Welcome, Guest. Please login or register.


Author Topic: Components from China (Read 3270 times)

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Components from China
« on: 2014.January.03. 11:24:07 »
The first order from China?

Offline Saint

  • EP user
  • *
  • Posts: 266
  • Country: gb
  • OS:
  • Mac OS X Mac OS X
  • Browser:
  • Safari 6.0 Safari 6.0
    • View Profile
Re: Components from China
« Reply #1 on: 2014.January.03. 12:05:44 »
The first order from China?

The very first order came through ok, but the 2nd for 20 gals has not arrived. I've ordered quite a lot from china without problems now though, so I think the last one may have got lost... or just taking a long time! So I've ordered another 20 from another supplier... but also in china, as you can't get gals cheap anywhere else. :(

Offline Z80System

  • EP addict
  • *
  • Posts: 3926
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Chrome 31.0.1650.63 Chrome 31.0.1650.63
    • View Profile
Re: Components from China
« Reply #2 on: 2014.January.03. 13:43:53 »
I just read, that NSA hijack electronic component transfers and install backdoors in those ... it will be the case, I think ... :)

We have to check those parts when they arrive ... :)
Z80 System

Offline Z80System

  • EP addict
  • *
  • Posts: 3926
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Chrome 31.0.1650.63 Chrome 31.0.1650.63
    • View Profile
Re: Components from China
« Reply #3 on: 2014.January.03. 13:48:06 »
Otherwise I had very different experiences with ordering from the east, like china or such ...

Sometimes it arrive before the time, sometimes it will not arrive, at all.

So now, I am not surprised of anything ...
Z80 System

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Re: Components from China
« Reply #4 on: 2014.January.03. 14:24:20 »
At my workplace we ordered many things from China, about 10% never arrived :-(
My personal experience about IC-s:
I ordered 10 pieces of new 20MHz CMOS Z80.
It is arrived but the CPUs are refurbished old NMOS Z80s. The top of ICs burnish and printed new fake label. The EXOS 2.4 can display the CPU type (NMOS or CMOS), all are NMOS, and don't work on 10Mhz only 4Mhz (I ordered 20MHz type!), one total dead.
Writed to seller, he sent another pack: 1 are CMOS, and working on 10Mhz, 7 also NMOS and 4Mhz, 2 dead...

Ordered new AMD AM29F040 FLASH ROMs, also burnish and printed new fake label IC-s, the real type are MACRONIX MX29F040...

Ordered WD1772 PH 02-02, also burnish and printed new fake label IC-s... real type WD1772 PH 00-02 which are can't overclock to 16MHz (HD disks handling).

If possible I order from European sellers!

Offline dolargaan

  • EP fan
  • *
  • Posts: 112
  • Country: hu
  • OS:
  • Windows XP Windows XP
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
Re: Components from China
« Reply #5 on: 2014.January.03. 20:14:45 »
In that case what does it mean: burnish

Can you attach a picture about fake IC-s?

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Re: Components from China
« Reply #6 on: 2014.January.03. 20:36:06 »
Quote from: dolargaan
In that case what does it mean: burnish
Csiszolt translated by google :oops: I hope Szipucsu know better translation.

Quote
Can you attach a picture about fake IC-s?
You can found many on the Ebay just search z84c0020pec and look at any China seller...

Offline szipucsu

  • EP addict
  • *
  • Posts: 8095
  • Country: hu
  • OS:
  • Windows XP Windows XP
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • Webnyelv.hu - Tanuljunk nyelveket!
Re: Components from China
« Reply #7 on: 2014.January.03. 20:48:36 »
Quote from: Zozosoft
Csiszolt
Maybe furbished, smoothened, polished.
Not only polishing but removing some unnecessary material from the surface, using a grinding machine or something like this. Not a common word for me. Refining the surface of some material. I hope you understand.
SOUND SOURCE 3,STYLE 16,LEFT 16,RIGHT 64,SYNC 2
SOUND SOURCE 2,STYLE 128,PITCH 25.2,SYNC 2
SOUND PITCH 25,SYNC 2
Videos

Offline dolargaan

  • EP fan
  • *
  • Posts: 112
  • Country: hu
  • OS:
  • Windows XP Windows XP
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
Re: Components from China
« Reply #8 on: 2014.January.03. 21:23:40 »
Perhaps, it seems what I have?

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Re: Components from China
« Reply #9 on: 2014.January.03. 22:16:42 »
Quote from: dolargaan
Perhaps, it seems what I have?
My 20 CPUs, and many-many an the ebay have a 0512 datecode. And now see at many seller new series with 1128 datacode.
Your CPU 0422...
a) it is real
b) older fake series :twisted:

Need more analyze.
The first suspicious sign what I see when got the cpus: the pins curved wider than all other new DIP ICs!
The second sign: look thoroughly the pins. Furbished pins, but can see the solder tin on pins especially on the inner surface.
Third: EXOS 2.4 detect as NMOS.

Offline dolargaan

  • EP fan
  • *
  • Posts: 112
  • Country: hu
  • OS:
  • Windows XP Windows XP
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
Re: Components from China
« Reply #10 on: 2014.January.03. 22:33:36 »
So, there is a little hope. :) The pins have no refurbished sight.

I will try with EXOS 2.4.   But I have to write an eprom to see. Your method  will give a 100% result?

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Re: Components from China
« Reply #11 on: 2014.January.03. 22:45:41 »
Quote from: dolargaan
Your method  will give a 100% result?
If it is detected as NMOS then 100% it is have a fake label. The C in the Z84C0020 means the CMOS type.
If it is CMOS then needed a turbo EP for check the maximum working Mhz :-)
I have a 10MHz machine, used it for test the CPUs.

Originaly I wanted the 20MHz CPU, because when I tried 12.5MHz EP then it is worked only few minutes. But I don't know this limit from my 10MHz Z80 or from other components.

Offline dolargaan

  • EP fan
  • *
  • Posts: 112
  • Country: hu
  • OS:
  • Windows XP Windows XP
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
Re: Components from China
« Reply #12 on: 2014.January.03. 23:06:06 »
Yes, I know, what C means. And this was not as "hot", like another A or B signed. 
But I have only one "turbo" EP, what is clocked with 6MHz, instead 4MHz. It's not overcloked, it is in the original specification, with some modification. :)

Online Zozosoft

  • EP addict
  • *
  • Posts: 13531
  • Country: hu
  • OS:
  • Windows 7/Server 2008 R2 Windows 7/Server 2008 R2
  • Browser:
  • Firefox 26.0 Firefox 26.0
    • View Profile
    • http://enterprise.iko.hu/
Re: Components from China
« Reply #13 on: 2014.January.03. 23:27:00 »
Quote from: dolargaan
 what is clocked with 6MHz
It is possible some of the fake 20MHz CPUs will work on 6Mhz, if the original IC are Z80B. Currently I not checked this because my 6MHz machines not have a CPU socket.
(And also possible my 3 dead CPU not dead just original 2.5MHz Z80, re-labeled as 20MHz...)

Offline lgb

  • EP addict
  • *
  • Posts: 3497
  • Country: hu
  • æðsta yfirmaður
  • OS:
  • Linux Linux
  • Browser:
  • Chrome 32.0.1700.68 Chrome 32.0.1700.68
    • View Profile
    • http://lgb.hu/
Re: Components from China
« Reply #14 on: 2014.January.04. 18:02:43 »
Quote from: Zozosoft
At my workplace we ordered many things from China, about 10% never arrived :-(
My personal experience about IC-s:

Hmm, are these stories about sellers on ebay? I have no personal experiences, but it sounds odd, and everybody told me who "play" with ebay quite often: top sellers (even from China) are quite picky about their ratings, so they want to avoid bad ratings at all price and would never fake chips etc. Then maybe this is not so true, or "bad" sellers were selected for the business?