swede said:I believe OnSemi/Motorola MJE15030 and MJE15031 are good replacements. You might have to recalculate a resistor or two, don't remember exactly why/which.
If you're going to bias them a lot, you need to put heatsinks on them.
Samuel Jayaraj said:Eccu,
You have listed BF871 (I guess incorrectly shown as BF8712) and BF872; go ahead and use these in place of BF471 and BF472. Yes the original circuit uses MJE340 and MJE350s and the sonic properties of these are supposedly superior to the BFs as pointed out in a related post in this site. I have built the Mini-Crescendo and Crescendo using BF 469, 470, 471 and 472s but was not too happy with the transparency and speed. The post I am referring to said that the MJEs corrected this aspect.
Perform a search! [/QUOTE
Yes, my misspelling. BF8712 = BF871 & BF 872.
I have not found that thread yet. Maybe I have wrong keywords.
BD139, 140 are good and cheap for +- 35 Volts power supply.