Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › Beginner wondering how hard it is to put together a GrubDAC and MiniMAX
New Posts  All Forums:Forum Nav:

Beginner wondering how hard it is to put together a GrubDAC and MiniMAX

post #1 of 10
8/3/10 at 5:02am
Thread Starter 

Alright, so I'm looking towards entry level DACs and amps for my computer setup so I won't be doing my HD555's injustice by plugging it into onboard sound. The GrubDAC and MiniMAX both sound like a great place to start, $50 for the DAC and $220 for the amp. Thing is, I've never done any SMD soldering at all, I've done a little bit of soldering (only cables though, no PCBs), but I haven't done that much electronic DIY outside of doing an arcade stick mod and doing the cables for a car head unit. But, I do have soldering equipment in my drawer just waiting to be used, so I thought, why not?

 

So, my question is, how hard are the current kits on Beezar to assemble? Do they ship to Australia? Are the AMB kits even harder to put together? Oh, and how come I see 3.5mm jacks on these amps? Wouldn't most headphones that require amping be 6.3mm? Is there even a difference if you use 3.5mm compared to 6.3mm?

Reply
post #2 of 10
8/3/10 at 5:18am

Yes. Beezar will ship to Australia. If you haven't done much soldering, you will probably struggle with the SMD parts, but you could do some practice.

 

Tangent has some excellent soldering videos at:

http://tangentsoft.net/elec/movies/

 

No difference between a 3.5 & 6.3mm except size. The AMB Mini³ is designed as a portable amp, which will presumably be used by people with ipods and earbuds and such. Desktop amps will come with a 6.3mm.

Reply
post #3 of 10
8/3/10 at 5:47am
Thread Starter 
Quote:
Originally Posted by fordgtlover View Post

The AMB Mini³ is designed as a portable amp, which will presumably be used by people with ipods and earbuds and such. Desktop amps will come with a 6.3mm.


I thought so, but an amp that uses tubes is surely meant for desktop use, no?

Reply
post #4 of 10
8/3/10 at 6:22am

The MiniMax is meant to be a desktop amp. It's a pretty straightforward build, as long as you load the components on the PCB correctly.

 

It's possible to add a 3.5mm jack on the MiniMax but you have to drill the panel yourself.


Edited by Lil' Knight - 8/3/10 at 6:23am
Reply
post #5 of 10
8/3/10 at 7:49am

A lot of people have done the GrubDac as their first (SMD) build, me included, and it is absolutely doable.

Just look through the various threads for good tips, esp.: http://www.head-fi.org/forum/thread/495043/grubdac-step-by-step-build-guide and http://www.head-fi.org/forum/thread/445155/the-grubdac/480

Don't know about the MiniMAX, other than that I've been contemplating it myself.

 

Good luck!

Reply
post #6 of 10
8/3/10 at 7:53am
Thread Starter 
Quote:
Originally Posted by Lil' Knight View Post

It's possible to add a 3.5mm jack on the MiniMax but you have to drill the panel yourself.


Wait, so it has a 1/4" jack? Nice! All the pics I've been looking at make it seem like a 3.5mm jack. 

Reply
post #7 of 10
8/3/10 at 8:35am

Well, at least you should read the MiniMax's website first... The jack is 1/4".

Reply
post #8 of 10
8/4/10 at 9:56am

If you've never done SMD before and you plan on making a Grub as your first SMD project, I would probably recommend you get double the necessary pieces, as it's fairly easy to destroy something if you have little soldering experience (like me). The way I'm doing it is I'm building three AlienDACs (from PCBs I got maybe four years ago, lol) as practice for my Grub, so I know exactly what to do. It's definitely working, I'm getting a lot better at SMD just from working on these Aliens. The PCM2706 will be the hardest thing to solder, though - definitely find some nice soldering equipment and watch a lot of videos, it helps a lot.
 

Reply
post #9 of 10
10/2/10 at 4:08am

So have you figured out a way to combine the two? How hard would mounting the DAC board over the PCB and running the USB input near the RCA Inputs and then adding a switch in to select the source?  I don't have any EE skills to redesign the current PCB, so it will be just hacking the two together.  Would there be a better way to switch inputs between the DACs RCA out and the stock RCA Inputs?  I know I could just make a stock grubDAC and plug it into the Input RCAs externally, but what fun is that if most of my source input will be a laptop/desktop PC?

Thanks,
St Veronus

Reply
post #10 of 10
10/2/10 at 5:00am
Quote:
Originally Posted by StVeronus View Post

So have you figured out a way to combine the two? How hard would mounting the DAC board over the PCB and running the USB input near the RCA Inputs and then adding a switch in to select the source?  I don't have any EE skills to redesign the current PCB, so it will be just hacking the two together.  Would there be a better way to switch inputs between the DACs RCA out and the stock RCA Inputs?  I know I could just make a stock grubDAC and plug it into the Input RCAs externally, but what fun is that if most of my source input will be a laptop/desktop PC?

Thanks,
St Veronus


You're talking about a MOSFET-MAX, which is made with the new MAX V1.2 PCB - relays and connectors are onboard the PCB to mount a BantamDAC or GrubDAC right on the board.  Check out this thread: http://www.head-fi.org/forum/thread/233941/new-millett-hybrid-maxed-amp/6210#post_6830281  funch put the GrubDAC in his - here's a couple of pics of his:

100_2146.jpg?t=1280974739

100_2148.jpg?t=1280974803

 

 

Also pics of mine here:

1000x500px-LL-9e9b4f76_MOSFET-MAX.jpg

The switch on the front switches between the onboard BantamDAC and a GrubCableDAC connected through the RCA inputs.

Here are pics of the prototypes:


MAXv1.2a-3-sm.jpg


MAXv1.2a-4-sm.jpg

Reply
New Posts  All Forums:Forum Nav:
  Return Home
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › Beginner wondering how hard it is to put together a GrubDAC and MiniMAX