Tech Square

Chip ID

198.24.6.168

shermanr@prw.net

Any idea what this IC could be? It has no letters or markings. My best guess is an Opto-coupler, but there no schematic available. This board is inside an Otto-1 Tube Matching unit once sold by New Sensor some 9 years ago.

Follow Ups:

RE: Chip ID - Tweekeng 20:59:09 01/28/09 (4)
Hmmm... Guessing just by the number of legs then an opto is a good guess.

Could you sketch out the circuit? Seeing how it is connected to other components will aid in identification.
- RE: Chip ID - shermanr@prw.net 04:55:14 02/04/09 (2)
  It's a Russian Bridge Rectifier. The two middle pins on each side are AC IN and the top and bottom pin sets are + and -. Pretty weird but true. Here's the pinout.... As I work for a multi-national Telecom company a friend in Ukraine helped me out. This chip is in the small PC board on the Otto-1 Tube Matching Tester for any Otto-1 owners. The schematic for the Otto-1 is not readily available.
  - And notice the metric pin spacing ! - clifff 11:55:34 02/08/09 (1)
    2.5mm instead of 2.54mm (0.1")
    
    Boy did that cause a shed load of trouble in the 80s trying to sell chip testers to the East !!
    
    14 pin dip will just about go in a socket - 40 pin - forget it!
    - RE: And notice the metric pin spacing ! - shermanr@prw.net 15:13:56 02/10/09 (0)
      You bet... different spacing. I replaced with a 100V, 1.5A Bridge Rectifier and the tester is working now. The solution was to solder some jumper wires from the PC board to the bridge. I wrapped it in electrical tape and tucked it between the two PC boards. Not pretty but works!
- RE: Chip ID - shermanr@prw.net 08:46:33 02/02/09 (0)
  Hi and thanks.
  
  I just got the info this morning from my friend in the Ukraine.
  
  It's a Russian Bridge Rectifier IC Chip.
  
  http://www.chipinfo.ru/dsheets/diodes/407.html
  
  Now I need to either order one, or adapt a standard 4 pin Bridge into this circuit. I would have never guessed this one.. did look like and Opto Coupler.
  
  This is inside an Otto-1 Tube Matching unit I am repairing.

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