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Old 29th February 2016, 09:42 PM   #1
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Default fjl4215/4315 VS MJL4281/4302

Hi folks , I'm finishing two channels of the apex b500 amplifier.
originally both on this amp and on many others I have used the toshibas 2sa5200/2sc1943 pair but due to a shortage of them in my region now I am faced to use the fairchild's analogs
which are the FLJ 4215/4315, can anyone say their opinion about them , the datasheets are the same , even more the fairchild editions have higher CE voltage and higher amperage.
Will they be just as good ?

Otherwise I have to use the ON semiconductors MJL4281/4302, I have heard that they are good but they also cost bit more than twice the price for the 5200/1943, but will they sound twice as good ?

In other words I mean is it worth the additional price ?
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Old 1st March 2016, 06:10 PM   #2
akimmet is offline akimmet  United States
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ON Semi MJL3281 & MJL1302 are be a close enough match to the toshibas and may be cheaper too. I don't know of anyone having any trouble with the Fairchild devices either.
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Old 1st March 2016, 07:24 PM   #3
Welcome is offline Welcome  France
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Get the Fairchild parts. Cheaper.
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Old 1st March 2016, 07:36 PM   #4
sajti is offline sajti  Hungary
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I used many of the Fairchil FJL parts. They are as good as the original Toshibas.

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Old 2nd March 2016, 06:39 AM   #5
Welcome is offline Welcome  France
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Fairchild seems to have clones of all the old Toshiba parts, it's great. Perhaps they bought everything from them when they discontinued their entire transistors range.
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Old 2nd March 2016, 09:44 AM   #6
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So I did , I ordered the fairchild FJL's , they have a 20v higher voltage limit and 2amp higher current rating let's see how they perform.
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Old 2nd March 2016, 12:18 PM   #7
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by crazymechanic View Post
Hi folks , I'm finishing two channels of the apex b500 amplifier.
originally both on this amp and on many others I have used the toshibas 2sa5200/2sc1943 pair but due to a shortage of them in my region now I am faced to use the fairchild's analogs
which are the FLJ 4215/4315, can anyone say their opinion about them , the datasheets are the same , even more the fairchild editions have higher CE voltage and higher amperage.
Will they be just as good ?

Otherwise I have to use the ON semiconductors MJL4281/4302, I have heard that they are good but they also cost bit more than twice the price for the 5200/1943, but will they sound twice as good ?

In other words I mean is it worth the additional price ?
In general you will find that a 2pair output stage using MJL4281/4302 has a very similar SOAR to 4pair 2sa1943/c5200.
Look up the datasheets and see max Ic @ 50 to 60Vce

The double of device cost is compensated by needing half the number.
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Old 2nd March 2016, 03:45 PM   #8
akimmet is offline akimmet  United States
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Originally Posted by Welcome View Post
Fairchild seems to have clones of all the old Toshiba parts, it's great. Perhaps they bought everything from them when they discontinued their entire transistors range.
Are you sure? Although Toshiba has discontinued most of their discreet semiconductors, 2SA1943 & 2SC5200 look to still be in production for the time being. I would be more concerned of the Fairchild parts becoming immediately discontinued if the buy out by ON Semi is completed.
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Old 2nd March 2016, 09:05 PM   #9
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I would be more concerned of the Fairchild parts becoming immediately discontinued if the buy out by ON Semi is completed.
They most probably will be. The semiconductor industry seems to be hell-bent on killing the audio DIY and repair folks.
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Old 2nd March 2016, 10:52 PM   #10
mlloyd1 is offline mlloyd1  United States
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and they demonstrate an increasingly uncanny skill for it ...


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...The semiconductor industry seems to be hell-bent on killing the audio DIY and repair folks.
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