Replacement for 2sc1318?

Detailman

Addicted to tweaking
I ordered a couple NTE289A replacements and they seem to be ok. But they are supposed to be paired with 290A.
I'm working on the power supply board for sx 950. All I could find were the NTE replacements and I couldn't get the 290 to replace the 2sa720's.
Someone had replaced one of the 1318's with a tip31b and it was working but was noisy.
Just wondered if any one has any other replacements for 2sc1318 or 2sa720?
 
The power supply of the Marantz 4400 has three 2sc1318's - TO-92 it looks like. You are saying its OK to use Radio Shack's 2n4401's ?

I might have to try them

I find it hard to believe Radio Shack carries something worthy of putting in cherished vintage gear :)
 
The power supply of the Marantz 4400 has three 2sc1318's - TO-92 it looks like. You are saying its OK to use Radio Shack's 2n4401's ?

I might have to try them

I find it hard to believe Radio Shack carries something worthy of putting in cherished vintage gear :)

The 2sc1318 is an npn ecb 50v, 0.5a 0.625w 85-350hfe 200 mhz transistor with eCB layout

the 2n4401 is an npn ebc 60v, 0.6a 0.625w 100-300hfe 250 mhz transistor. with eBC layout

so watch the pinouts!!

plus from a sx-1010 thread that eventually focused on phono amps:

EchoWars said:
Phono hint: The 2N4401 and 2N4403 are cheap as dirt, and quiet as a churchmouse (but the KSA992 and the KSC1845 are peachy as well, and probably give better input impedance). I too have had lots of problems with those 2SA725's Pioneer used.

Edit: I had no idea the KSA992 and KSC1845 were so cheap from Mouser. I just ordered a good sized pile of them. :thmbsp:
 
Because RatShack can buy them for $0.06 each and sell them for $1.99 each, sure...they'll carry them.

2N4401 & 2N4403 are 'open' numbers...anyone can make one and put these numbers on 'em. The only ones I trust are from On-Semi or Fairchild.
 
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