found RF oscillation in some circuits using ordinary wirewounds but many seem to have no problems. Another $64,000/- question !
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Old 23rd April 2009, 11:11 AM   #3
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Default Re: Do we really need high priced "audio grade" power resistors?

Quote:
Originally posted by panson_hk
I have some MPC 0.22 Ohm, 5 W resistors made by Fukushima Futaba. These are low inductance type resistors widely used in power amplifiers as output stage emitter resistors. I measured their and other power resistors' inductance using an Agilent LCR meter.

http://www.pansonaudio.com/Docs/Powe...easurement.pdf

Measurement results show that there is no big difference for inductance between MPC resistor and a cheap wire wound resistor. Is it worth to pay higher price for MPC resistors? Or I missed something?

John Curl's Blowtorch preamplifier

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