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Old 29th January 2011, 10:06 PM   #51
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What kind of heat can the SS devices tske compared to IRFP, and is it significant enough to provide advantages simply from a bias standpoint?
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Old 30th January 2011, 04:22 AM   #52
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Quote:
Originally Posted by buzzforb View Post
What kind of heat can the SS devices tske compared to IRFP,....
much greater , but that's irrelevant here

Quote:
Originally Posted by buzzforb View Post
...and is it significant enough to provide advantages simply from a bias standpoint?

clarify question
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Old 30th January 2011, 04:27 AM   #53
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clarify question
I thought i read somewhere that a higher bias sounds better. Problem is, it creates more heat. IRFP's can only take so much, so bias is limited unless using more devices. More devices, more noise. Device that can take more heat allows higher bias with fewer devices and less noise. This is a very uneducated answer, if not already apparent.
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Old 30th January 2011, 04:40 AM   #54
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several times here is written that practical limit for mosfets is around 50W , if you use more powerful ones - IRFP150N per instance ;

there is no reason to torture other device in same package with more , even if that device is capable of taking more .

first important thing which is often neglected , in making any Papamp , is - one is making amp with original price above 2 or even 3K$ ( still bargain for that quality !) ....... and why skimping few $ , doing that ?

btw. "more devices - more noise " is wrong assumption
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Old 28th April 2011, 09:27 PM   #55
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Did you get any further with this?
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Old 28th April 2011, 10:57 PM   #56
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I have yet to purchase the SS fets, but if I got them, it is pretty much just a matter of dropping them in to the lower half.
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Old 6th May 2011, 03:16 PM   #57
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It's said that these FET's sound better at higher bias. Is this because we're operating them in a Vgs region that's more linear? Maybe because of a linearity that comes with increasing junction temperature? If there's no vague answer, then how about specifically the SS R100?
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Old 6th May 2011, 05:31 PM   #58
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More specifically, they tend to measure less distortion at higher bias. That
is often interpreted as "sounds better"

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Old 27th February 2014, 05:43 PM   #59
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Default Matched Quad of SS R100 for sale

the matched quad is from a group buy of tea-bag.

I do not have the time for building an amp with

Not used and stored in static foam

Diy'er with interest , please send me a pm.

Regards Sam
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Old 28th February 2014, 07:53 AM   #60
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