2SJ162/2SK1058 - fake or real? - Page 4

jackinnj · 29th May 2008, 09:20 PM

Ask your seller if he can provide you with this:

The 1058's are PbF and have the new computer coding.

Jack

joetama · 6th June 2008, 04:23 PM

I'm pretty sure I'm going to order my MOS-FETS from Exicon.

That whole fake transistor things scares me.

Is there one reliable source on the internet to get the 2SK1058 & J162?

jackinnj · 6th June 2008, 04:27 PM

Quote:

Originally posted by joetama

Is there one reliable source on the internet to get the 2SK1058 & J162?

Avnet has them. Sometimes Jameco will have them.

rckbrwn · 20th August 2009, 08:49 PM

The 2sk1058's are no longer available from futurlec. The qty available is zero and the link to that parts page is greyed out.

Rick

jackinnj · 20th August 2009, 11:14 PM

If you need them, I still have a few hundred.

grappay · 1st November 2010, 07:40 AM

Real ones have markings "MALAYSIA" (very small font size!!) on the ejector pin marks on the front face (where the part no is printed). You can see if you look through a magnifying lens. Weight is also very less as compared to 2SC5200 biolar.

--------------------------------
ESP P101 is very good

tmblack · 3rd June 2011, 06:14 PM

What do real ones look like? Any pictures?

Andy5112405 · 4th June 2011, 06:34 AM

Why not just TEST them.

Connect a 24V PSU across D and S with a suitable (10R for example) resistor in series with the Vcc lead.

Connect a pot across the same 24V and connect the wiper via a small (220R) resistor to the G.

With the pot adjusted to 0V, slowly increase Vg until the device starts to conduct.

If youve got a MOS-FET Igs will be virtually ZERO, measure for ZERO volts across the 220R resistor.

Keep increasing the pot until Ids starts to get close to the Ids(max) of the MOS-FET. Igs should still be virtually ZERO.

If Igs is ZERO (you definitely have a MOS-FET). If Ids can approach Ids(max) then the chances are that you have a genuine MOS-FET of the type that you are expecting.

Fakes come in many flavours. A remarked TRANSISTOR will reveal itself by Igs not being ZERO. A lesser device will simply FAIL under this test.

NOTE: Device will need to be attached to a heatsink during testing.

CHARLIEB999 · 4th June 2011, 10:39 PM

hi guys i am going abroad to africa for some considerable time and really looking forward to it but my problem is this... i have a stock of bits for Mosfet amplifers I will not be taking with me this includes some very large transformers over 2kva have 2 pairs they are extremely good quality not the usual lower quality like the "Antrim" or "ILP" more like "Avell Linberg" wrapped in doped material you know the brown stuff not use this site much is there a section where I can offer them for sale? also have a quantity of MOSFETS used but good ones old discontinued Hitachi 2SK/J 82 cannot recall full type but H-paks on sinks 32 of them plus others anyone help me here?

Amplifier tube · 13th June 2011, 03:01 PM

This is the legendary fake

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29th May 2008, 09:20 PM	#31
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	Ask your seller if he can provide you with this: The 1058's are PbF and have the new computer coding. Jack

6th June 2008, 04:23 PM	#32
joetama diyAudio Member Join Date: Feb 2008	I'm pretty sure I'm going to order my MOS-FETS from Exicon. That whole fake transistor things scares me. Is there one reliable source on the internet to get the 2SK1058 & J162?

20th August 2009, 08:49 PM	#34
rckbrwn diyAudio Member Join Date: Dec 2005 Location: Junction City, OR	The 2sk1058's are no longer available from futurlec. The qty available is zero and the link to that parts page is greyed out. Rick

20th August 2009, 11:14 PM	#35
jackinnj diyAudio Member Join Date: Apr 2002 Location: Llanddewi Brefi, NJ	If you need them, I still have a few hundred.

1st November 2010, 07:40 AM	#36
grappay diyAudio Member Join Date: Mar 2010 Location: Thrissur	Real ones have markings "MALAYSIA" (very small font size!!) on the ejector pin marks on the front face (where the part no is printed). You can see if you look through a magnifying lens. Weight is also very less as compared to 2SC5200 biolar. -------------------------------- ESP P101 is very good

3rd June 2011, 06:14 PM	#37
tmblack diyAudio Member Join Date: Jan 2005 Location: UK	What do real ones look like? Any pictures?

4th June 2011, 06:34 AM	#38
Andy5112405 Banned Join Date: Nov 2006 Location: Torpoint	Why not just TEST them. Connect a 24V PSU across D and S with a suitable (10R for example) resistor in series with the Vcc lead. Connect a pot across the same 24V and connect the wiper via a small (220R) resistor to the G. With the pot adjusted to 0V, slowly increase Vg until the device starts to conduct. If youve got a MOS-FET Igs will be virtually ZERO, measure for ZERO volts across the 220R resistor. Keep increasing the pot until Ids starts to get close to the Ids(max) of the MOS-FET. Igs should still be virtually ZERO. If Igs is ZERO (you definitely have a MOS-FET). If Ids can approach Ids(max) then the chances are that you have a genuine MOS-FET of the type that you are expecting. Fakes come in many flavours. A remarked TRANSISTOR will reveal itself by Igs not being ZERO. A lesser device will simply FAIL under this test. NOTE: Device will need to be attached to a heatsink during testing.

4th June 2011, 10:39 PM	#39
CHARLIEB999 diyAudio Member Join Date: Jan 2011	hi guys i am going abroad to africa for some considerable time and really looking forward to it but my problem is this... i have a stock of bits for Mosfet amplifers I will not be taking with me this includes some very large transformers over 2kva have 2 pairs they are extremely good quality not the usual lower quality like the "Antrim" or "ILP" more like "Avell Linberg" wrapped in doped material you know the brown stuff not use this site much is there a section where I can offer them for sale? also have a quantity of MOSFETS used but good ones old discontinued Hitachi 2SK/J 82 cannot recall full type but H-paks on sinks 32 of them plus others anyone help me here?

13th June 2011, 03:01 PM	#40
Amplifier tube diyAudio Member Join Date: Mar 2011	This is the legendary fake

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