Roender's FC-100 prototype and builder's thread - Page 43 - diyAudio
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Old 13th May 2012, 06:54 PM   #421
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Carlos, dear old friend,

the "DIY bacillus" infected me, since I have come to know you.

I am sure that you will remember my / EVETTE's versions (layouts) of your DX AMP, the DX BlameES/ST, the DX Blame MKII, ...

Mihai Rauta's "FC-100" inspired me once again to do a layout and group-buy of his AMP.

And - of course - this new AMP has to compete with your DX BlameES (this version, nothing else, that never made its way to the community, because it played like an "insane divine") ,with Michael Bittner's (my TO3) SYMASYM ...

I will give you the results of my "Shootout's Stammtisch" as soon as I will have them.

Best regards - Rudi_Ratlos

Last edited by Rudi_Ratlos; 13th May 2012 at 06:57 PM.
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Old 13th May 2012, 07:29 PM   #422
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Default These are very strong competition

I hope we can have good results...well..... i am ready to test the champion if not mine unit to see (listen) how the wonder machine sounds.

regards,

Carlos
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Old 14th May 2012, 08:05 AM   #423
Luke is offline Luke  New Zealand
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Rudi, did you buy the 3423 from the same supplier, and do they seem genuine to you? I imagine they seem wrong after testing.
I don't suppose you have any more matching boards left do you?
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Old 14th May 2012, 08:38 AM   #424
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Luke, I bought the 2SC3423 from a different supplier.
Hfe measurement with my DMM and with means of another small matching PCB shows reasonable results.

Best regards - Rudi
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Old 14th May 2012, 10:24 AM   #425
AndrewT is offline AndrewT  Scotland
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Rudi,
what results did you get that gave you reason to suspect that the devices are fakes?

Your testing jig has quite high values of resistors for testing medium power devices say around 5W to 10W.
I suggest you reduce resistor values by a factor of 10, except emitter resistor, reduce this by a factor of 100 or even remove it.

Even for To92 devices, I would be reducing by a factor of at least 2 and 20 for the emitter resistor.
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Last edited by AndrewT; 14th May 2012 at 10:26 AM.
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Old 14th May 2012, 10:35 AM   #426
lucylu is offline lucylu  England
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Default Fake 1360 ?

Started matching mine had to get more off ebay on left john
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Old 14th May 2012, 10:38 AM   #427
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If eBay is the only place you can find, it, yes then is is with 99% gurantee fake.
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Old 14th May 2012, 11:02 AM   #428
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Andrew, I will solder another test jig with reduced resistor values this afternoon and report the measurements.

I do not buy transistors from ebay!
I bought the 2SA1360 transistors from a German electronic distributor, who has a good reputation.

Best regards - Rudi_Ratlos
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Old 14th May 2012, 11:15 AM   #429
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Andrew, I sent this picture

Click the image to open in full size.

to Toshiba / Germany and asked them, if they can tell from the picture, if this is a genuine Toshiba transistor.

I received the answer a minute ago:

Click the image to open in full size.

I translate: "The 2SA1360 does not really look like a Toshiba."

Best regards - Rudi_Ratlos

P.S. Lucylu: take care!
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Old 14th May 2012, 11:20 AM   #430
Luke is offline Luke  New Zealand
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Quote:
Originally Posted by lucylu View Post
Started matching mine had to get more off ebay on left john
The one on the left looks ok I think.
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