Counterfeit? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 24th September 2005, 09:53 AM   #1
diyAudio Member
 
Join Date: May 2005
Location: -
Question Counterfeit?

Hello guys,

Recently i bought some of this transistors. Are these counterfeit?

Greetings
Attached Images
File Type: jpg counterfeit.jpg (17.0 KB, 404 views)
  Reply With Quote
Old 24th September 2005, 10:11 AM   #2
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Nobody can tell from a simple picture like that. I suggest you have a look at Rod Elliot's ESP site and the counterfeit section.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 24th September 2005, 01:04 PM   #3
tlf9999 is offline tlf9999  United States
Account Disabled
 
Join Date: May 2005
Location: none
I am just curious about this. I have been buying electronic parts for quite sometimes (over 30 years) and have yet to encounter a counterfeit (knock on wood).

Just from this forum, it seems to me that the problem of counterfeit seems to be much more so in Europe and Asia (I live in the US).

I wanted to know if that is typical and if so why. Has anyone from the US encountered substantial counterfeit problems too?
  Reply With Quote
Old 24th September 2005, 03:16 PM   #4
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi tlf9999,
Many problems with counterfits in Canada. I continue to buy from an old source, but I have got them from other vendors. I find that if you buy on price you may get some excellent examples of fakes. There are people in the States that have machines to relabel transistors, so beware.

-Chris
  Reply With Quote
Old 24th September 2005, 03:34 PM   #5
diyAudio Member
 
jacco vermeulen's Avatar
 
Join Date: Oct 2004
Location: At the sea front, Rotterdam or Curaçao
Send a message via Yahoo to jacco vermeulen
BMM in Hellevoetsluis sells the 1265N/3182N for a dollar and cents.
Considering that Toshiba hasn't made these either in a long time, you can draw your own conclusion.
These are the shiniest Toshiba devices i've ever seen. (i'm a Toshaholic)
It is easy to find lists of discontinued devices just by googling.

I tend to read more posts than place them, this forum seems to be filled with pics and posts from US citizens who bought fakes.
  Reply With Quote
Old 24th September 2005, 04:32 PM   #6
tlf9999 is offline tlf9999  United States
Account Disabled
 
Join Date: May 2005
Location: none
Quote:
Originally posted by anatech
I continue to buy from an old source, but I have got them from other vendors.
I do that as well. most of my stuff comes from either neighborhood stores that I have frequented a lot or online (more so lately as the neighborhood stores are dying out).

I have bought a lot from digikey and found them to be an excellent source with great customer service. Not the cheapest in town but does save a lot of time in debugging out cheapo/fake parts.

Where do people buy their parts from? Maybe we can list out good / bad experieneces people have?
  Reply With Quote
Old 24th September 2005, 05:03 PM   #7
diyAudio Member
 
Join Date: May 2005
Location: -
Quote:
Originally posted by richie00boy
Nobody can tell from a simple picture like that. I suggest you have a look at Rod Elliot's ESP site and the counterfeit section.
The thought this transistors are fake is because when i used them in a Class A CSS amp the amplifier oscilated heavily. When i replaced them with MJE15030 everything worked OK.

This is not the first time i encounter this kind of problem. A while ago i builded a class A headphone amplifier with BD139 output. This amp was also oscilating until i discovered the BD139's where fake. When i replaced them with new genuie BD139's everything was working fine.

Greetings
  Reply With Quote
Old 24th September 2005, 05:14 PM   #8
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi tlf9999,
My source closed last year. He still orders special for me but ......

I need a new, reliable source. I don't care about the price within reason, I'm happy to pay the going rate for real parts. So a list of reliable suppliers is in order. Two lists (North America and Europe) would be of value I think to most of us.

-Chris

:edited with the permission of Chris
  Reply With Quote
Old 24th September 2005, 05:36 PM   #9
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England


Much as I support the principles of naming and shaming, it is rather iffy ground for diyAudio, legally speaking. I think it is best just to stick to recommendations of good suppliers.

Thanks...
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 24th September 2005, 06:01 PM   #10
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi pinkmouse,
Accept my apologies and remove the offending name please. Is there a way to help people avoid untrusworthy vendors?
-Chris
  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
Counterfeit 2SC5171 ? sandyK Solid State 10 27th October 2008 10:34 AM
Are these transistors counterfeit? geaugafletcher Parts 4 18th January 2007 03:36 PM
counterfeit or clone? HarryDymond Solid State 13 22nd December 2005 05:58 PM
opa627bp....counterfeit? EJ Chip Amps 14 1st April 2005 01:11 PM


New To Site? Need Help?

All times are GMT. The time now is 06:49 AM.


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