Hi gain NPN?
- TV-Set
- Breadboard Brother
High gain Si NPN, hFe possibly around or higher than 800.
Any suggestions??? thx
Any suggestions??? thx
- Nocentelli
- Tube Twister
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MPSA18?
modman wrote: ↑ Let's hope it's not a hit, because soldering up the same pedal everyday, is a sad life. It's that same ole devilish double bind again...
- juanro
- Cap Cooler
Aren't those Darlingtons? If you don't have them you can rig your own with almost every NPN pair...
Regards,
Juanro
EDIT: MPSA13 is a darlington, MPSA18 is a general pourpose npn Hfe 500 - 1500. You can also try some 2N5089 Hfe 400-1200.
Regards,
Juanro
EDIT: MPSA13 is a darlington, MPSA18 is a general pourpose npn Hfe 500 - 1500. You can also try some 2N5089 Hfe 400-1200.
La única verdad es la realidad.
- TV-Set
- Breadboard Brother
Rig em, that's what I'm doing right now. Is there some king of formula to calculate the hFe for such a Darlington? I used a pair of NPNs with very low gain (about 40 each) and measuring the resulting darlington with my dmm I read something over 1000 and then it sais the number's too damn largejuanro wrote:Aren't those Darlingtons? If you don't have them you can rig your own with almost every NPN pair...
Regards,
Juanro
EDIT: MPSA13 is a darlington, MPSA18 is a general pourpose npn Hfe 500 - 1500. You can also try some 2N5089 Hfe 400-1200.
EDIT: ok, think I found it http://en.wikipedia.org/wiki/Darlington_transistor