gurusan
Golden Master
- Messages
- 6,562
- Location
- Portland, OR
So I've just finished my 2nd millet starving student build, this time using a PCB. (This is a headphone amplifier BTW)
Sounds great and a lot quieter than my messy P2P build...however the balance seems quite a bit off...got to look into that one. Other than that it sounds fantastic and I've graduated from plastic maplin boxes lol.
Here's a pic of the internals. I used arctic silver 5 epoxy that I had laying around to bond the mosfets to the top of the chassis (insulator in between). I also used some cheap thermal paste in between the heatsink and the chassis.
There are a lot of layers of thermal interfaces but the amp has been playing Metallica, Deliverance, and various electronic music for over an hour now and I just checked the mosfets with a temp probe and they are 46-48C so the heatsink and chassis seem to be doing about 15C better than my old to-220 sinks as the mosfets on my old SSMH were about 58-65C
This is really an awesome headphone amp and pretty affordable in audio terms (it's called the starving student after all).
also here are some pics through some of the brainstorming process/choosing heatsink/building:
Sounds great and a lot quieter than my messy P2P build...however the balance seems quite a bit off...got to look into that one. Other than that it sounds fantastic and I've graduated from plastic maplin boxes lol.
Here's a pic of the internals. I used arctic silver 5 epoxy that I had laying around to bond the mosfets to the top of the chassis (insulator in between). I also used some cheap thermal paste in between the heatsink and the chassis.
There are a lot of layers of thermal interfaces but the amp has been playing Metallica, Deliverance, and various electronic music for over an hour now and I just checked the mosfets with a temp probe and they are 46-48C so the heatsink and chassis seem to be doing about 15C better than my old to-220 sinks as the mosfets on my old SSMH were about 58-65C
This is really an awesome headphone amp and pretty affordable in audio terms (it's called the starving student after all).
also here are some pics through some of the brainstorming process/choosing heatsink/building: