2SC5200/2SA1943 Toshiba or Fairchild - Page 2 - diyAudio
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Old 28th May 2009, 07:56 PM   #11
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Rob_S,
there can be a significant difference.
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Old 29th May 2009, 10:56 PM   #12
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Rob_S,
Toshiba and some other Japanese companies have developed transistors for audio for decades. Amplification and switching require different characteristics. Dependable fabrication is equally important.
If you have higher expectations on quality, consider 2SC2837/2SA1186.
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Old 30th May 2009, 03:29 AM   #13
burbeck is offline burbeck  United Kingdom
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profusion in the uk are a very good supplier of the Toshiba part
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Old 30th May 2009, 12:22 PM   #14
sajti is offline sajti  Hungary
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I use Fairchild FJL4215/4315 (same az 2SC5200/2SA1943). The O group is quite good. High Hfe, fast, and reliable. I have 40pairs of them, and I have no problem with them. I get them from Farnell. The only reason why I will go to use NJWx281/x302 is the size, and the price.

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Old 30th May 2009, 12:53 PM   #15
jaycee is offline jaycee  United Kingdom
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Quote:
Originally posted by burbeck
profusion in the uk are a very good supplier of the Toshiba part
Profusion don't claim to supply the Toshiba ones, although they do link to their data sheet. From what I've heard, Profusion supply clones made by Semelab, also sold as Magnatec by Farnell and others.
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Old 30th May 2009, 01:41 PM   #16
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Hi,
the specifications of 2SC5200/2SA1943 are valid if manufactured by Toshiba. If not, you have got something else.
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Old 30th May 2009, 03:27 PM   #17
tinitus is offline tinitus  Europe
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Quote:
Originally posted by jaycee


Profusion don't claim to supply the Toshiba ones, although they do link to their data sheet. From what I've heard, Profusion supply clones made by Semelab, also sold as Magnatec by Farnell and others.

Good to have that in the clear

They only mention manufactor as "other"
But hard to image they would sell fakes that doesnt work at all
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Old 30th May 2009, 08:51 PM   #18
tinitus is offline tinitus  Europe
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Do they test them before reselling

Reason I ask is
What if some manufactor finds that its much cheaper and more profitable to just buy cheap parts instead of manufactore them

And the resellers closest to us may even not know what they are selling
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Old 2nd June 2009, 01:14 AM   #19
Bigun is offline Bigun  Canada
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Well I got my sound from the Fairchild devices. I like them, have no complaints. The sound I heard was really very nice indeed. Probably not scientific enough for you guys but unless there is a specific concern I would see no reason not to use them. The only downside I can see is if you don't like TO-220 packages. The power rating is lower, leads closer together, metal tab means using shoulder washers or nylon bolts (not sure what you guys think about nylon, but they're available at my local hardware store). Specifications are available from Fairchild.
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Old 2nd June 2009, 01:50 AM   #20
jaycee is offline jaycee  United Kingdom
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The cool thing about the Fairchild devices is that they supply that range of devices as TO-264, TO-3P and then TO-220 for drivers. They also have SPICE models for all the devices that work well.

They also sell direct, and are OK with hobbyist orders, so you're guaranteed no fakes.

So, with KSA992/KSC1845, KSA1381/KSC3503, and then these babies, they have pretty much everything needed for a great power amp KSA1220/KSC2690 also look good as 649/669 type driver replacements.
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