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post #5461 of 9663
Nice job zkool!

Colin, looks great. Looking forward to further impressions.
post #5462 of 9663
Colin..congrats on getting the I/V going...look forward to more impressions and actually building one.
post #5463 of 9663
Quote:
Originally Posted by zkool448 View Post
I wish I could take pics like linuxworks

Anyway, at last my Bijou is done. Here are some pics to share, hope you like it and thanks for looking!

cheers -zk
Stunning!
I really like the silver painted chassis.
post #5464 of 9663
That's some absolutely amazing work there zkool! I haven't been here all week and it's nice to come back to something so awesome.
I'm still inspired to do some woodworking, it'll happen eventually
post #5465 of 9663
Wonder if vlad has the right connectors, since we'll be seeing him tomorrow
post #5466 of 9663
Quote:
Originally Posted by Voodoochile View Post
Is that aluminum, or painstakingly thorough prep on MDF?
It's the latter

Quote:
Originally Posted by mojo View Post
Thanks for posting! Any chance of some videos?
Actually I’m thinking about posting a youtube clip, perhaps I will when I have some free time and post one. BTW, anything in particular you’d also like to see on the video clip besides them needles a-bouncing?

Quote:
Originally Posted by cfcubed View Post
No stock case for sure, he talks about techniques, etc here.
So how about going into production for some of your gorgeous amps? Or opening a headamp art studio or something.. I kid, I kid.
Production you say? We’ll have to see lol

Quote:
Originally Posted by jdkJake View Post
zkool, I think you can safely update your signature. That is no longer "casework in progress"!
jk, updated thanks

Quote:
Originally Posted by wiatrob View Post
The coolest thing: it's MDF! Great work as usual Joel, enjoy your vacation!
Will do Bill, thanks! It’s a well-deserved break with the family and looking forward to this two weeks off!
post #5467 of 9663
a new build!

the y2 prototype lives. it works!!



that's the y1 'receiver board' (for spdif and i2s) on top and the y2 board, below.

some stages in the pcb build:






and the guy who actually does the real business, here; the DAC chip:



I confess, I used 'flood and suck' method to solder these high density surface-mount chips. throw extra solder on all the pins and then wipe off with solder wick pressed by the tip of the iron as you swipe across the pins. leaves just a bit of solder behind and usually (hopefully) clears all bridges.

began the build early in the AM today. missed some parts, so ran out during the day for them. finished the build. it didn't work ;( amb suggested I connect the data wire. doh! that worked build complete by dinner time.

update: I have a GUI for the gamma2 here's a sneak peek:



its showing which input to the DAC is selected (both a short name and a 16 char max longname on the bottom); it also shows the type of port (coax/opto), its port number, and 2 weird settings that this DAC supports: an anticlipping on/off switch and a filter a/b/c switch. that's the dot thing and the Fa (filter A).

you can control this with an IR remote (sony dvd, etc) and each button on the keypad (1..3, 4..6, etc) can be assigned one setting, so pressing 4 gets filter A, pressing 5 gets filter B and so on. there's enough spare keys to give each function its own button and area on the display

arduino based and using that lcd backpack I built a few days ago. running new code (just wrote it today) that managed the wolfson dac chips at the so-called hardware-mode level.

edit: adding inside view shots with more final mounting/wiring:



post #5468 of 9663
Quote:
Originally Posted by linuxworks View Post
a new build!

the y2 prototype lives. it works!!
update: I have a GUI for the gamma2 here's a sneak peek:


Now that is cool.

I gotta get one.. or perhaps get linuxworks to build me one.. lol (j/k)
post #5469 of 9663
Quote:
Originally Posted by diego View Post
Here are some pictures of a build I just finished. It is a MAD Ear + HD version I built from scratch using the schematics generously provided by Dr. Peppard. The amplifier section is exactly the same as an Ear + HD or Super, operating at roughly the same voltages as the Super. The PS is different than the Super however. It is full wave rectified by a 5AR4 or 5U4G tube and uses a choke instead of a resistor in the second stage. Also, the last filter stage is separated in right and left channels. Finally, it uses AC instead of DC for the tube heaters.

Although it's too early to compare the sound to my B22, so far it sounds great.
Looks really nice, Diego. Are those large electros from JJ? I like how you removed the labels from the trafo and choke and reapplied them to the chassis under their respective footprints. Nice touch.

Looking forward to reading a full review sometime soon!
post #5470 of 9663
Linuxworks- great pics as always. That front panel came out great- both from a fabbing standpoint, and the functionality. Nice...
post #5471 of 9663
Yes, they are JJ but there are other options in that same size. You can use Mundorf and Jensen among others. I thought I'd build it using less expensive caps first and upgrade it later.

I'm not a reviewer but I may write a few comments after some time listening to it.

Regards.
post #5472 of 9663
Linuxworks, your work on control is (and has been for the past several months) really really impressive to me. I just keep telling myself that my mechanical volume and input adjustments are adequate, since they are more old-school, have awesome a physical click is, and are cheaper...

...but I'm not fooling myself. I wish I had the expertise!!!
post #5473 of 9663
I thought they looked familiar. I bought one to go in my HP signal generator, they are pretty nice caps.

The amp came out great!
post #5474 of 9663
Quote:
Originally Posted by El_Doug View Post
Linuxworks, your work on control is (and has been for the past several months) really really impressive to me. I just keep telling myself that my mechanical volume and input adjustments are adequate, since they are more old-school, have awesome a physical click is, and are cheaper...

...but I'm not fooling myself. I wish I had the expertise!!!
thanks

not to worry, the code, schematics and plans will be released. I've given out some snapshots of the code and soon hope to have some stable hardware layouts. my focus was to try to establish some building blocks that are generic enough to be useful in rapid prototyping (or 'building' as we say here)

once you build one and go thru the source code (there will be tutorials, once I write them) you'll see that its not all that hard. having a framework to start with is the hard part and that's the part I'm trying to get 'clean' so that its most understandable by people other than me . making it user-customizable (source code and compilers are all free) and making the code easy enough *to* modify is a goal of mine. that way people can adapt the code to do what they want; and that's *really* the fun part of a project like this.

I'm just learning this stuff, myself, so I'm taking notes to save others time on the confusing parts
post #5475 of 9663
Quote:
Originally Posted by Voodoochile View Post
Linuxworks- great pics as always. That front panel came out great- both from a fabbing standpoint, and the functionality. Nice...
thanks. fabbing was just a hand drill and an x-acto knife. the good thing about abs plastic is that its hand workable, so you can literally slice thru plastic and get square toslink cut-outs and lcd cut-outs pretty square.

the IR receiver is behind the single hole to the left of the lcd. I could not find a nice bezel for it, so its just a bare hole. since all functions are on the IR remote, there's no need for more front panel drilling or holes. kind of minimal
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