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Old 7th October 2005, 09:07 PM   #1
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Default Need some help finding these

Repairing an older BIAMP SYSTEMS 1200 amplifier. Cannot find many of these exact numders. Don't know much about cross ref. Please assist me in finding these or good equiv. THANKS![list=1][*]MDS60[*]MDS21[*]C2168[*]A958[*]JE18[*]2SB600[*]2SD555[/list=1]
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Old 7th October 2005, 11:05 PM   #2
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hey man,

run a search on ebay and you will find something... i just searched for 2SB600 just to see if it find something and there is a guy selling them!

good luck!
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Old 8th October 2005, 08:28 AM   #3
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This might help for some

http://www.st.com/stonline/products/...171/mje350.htm

but you probably need to find the originals datasheets and check that there aren't too many critical differences...

for example the mds60 comes up with mje350 it says the mds60 is an on semi device.... though a search of the onsemi site turned up nothing....


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Old 8th October 2005, 01:13 PM   #4
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Thanks guys , I really do appreciate the help. I can measure and replace stuff as may be required , but I a little green when it comes to find good equiv. of obsolete parts. I did some research and found additional info on these numbers;
  • c2168 = Sanken 2sc2168
  • a958 = Sanken 2sa958
  • je18 = MJE18(0)
  • 2sd555 is an NEC device
  • 2sb600 is an NEC device
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Old 8th October 2005, 09:17 PM   #5
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you can find most of the info you need by searching on NTE's website... here

use the info there only to get an idea about the spec. of the original devices. the "work-alike" devices that NTE sells are usually factory bulk buy-outs of old stock and what-not that they test for gain and voltage handeling and label them by those parameters ony! i can't say that everything they sell is bad but i had some BC108B & C work-alikes that i used in a fuzz face guitar pedal pcb and boy did they sound bad and after a small research i found out that only the gain was within range but only god knows what transistors i was using.
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