Graz
500+ Head-Fier
- Joined
- Apr 3, 2004
- Posts
- 726
- Likes
- 15
Well, I finally finished my Mint...
I'd originally planned on some sort of wall wart, but in the end decided to go with battery power. I also added a ground channel, with the implementation pulled directly from the Pimeta design. I guess this makes the design more Pimeta than Mint...sort of a hybrid.
Component choices:
OPA627 for all three channels
BUF634 for all three channels, double-stacked on left/right channels
1000uf 25V Black Gates in the power supply
1uf Wima input caps
Alps Blue
Neutrik locking 1/4" jack
Cardas RCA's
Silver wire (0.80mm) with teflon tubing in the signal path
CRD's for biasing
Vishay-Dale resistors
Decided on a red LED...it just looked better with my enclosure.
Wiring was a chore, I must say...next time I'll buy PCB's. That said, I lucked out & wired it all up right the first time. The amp worked on the first power-up, but I encountered some ground buzz/hum. This ended up being a combination of poor interconnects & my failure to properly tighten the nuts on the backs of the RCA's. Once this was corrected, the amp ran fine.
Pics:
I'll be interested to see what kind of battery life this thing gets...I'm kinda worried! I may yet end up adding some sort of AC supply, but we'll see.
Lastly, I wanted say thanks to the folks who helped with my questions in other threads.
Peace,
Graz
I'd originally planned on some sort of wall wart, but in the end decided to go with battery power. I also added a ground channel, with the implementation pulled directly from the Pimeta design. I guess this makes the design more Pimeta than Mint...sort of a hybrid.
Component choices:
OPA627 for all three channels
BUF634 for all three channels, double-stacked on left/right channels
1000uf 25V Black Gates in the power supply
1uf Wima input caps
Alps Blue
Neutrik locking 1/4" jack
Cardas RCA's
Silver wire (0.80mm) with teflon tubing in the signal path
CRD's for biasing
Vishay-Dale resistors
Decided on a red LED...it just looked better with my enclosure.
Wiring was a chore, I must say...next time I'll buy PCB's. That said, I lucked out & wired it all up right the first time. The amp worked on the first power-up, but I encountered some ground buzz/hum. This ended up being a combination of poor interconnects & my failure to properly tighten the nuts on the backs of the RCA's. Once this was corrected, the amp ran fine.
Pics:
I'll be interested to see what kind of battery life this thing gets...I'm kinda worried! I may yet end up adding some sort of AC supply, but we'll see.
Lastly, I wanted say thanks to the folks who helped with my questions in other threads.
Peace,
Graz