Giggity
Active member
- Joined
- Jun 28, 2014
- Messages
- 33
Hello all. I thought I would make a proper intro. First, I am a DIYaholic. This applies to many things. But within this context, my knowledge is limited. Not a total noob but no electronics degree either. Outside of a few amp repairs, my experience includes a few guitar pedal builds (2 kits and one from a PCB and order the parts separately), A "Spyder" PSU for said guitar pedals and a +/-15 & +48vdc PSU for my Soundcraft mixer. Though, after building it, I found out how to repair the original SMPS.
Recording wise, it's just a hobby and only of and for myself. The Soundcraft mixer (a Spirit E8) is only used for the mic pres and a outboard volume control for the monitors (also DIY). Interface is a M-Audio 2496. I like the PCI card over a USB interface.
Now, on to my current project (about time he shut up ;D). I'm looking to do a mashup of a couple schematics I have found. Lucky, my budget and skills match..... both pretty poor. I want to do a preamp like the T15 from Seventh Circle combined with a 3 channel para EQ. Should be simple enough for my feeble skills. Also, given the room I have to record in (a basement spare bedroom), anything better would be a waste, acoustically speaking.
But first, I want to get the PSU sorted. I took the PSU design I built for the Soundcraft and massaged it a bit. It's a similar design to others I have seen here and elsewhere. I laid it out in LTSpice and ran the sim. It looks pretty good. Below are the so-so schematic that I used for the sim and the sim results. I say "so-so schematic" because the PNP and the NPN are generic and the is no switch I like in the LTSpice library.
Please, give it a look and let me know what you think.
THANKS!
On the graph, green is pre regulator +48, yellow is post regulator +48 out, red is +15 post reg and aqua is -15 post reg
Recording wise, it's just a hobby and only of and for myself. The Soundcraft mixer (a Spirit E8) is only used for the mic pres and a outboard volume control for the monitors (also DIY). Interface is a M-Audio 2496. I like the PCI card over a USB interface.
Now, on to my current project (about time he shut up ;D). I'm looking to do a mashup of a couple schematics I have found. Lucky, my budget and skills match..... both pretty poor. I want to do a preamp like the T15 from Seventh Circle combined with a 3 channel para EQ. Should be simple enough for my feeble skills. Also, given the room I have to record in (a basement spare bedroom), anything better would be a waste, acoustically speaking.
But first, I want to get the PSU sorted. I took the PSU design I built for the Soundcraft and massaged it a bit. It's a similar design to others I have seen here and elsewhere. I laid it out in LTSpice and ran the sim. It looks pretty good. Below are the so-so schematic that I used for the sim and the sim results. I say "so-so schematic" because the PNP and the NPN are generic and the is no switch I like in the LTSpice library.
Please, give it a look and let me know what you think.
THANKS!
On the graph, green is pre regulator +48, yellow is post regulator +48 out, red is +15 post reg and aqua is -15 post reg