Jed
Well-known member
This is a carry over from here: http://www.groupdiy.com/index.php?topic=26154
I’m trying to mock up a replacement mxp3000 “green blob” to test out my mic pres and get them running again. I’ve got most of the needed parts lying around except for the transistors used in the originals.
Gltech’s schematic specifies “d786” transistors. I’m assuming this is the, now obsolete, 2SD786? Can anyone suggest a common replacement?
I’ve been looking at the 2SC3329. You can get them at http://www.acme-sales.net but it insults my sensibilities to pay $12 in shipping and handling for $4 worth of transistors. Especially when I already need to order something from Digikey. Anybody have a suggestion that digikey stocks?
Also, what kind of capacitors should I be trying out in this circuit? Metal film? Polys?
If I get this working properly I might try swapping some different opamps to see how they sound, and or throw a little pcb together to make this easy.
I’m trying to mock up a replacement mxp3000 “green blob” to test out my mic pres and get them running again. I’ve got most of the needed parts lying around except for the transistors used in the originals.
Gltech’s schematic specifies “d786” transistors. I’m assuming this is the, now obsolete, 2SD786? Can anyone suggest a common replacement?
I’ve been looking at the 2SC3329. You can get them at http://www.acme-sales.net but it insults my sensibilities to pay $12 in shipping and handling for $4 worth of transistors. Especially when I already need to order something from Digikey. Anybody have a suggestion that digikey stocks?
Also, what kind of capacitors should I be trying out in this circuit? Metal film? Polys?
If I get this working properly I might try swapping some different opamps to see how they sound, and or throw a little pcb together to make this easy.