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Zkit60 Introduction (Read 2298 times)
dank
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Zkit60 Introduction
03/12/18 at 20:05:20
 
The Zkit60 is a solid state amp that actually sounds good.  The output stage is a class AB mosfet design delivering 60 watts per channel.  Some of you have heard the Zkit60 at Decfest 2017 for a half dozen songs or so.  I've been listening to the prototype and a number of builds into different chassis for about a year now.  The amp just keeps getting better and better the more I listen to it.  To be offered at a highly praised (traditionally) tube shop like Decware is a HUGE endorsement.

The kit is designed to go into the chassis of your choice.  With one of the better chassis I've found also being offered for sale.  The amp can be built on a board, like the Zkit1, if an appropriate amount of heat sink material is supplied for the five flat pack semiconductors.  It can also be built into an old Dynaco 120 chassis and can even use the original Dynaco 120 power transformer (again, suitable heat sink material must be provided).

Lets get building!


Dan

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Donnie
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Re: Zkit60 Introduction
Reply #1 - 03/12/18 at 23:45:53
 
Hmmm, very interesting.
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Steve Deckert
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Re: Zkit60 Introduction
Reply #2 - 03/30/18 at 02:20:28
 




Here is the link to the kit:  http://www.decware.com/newsite/ZKIT60.html

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Donnie
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Re: Zkit60 Introduction
Reply #3 - 03/30/18 at 02:46:00
 
Hmmm, working with tubes scares the hell out of me, but this for some reason doesn't.
I need to finish up some current projects, polishing a aluminum intake manifold for a flat head Ford, building some sort of ridiculous sub for my nephew's car. But after that I don't really have anything except for a couple of speaker projects......
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stone_of_tone
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Re: Zkit60 Introduction
Reply #4 - 12/29/18 at 18:38:01
 
Donnie, did you build one or are still considering?
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Donnie
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Re: Zkit60 Introduction
Reply #5 - 01/04/19 at 17:27:43
 
Stone,
I'm still contemplating if my skill set is up to par for this amp.
I did listen to one of these amps at the DecFest last October and was very impressed. It had the right sound for my taste and plenty of headroom playing some Monoliths.
I would think that it wouldn't be that difficult to build, it looked pretty straightforward and tidy.
Truthfully, for the price of a finished one, I don't see how you could go wrong.....
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4krow
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Re: Zkit60 Introduction
Reply #6 - 01/04/19 at 20:01:26
 
Donnie,

 Really? YOU wonder if you have the skill level needed for this build? From what I gather, if you don't have the skill, you will likely acquire it. If you buy this amp, and for some reason don't want to start/finish it, please let me know. I will either finish it for you, or maybe even buy it from you, especially if you have put a bit of your own 'design' into the build.
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Donnie
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Re: Zkit60 Introduction
Reply #7 - 01/04/19 at 22:08:44
 
Dan,
Please elaborate on what skills I would need.
I would assume soldering, I'm pretty sure I can "fake" that.
What kind of Multimeter skills would I need? That would probably be the part I would be most nervous about, I'd hate to probe this when I needed to probe that and end up letting all of the smoke out of the insides.
I can somewhat follow a electrical schematic, I figure that there is more than enough stuff online that could get me through that, a print is a print, right?
The case work doesn't scare me in the least bit, metal cutting is all I've done for the last 41 years (even my 10 years in the big house, they put me in charge of stamping out licence plates) Grin
So I guess what I'm asking is what would it take a semi skilled but highly motivated individual such as myself to build one of these amps and not screw it up?
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4krow
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Re: Zkit60 Introduction
Reply #8 - 01/04/19 at 22:42:11
 
 Donnie,

 Just download the instruction manual of this kit. It gives all the info that you will need for tools, and experience. really, I don't see a problem here for you since the bulk of it involves circuit boards, and the machining/drilling that you would be doing is old hat to you.
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dank
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Re: Zkit60 Introduction
Reply #9 - 01/05/19 at 23:47:57
 
Donnie

I would say the Zkit60 kit build is more difficult mechanically than it is electrically.  You do have to populate, solder, and trim / clean 3 circuit boards, but they are straight forward and "expected"...there is nothing new here.

Mechanically, there is some new stuff that the average person has not done before.  Holes most be drilled in-between the heat sink fins for bolts that mount the circuit boards and bolts that mount the power transistors in a "close enough" position so the leads can be bent at 90 degrees so they touch the proper eyelets on the circuit boards so they can be soldered in place.  There is even more to it if the newer, smaller, chassis (which I recommend) is used such as this one:

https://www.ebay.com/itm/2412C-Full-Aluminum-Enclosure-mini-AMP-case-power-ampli...

When building in this smaller enclosure it is best to mount the two audio boards "mirror image" to each other (so one is mounted up-side-down) so the large capacitors almost touch - this leaves plenty of room (where the capacitors aren't) for the power transformer.  Again, this is all mechanical and just requires a little planning before the drilling starts.  And even if you goof it only means a few extra holes that can be plugged (epoxy glue) and touch up painted.

I recommend buying the circuit boards and parts from Decware and then buying the chassis yourself from Ebay.  That way the chassis is only shipped once.

Multi-meter wise, if you follow the directions you shouldn't have any trouble.  There are current measurements and voltage measurements but they are spelled out clearly.   A bit of effort went into coming up with a way to set the bias and balance without an oscilloscope, signal generator, and dummy load and it seems to be working well.
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stone_of_tone
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Re: Zkit60 Introduction
Reply #10 - 01/06/19 at 19:05:00
 
Rules me out Grin

I'm just a worker bee assembly DC to AC Inverter's. Now, being a super drone making Boards at Seagate. Keeps me busy/I like it cause I get a 4 day weekend and a 3 day weekend the next!

I digress.....

Love this Amp and I bet it sounds good. The cost to have it made and shipped to TX is fair. Cool dank.

Donnie, glad I blew the dust off this Thread....go for it!
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Room Treats-M.Green & mine
Sony TPort
Illuminati D60
Shunyata Z-Alpha DigPcord
Decware ZDSD DAC
Kimber Select KS1030
XLOProPcord
Decware ZMA/25th Mods
Kimber Select KS6063
Acoustic Zen Adagio/Modified
Kimber PK10 Palladian from wall
to PS Audio P3
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