Author Topic: ALERT!: Poor quality D41464 chips  (Read 3424 times)

digi2t

  • Awesome!
  • ****
  • Posts: 4659
  • Total likes: 1365
  • "Digital? Any idiot can count to 1!" - Bob Widlar
ALERT!: Poor quality D41464 chips
« on: December 21, 2012, 11:58:18 AM »
WARNING!!!

I recently bought some D41464 chips from here; http://www.ebay.ca/itm/10PCS-IC-D41464C-12-NEC-18-Pin-DIP-NEW-GOOD-QUALITY-/290815749353?pt=LH_DefaultDomain_0&hash=item43b5f82ce9 .

I figured for the price, $1.38 each, I would give them a try. Out of the 10, I tried plugging any random set of four into my XP-ALL. In 200 or 400 modes, I get higher than normal hum, and 4 of the chips induced a lot of hissing into the audio to the point where the guitar audio is almost wiped out.

These chips are marked "NEC JAPAN", whereas the ones I've tried that work are either "NEC USA", or "NEC IRELAND". To date, these are the Ebay sellers from whom I've bought chips, and have gotten good product from are;
http://www.ebay.ca/itm/RAM-D41464C-12-NEC-18-Pin-DIP-41464C-41464-/370263994587?pt=LH_DefaultDomain_0&hash=item56357430db (USA chips)
and
http://www.ebay.ca/itm/NEC-UPD41464C-10-DYNAMICNMOS-RAM-/261052206092?pt=LH_DefaultDomain_0&hash=item3cc7ec8c0c (IRELAND chips)

Buyer beware!!
  • SUPPORTER
Dead End FX
http://www.deadendfx.com/

Asian Icemen rise again...
http://www.soundclick.com/bands/default.cfm?bandID=903467

"gigantically smaller."  - pinkjimiphoton

"The more "slam" you can get, the better." - anotherjim

Govmnt_Lacky

Re: ALERT!: Poor quality D41464 chips
« Reply #1 on: December 21, 2012, 12:08:33 PM »
Thanks for the heads up Dino!

Still have not tried those chips I got from Jameco yet. I will post when I verify.
A Veteran is someone who, at one point in his or her life, wrote a blank check made payable to The United States of America
for an amount of ‘up to and including my life.’

digi2t

  • Awesome!
  • ****
  • Posts: 4659
  • Total likes: 1365
  • "Digital? Any idiot can count to 1!" - Bob Widlar
Re: ALERT!: Poor quality D41464 chips
« Reply #2 on: December 21, 2012, 12:34:01 PM »
Thanks for the heads up Dino!

Still have not tried those chips I got from Jameco yet. I will post when I verify.

Roger!
  • SUPPORTER
Dead End FX
http://www.deadendfx.com/

Asian Icemen rise again...
http://www.soundclick.com/bands/default.cfm?bandID=903467

"gigantically smaller."  - pinkjimiphoton

"The more "slam" you can get, the better." - anotherjim

Ronan

Re: ALERT!: Poor quality D41464 chips
« Reply #3 on: December 21, 2012, 04:08:57 PM »
This problem is going to get worse I feel. I had a similar experience with LM13700.

Once I knew what some of the "real" LM13700's looked like, and tried to buy a few more from ebay of some with a "real" pic, what I received was not what was shown in the pic. What are some sellers up to?

I've recently been buying IC's from RS components (Australia), or USA ebay sellers if RS doesn't have what I want. Digikey and Mouser are not feasible due to international shipping rates.

Tayda usually states the manufacturer of their IC's, but their range is not extensive.

digi2t

  • Awesome!
  • ****
  • Posts: 4659
  • Total likes: 1365
  • "Digital? Any idiot can count to 1!" - Bob Widlar
Re: ALERT!: Poor quality D41464 chips
« Reply #4 on: December 21, 2012, 04:20:18 PM »
They're buying up all our debt.
They're hacking all our vital computer systems.
They're selling us useless crap.
They're importing all our jobs.
They're exporting cheap labour.

It's just a matter of time...

Better start learning Mandarin.  :icon_evil:
  • SUPPORTER
Dead End FX
http://www.deadendfx.com/

Asian Icemen rise again...
http://www.soundclick.com/bands/default.cfm?bandID=903467

"gigantically smaller."  - pinkjimiphoton

"The more "slam" you can get, the better." - anotherjim