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Old 9th March 2013, 03:28 PM   #1
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Default does a single pair of IRFP240 9240 needs source resistors?

does a single pair of IRFP240 9240 requires a source resistor? since we dont have any current sharing at the output and I observe the absence of the source resistor even in Hiraga amplifier. I think there could be little sonic improvement if the source resistor is eliminated as its in the path...
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Old 9th March 2013, 07:31 PM   #2
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I presume one is in halogen light switch in Vancouver , and another one is used as cigaret paper weight , in NY ?

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Old 10th March 2013, 03:25 AM   #3
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I had assumed they were for making feedback 'work better' and also protect transistors from a short (help me...)
Adcom GFA-5200 has that transistor complement and it has 0.1R, and I replaced with 0.07R. Next time I would use 0.05 as it makes the math work out better while setting the bias current.

ZM, what does that mean?
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Old 10th March 2013, 03:37 AM   #4
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that means that without context , there is no good answer

what is intended aplication - whjich amp exactly ?

in some Rs is mandatory , in some isn't
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