Author Topic: Vintage Parts from China  (Read 7620 times)

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Offline COSMOS2K

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Re: Vintage Parts from China
« Reply #50 on: June 15, 2018, 11:54:25 am »
Hello wraper:

Thanks for the reply.

Right, that's the answer, it's the sad reality. I will not buy again in UTsource, the equipment I repair is too important to play with false CHINESE conponents.

Greetings.

 

Offline dj831

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Re: Vintage Parts from China
« Reply #51 on: November 08, 2019, 08:10:45 am »
My two cents on UTSource (and sorry to 'resurrect' a very old topic  ;)).

I purchased Toshiba RAMs, TC551001BFTL (I'm redesigning a DS1486 for my Tek scope). Just before soldering it, I saw that there was something strange with marking dot - have a look at the pictures below, they speak for themselves (UTSource RAM vs close-up of the genuine RAM soldered in a TI-92...).
Ah, while we are, that Toshiba RAM is supposed to be vintage, but has a datecode of 1537  :-DD

So, for me, best way to get genuine parts is to salvage an item containing the part needed. You get more 'chances' to purchase a fake than to desold an IC that is dead.
 

Offline james_s

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Re: Vintage Parts from China
« Reply #52 on: November 08, 2019, 08:38:34 pm »
Even in the picture it looks like it may be blacktopped. Did you test it to see if it's actually a RAM?
 

Offline marcopolo

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Re: Vintage Parts from China
« Reply #53 on: November 08, 2019, 09:48:49 pm »
Hi,

I confirm UTSource isn't a reliable supplier and sell a lot of fakes.
One example MOTOROLA MC6820 (retired in 1976)

[attach=1]


Offline tooki

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Re: Vintage Parts from China
« Reply #54 on: November 09, 2019, 11:27:23 am »
My two cents on UTSource (and sorry to 'resurrect' a very old topic  ;)).

I purchased Toshiba RAMs, TC551001BFTL (I'm redesigning a DS1486 for my Tek scope). Just before soldering it, I saw that there was something strange with marking dot - have a look at the pictures below, they speak for themselves (UTSource RAM vs close-up of the genuine RAM soldered in a TI-92...).
Ah, while we are, that Toshiba RAM is supposed to be vintage, but has a datecode of 1537  :-DD

So, for me, best way to get genuine parts is to salvage an item containing the part needed. You get more 'chances' to purchase a fake than to desold an IC that is dead.
Did you intend to attach more than one image?
 

Offline testpoint1

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Re: Vintage Parts from China
« Reply #55 on: November 12, 2019, 05:35:46 am »
if that is popular, just like RF amp transistor, most of them are fake, if that is rare, you can buy several to select it, since they are from rubbish PCB board using high temperature.
 

Offline COSMOS2K

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Re: Vintage Parts from China
« Reply #56 on: November 19, 2019, 07:26:19 pm »
Hi:

I have investigated a little through contacts especially near China, and they have told me that they falsify and highlight relatively expensive and difficult to find components, and especially those that are already of a certain age, as is my case with the 1200MHz RF module , old RF transistors and integrated circuits within this segment, so be careful, if the equipment to be repaired is important or high-end I do not recommend Utsource as a seller.
I prefer to buy some on Ebay for parts and get what I need.

Regards.
 

Offline Rasz

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Re: Vintage Parts from China
« Reply #57 on: November 20, 2019, 02:40:17 pm »
The weirdest one for me is "refreshing" genuine parts by grinding tops off and printing same part number with ridiculous date code, like 6510 made in 2015 etc

example


spoiler, those are real working parts
Code: [Select]
https://www.youtube.com/watch?v=2OMMHwY5V5k
[url]https://www.youtube.com/watch?v=l3RWOZX58A8[/url]
Ps: its really hard to post YT links and not get them embedded
« Last Edit: November 20, 2019, 02:42:36 pm by Rasz »
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