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Go Back   Head-Fi: Covering Headphones, Earphones and Portable Audio > Misc.-Category Forums > DIY (Do-It-Yourself) Discussions

Meier Audio CORDA HEADSIX & The Most Recent Sponsored Threads

Celebrating 6 years of Head-Fi, Meier Audio introduces the Limited Edition HEADSIX (portable headphone amp) Head-Fi Support Sales Action




 
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Old 03-19-2008, 09:15 AM   #3091 (permalink)
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ahhh good ol cmoys.





I built this for a forumer from another forum i frequently visit.

On board trickle charger and on board LM7812 Regulator.
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Old 03-20-2008, 03:09 PM   #3092 (permalink)
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Again realised how useful and awesome the KSC 75 is. Purposely built this amp just to pair with it.

Diamond buffered design.
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Old 03-21-2008, 04:33 PM   #3093 (permalink)
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Looks very nice Tze!
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Old 03-22-2008, 02:24 PM   #3094 (permalink)
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I guess asking how you solder so clean like that would be kind of a useless question Tze? Is the answer just practice or is there a trick to it?
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Old 03-22-2008, 04:48 PM   #3095 (permalink)
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Default My SOHA - Finally finished

Case shots:




The tube actually sits slightly lower as here its not pushed down on its place in the socket.

Finished front and rear panels:



The case is a second hand casing from a satellite receiver. I got it very inexpensively from a local electronics store. All casework was done using a dremel knockoff and a powerdrill.
The big rectangular hole in the back is still open, I had planned on installing the RCAs in it, but the PCB is too close.
The RCAs are uninsulated which is creating a ground loop, so that is the first thing I must improve. Just havent found yet from where to get the jacks.

Inside shots:







Still a bit of space left in there for the AlienDAC in progress. If I ever decide to make Jisbos buffers, it might be a thigh fit though.


The handmade circuitboard I made for mounting the transformer:





Some shots while testing the voltages:



The undertube-Led is the only indicator light I have, I wanted to keep the look of the front panel as clean as possible, although Im not satisfied yet of how it looks, I might have to redo it soon.
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Old 03-22-2008, 11:50 PM   #3096 (permalink)
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Originally Posted by Gautama View Post
Looks very nice Tze!
thanks

Originally Posted by JSTpt1022 View Post
I guess asking how you solder so clean like that would be kind of a useless question Tze? Is the answer just practice or is there a trick to it?
again, thanks

Hmmm, practice does make perfect but there's a small trick to it. Try trimming your leads FIRST before you solder. So instead of deformed blob with leads protruding out, you get a perfect round blob of solder joint.

Oh and it pays using good solder wire. I'm using a Kester 245 for the job.

EDIT: Kester 245 is an euthetic blend solder. It does not cost a lot of money. I got it for around RM25 per 1/2kg roll (Around 7USD) in my country.
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Old 03-23-2008, 01:40 AM   #3097 (permalink)
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TzeYang, I'm still amazed by how cleanly you can bridge that many pads. I played around with it a bit when I was reworking one part of my amp, and I think I'm starting to get a feel for doing it without wire jumpers to support the bridging. Do you do each pad one at a time, letting the solder cool for a moment before moving to the next one? I was able to get results closer to yours doing it that way, as opposed to trying to do several at once while the solder was still melted.

As an aside, today I finished applying the v3 revisions to both boards of my amp, and got things wired up temporarily for testing. Sounds great so far, and no more worries about bumping an alligator clip loose when I adjust the volume



I should have some more caps in on Tuesday so I can build the board for the ground channel.
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Old 03-23-2008, 03:12 AM   #3098 (permalink)
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Nice Fitz!
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Old 03-23-2008, 05:09 PM   #3099 (permalink)
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Got all the parts for the ground channel, except for the electrolytics. Debating on whether I should go ahead and start on it now, or wait until Tuesday when I have everything...

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Old 03-23-2008, 05:26 PM   #3100 (permalink)
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if you have time, start it now.

even if you dont think you have the time later to add a few caps, you will find it...
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ACHTUNG - ALLES KOPFPHONERLISTENERS

Alles kopfphonerlisteners non-technischens! Das tubenmachine is nicht for gefengerpoken und mittengrabben. Oderwise is easy schnappen der springenverk, blowenfus, und poppencap, mit spitzensparken, und smokentubes. Geverken inside der tubenmachine is fur der experten only. Is nicht fur geverken inside by das dumpkopfen. Das rubbernecken amateuren keepen das cotton-picken hands in das pockets. Just relaxen, enjoyen der musik, und vatchen das pretty glowentubes.
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