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Comments for my PCM2702 DAC layout? - Page 4

post #46 of 613
9/16/08 at 10:38am
VERY clean build, Tom. Almost as if you aligned those little buggers with a laser :P That must be where your time went though.. and scrounging around for parts. Say, do you use mousers custom labeling? I guess I spent the extra time there, but once I had all the bits in labeled bags, build time was around 2~3 hours.. even with being somewhat finicky about alignment, etc..
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post #47 of 613
9/16/08 at 12:00pm
Quote:
Originally Posted by ruZZ.il View Post
VERY clean build, Tom. Almost as if you aligned those little buggers with a laser :P That must be where your time went though.. and scrounging around for parts. Say, do you use mousers custom labeling? I guess I spent the extra time there, but once I had all the bits in labeled bags, build time was around 2~3 hours.. even with being somewhat finicky about alignment, etc..
Thanks - I guess that's why it takes me so long. To tell the truth, I thought that was quick.
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post #48 of 613
9/16/08 at 3:28pm
Looks great! I love the new smaller layout without all the powering options.

Are you considering doing kits for this?
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post #49 of 613
9/16/08 at 4:11pm
Quote:
Originally Posted by MASantos View Post
Looks great! I love the new smaller layout without all the powering options.

Are you considering doing kits for this?
Thanks! Yes, we are planning on making kits (the boards will be sold separately as well), but "when" for kits depends on how much I can do in the next few weeks. We have a lot of things coming in the pipeline - this is just one of them.
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post #50 of 613
9/16/08 at 4:52pm
I guess you've already gone to fab, but if not you might want to connect one of the mounting holes to the ground plane and put some bare copper for an easy ground test point and connection to chassis ground. Might add a second OG point as well to make wiring easier. I should've come up with these when you first asked, but that's what prototyping is for right .

Great work Tom and Colin, this should outperform the Alien and it's smaller.
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post #51 of 613
9/16/08 at 5:16pm
Quote:
Originally Posted by error401 View Post
I guess you've already gone to fab, but if not you might want to connect one of the mounting holes to the ground plane and put some bare copper for an easy ground test point and connection to chassis ground. Might add a second OG point as well to make wiring easier. I should've come up with these when you first asked, but that's what prototyping is for right .

Great work Tom and Colin, this should outperform the Alien and it's smaller.
Good comments!

There isn't much room for test points. We'll document some of the pads for checking voltages, however.

There will be a 2nd OG in the production boards.
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post #52 of 613
9/16/08 at 5:33pm
I meant add a bare pad around the mounting hole so the mounting screw will connect ground to the chassis, since they're currently just holes with no pad.
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post #53 of 613
9/16/08 at 6:37pm
Quote:
Originally Posted by error401 View Post
I meant add a bare pad around the mounting hole so the mounting screw will connect ground to the chassis, since they're currently just holes with no pad.
Yes - I understood what you meant, but didn't address it.

There are some peculiarities with the applications we have planned. One of the biggest is to have a prepared mounting position for the Bantam with traces on a new version of the Millett MAX PCB. The area where the Bantam will go is in the rear around the MAX's Power Supply portion of the board. Most of that area is AC groundplane, so it may not be a good idea to mix up the grounds. However, the ground plane is there under the mask, so a little scraping would probably ground the plane to a mounting screw if a washer was used.
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post #54 of 613
9/16/08 at 9:00pm
Do you guys think this will be easier to build also than the Alien?
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post #55 of 613
9/16/08 at 9:37pm
its much of a muchness.
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post #56 of 613
9/16/08 at 9:40pm
Quote:
Originally Posted by ruZZ.il View Post
its much of a muchness.
OK - you've got to translate that for us.
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post #57 of 613
9/16/08 at 9:56pm
I actually pondered if it were actually something ever used or me being silly..
I found things like these:
much of a muchness - Wiktionary
and some others..
It's pretty much: "Pretty much the same"
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post #58 of 613
9/16/08 at 10:06pm
Quote:
Originally Posted by ruZZ.il View Post
I actually pondered if it were actually something ever used or me being silly..
I found things like these:
much of a muchness - Wiktionary
and some others..
It's pretty much: "Pretty much the same"
OK, very good!

I agree with Russ, then: much of a muchness.

Actually, I don't know how he feels, but I thought the board was a little bit easier to solder than the Alien board. It seemed to me that there was less of a tendency for bridging, but it could very well be my imagination. Even if not, it has to be categorized as a "nuance" at best.

Some things are easier - Colin mixed in 1206 parts wherever he could. So that makes things a bit easier to handle. On the other hand, the TPS regulators are harder. I was a bit taken back at how tiny those things are. So, it's probably a wash: much of a muchness.
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post #59 of 613
9/19/08 at 3:27pm
Quote:
Originally Posted by tomb View Post
On the other hand, the TPS regulators are harder. I was a bit taken back at how tiny those things are.
tom you know we're putting cover sheets on the tps reports now right. mmk great i'll just send you another copy of that memo
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post #60 of 613
9/19/08 at 5:20pm
Quote:
Originally Posted by ruZZ.il View Post
I actually pondered if it were actually something ever used or me being silly..
I found things like these:
much of a muchness - Wiktionary
and some others..
It's pretty much: "Pretty much the same"
haha glad you cleared that up. I'm looking forward to this one, hope you guys make a kit that ships internationally, that would be great for people like me where it's difficult and expensive to order from more than one place
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