Fake MJ15024 BEWARE! - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd May 2012, 04:03 AM   #1
diyAudio Member
 
Join Date: Aug 2010
Default Fake MJ15024 BEWARE!

I've heard of counterfeits and knock off's, but this takes the cake in my book. I ordered 6) MJ15024's & 6) MJ15025's out of Vancouver. Two of each pr went into a Marantz receiver I had on the bench. One channel WAS working before I got started. I replaced both channel's outputs as a matter of course. On pwr up test, (variac) BOTH channels had a dead short! To my dismay, I discovered BOTH MJ15024's where dead shorted, they measured like there was no junction (die) in the casing. Hmm. I checked the other 4 and found 2 more dead ones, so out of 6, 4 where dead! I let my parts guy know and he sent me 4 more with many sorries. I tested them and 2 out of the 4 where dead!
I couldn't help it,, I cut the tops off the orig and the MJ. Have a look and tell me which one you'd rather have in your amp!
I'll post the pic's as soon as I figure out how to.

Cheers, Al
  Reply With Quote
Old 22nd May 2012, 04:54 AM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Go to post reply, advanced mode, manage attachments, and post your pix.

Sorry to hear about the bad parts, counterfeit semiconductors and electrolytic caps have become a really big problem.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 22nd May 2012, 07:48 AM   #3
Enzo is offline Enzo  United States
diyAudio Member
 
Join Date: Sep 2004
Location: Lansing, Michigan
I only buy transistors from places like Mouser or Allied for that reason. I read about people buying parts on ebay and I just shudder.
  Reply With Quote
Old 22nd May 2012, 04:06 PM   #4
diyAudio Member
 
Join Date: Aug 2010
Here are my Pic's
Attached Images
File Type: jpg PIC_0353.JPG (251.1 KB, 342 views)
File Type: jpg PIC_0355.JPG (254.6 KB, 322 views)
  Reply With Quote
Old 22nd May 2012, 04:22 PM   #5
Banned
 
Join Date: Apr 2012
Leam123,

thanks for the head's up,

I've fixed this for better viewing..

Click the image to open in full size.

Click the image to open in full size.
  Reply With Quote
Old 26th May 2012, 05:01 AM   #6
diyAudio Member
 
Join Date: Dec 2010
ebay is not the best place unless you know who your buying from,Like Cliff jack USA is made in China,and when I asked they about Cliff UK they said they where not around anymore and that Cliff USA was better..... NOT!!!
  Reply With Quote
Old 8th June 2012, 05:48 AM   #7
diyAudio Member
 
djmiddelkoop's Avatar
 
Join Date: Feb 2003
Location: Noord-Holland
Check this :

Counterfeit Transistors

and this one has even more, only it's in Spanish :

Transistores falsificados
__________________
“Information is not knowledge.Knowledge is not wisdom.
Wisdom is not truth.Truth is not beauty.Beauty is not love.Love is not music.Music is THE BEST.”
  Reply With Quote
Old 3rd July 2012, 11:22 AM   #8
diyAudio Member
 
Join Date: Sep 2011
Could any one tell me that is this real or fake plz.

Click the image to open in full size.Click the image to open in full size.Click the image to open in full size.
  Reply With Quote
Old 3rd July 2012, 12:22 PM   #9
diyAudio Member
 
Join Date: Dec 2010
They're from RS Components and are marked according to the datasheet.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
WTB MJ15024/25 imix500 Swap Meet 0 23rd June 2011 01:57 AM
MJ15024/5 measured Cbe? metal Parts 3 31st March 2011 10:43 AM
Mj15003 And Mj15024 Pbassred Solid State 3 15th November 2003 01:18 PM
Beware!!!!! Fake Sankens mcp Solid State 14 30th May 2003 07:25 PM


New To Site? Need Help?

All times are GMT. The time now is 08:12 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2