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04/18/24 at 09:33:13

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Completed DIY Zen se84cs/zs (Read 6562 times)

itseattlewa

Verified Member

Posts: 6

Completed DIY Zen se84cs/zs
12/27/16 at 21:42:59

Recently completed a DIY Zen se84cs/se84zs clone.

Decware no longer provides DIY pt-to-pt kits so I built this from scratch.

I am happy that this Zen clone worked on first power up and voltages are in keeping with expected values. The output transformers are GXSE15-10K-6ohm with XPWR178 power transformer. I struggled with parts selection including choosing transformers, but the unit seems to be working fine.

Originally I was going to mount the output transformers inside the case as I wanted to emulate the clean Zen look, but mounting on top proved far easier. I wanted all top mounted input/outputs as I might put a wood frame around the case eventually.

I am running Fostex FE206EN and my next project is double bass enclosures.

All in all a success, except it seems I cannot bridge the amp into mono as the outputs are not floating. At least when I bridge into mono into a single speaker it doesn't seem like I am getting 5 watts or a significant increase in power. Any comments on this issue would be welcome.

zen1.JPG

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itseattlewa Verified Member Posts: 6	Re: Completed DIY Zen se84cs/zs Reply #1 - 12/27/16 at 21:47:08 Another pic.
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itseattlewa Verified Member Posts: 6	Re: Completed DIY Zen se84cs/zs Reply #2 - 12/27/16 at 21:49:22 Another pic.
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Lonely Raven Seasoned Member Jack of all Trades, Master of None Posts: 3567	Re: Completed DIY Zen se84cs/zs Reply #3 - 01/02/17 at 20:38:28 Looks great! I have a kit off bought off ProgRob - I'm not even sure what all is in there, but it's one of the older circuit board kits. Maybe I'll have time later this winter...and hopefully looks as good as yours!
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Lin Ex Member	Re: Completed DIY Zen se84cs/zs Reply #4 - 01/02/17 at 22:11:47 Nice looking build. Curious why you didn't turn the chassis and put the transformers in a row along the back?
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itseattlewa

Verified Member

Posts: 6

Re: Completed DIY Zen se84cs/zs
Reply #5 - 01/02/17 at 23:24:55

I did consider horizontal with all transformers along the back, which would have looked good.

I was originally trying for a classic zen look with the output transformers mounted underneath, and I laid out the parts and cut the openings with that intention. But these OTs were too large to do that easily, so luckily mounting them on top worked out.

I relied heavily on the excellent 12 part build video showing the construction of a classic zen amp and wanted the layout similar to make the build easier. I laid out the components so that I could follow the build steps and sequences outlined in the video, which I did.

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