Author Topic: Wow.. GDT also fake exist.  (Read 1632 times)

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Offline ammjy

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Wow.. GDT also fake exist.
« on: April 12, 2017, 07:48:18 pm »

i buyed GDT 800V in Aliexpress.

after received, i found some few problems.

lead is moving. yeh.. just lead badly pressed with body. i can say it's not sealed !

if i push leads, lead easy get into seramic body.

all GDT have same problem.

without logo, only 2RM800-8 name on the body.


 

Offline metrologist

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Re: Wow.. GDT also fake exist.
« Reply #1 on: April 12, 2017, 08:07:54 pm »
At some point you'd think it would be more expensive to fabricobble a short run of garbage that looks authentic than it would to mass produce the real thing.
 

Offline james_s

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Re: Wow.. GDT also fake exist.
« Reply #2 on: April 12, 2017, 08:39:15 pm »
Sometimes I think there are people out there who just like the challenge of trying to cheat people and get away with it. Making a fake unit here means they can skip the steps involved in filling the things with gas and sealing, testing, etc. Use cheaper materials, skip the gas entirely, no expensive vacuum equipment or hermetic sealing required.

Of course it poisons the whole well eventually. I've bought a lot of parts from China over the years and most of them have been just fine. Lately I've been screwed several times and I'm close to giving up entirely. At lease the used pull  DSxxxx chips sold as new I can get a refund and hack a new battery into parts which are then free but I'd rather just know what I'm getting up front.
 

Offline TerraHertz

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Re: Wow.. GDT also fake exist.
« Reply #3 on: April 12, 2017, 08:45:22 pm »
Wow, that's amazing. I wonder if the people who 'manufactured' these even understand the difference?
Collecting old scopes, logic analyzers, and unfinished projects. http://everist.org
 

Online thm_w

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Re: Wow.. GDT also fake exist.
« Reply #4 on: April 13, 2017, 12:16:56 am »
Interesting. I see 2RM800-8 is rated 10kA.
Bourns has some in the 470V range for 47c each, but 800V is more like $1.50, not so cheap. Aliexpress is 35c each, presumably for these fakes.
Please leave a negative review so any others will know not to buy it.

Attached is real photo of what it should look like, the metal tabs on the side are not nearly as wide.

 

Offline daqq

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Re: Wow.. GDT also fake exist.
« Reply #5 on: April 13, 2017, 06:10:54 am »
Quote
Wow, that's amazing. I wonder if the people who 'manufactured' these even understand the difference?
Well, it's still gas filled, and at some point there will be a discharge, so there is no difference  ;D
Believe it or not, pointy haired people do exist!
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Offline james_s

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Re: Wow.. GDT also fake exist.
« Reply #6 on: April 13, 2017, 06:17:21 am »
Well, it's still gas filled, and at some point there will be a discharge, so there is no difference  ;D
[/quote]

Well, I'll give you the first two points anyway :)
 

Offline Gyro

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Re: Wow.. GDT also fake exist.
« Reply #7 on: April 13, 2017, 12:02:58 pm »
It's 50:50 whether it would discharge on the inside or the outside first though. My bet would be on the outside!  :palm:
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Online CatalinaWOW

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Re: Wow.. GDT also fake exist.
« Reply #8 on: April 13, 2017, 03:51:32 pm »
It's 50:50 whether it would discharge on the inside or the outside first though. My bet would be on the outside!  :palm:

I don't think it is 50:50.  Many more corona initiation points on the outside, and the few on the inside are further apart.  You are looking for suckers with that bet.
 


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