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post #9541 of 9594
Quote:
 And here's a dynalo to match the DAC above

Nice build  00940!

 

When I am allowed a tiny bit of nitpicking I would redo the spaghetti wiring... 

;)

post #9542 of 9594

Here's my ODA!

 

Check out.....

 

http://www.head-fi.org/t/719611/objective-desktop-amp-a-version-from-agdr#post_10570300

 

Its what an ODA might have been!!

 

Alex

 

 

post #9543 of 9594

@RudeWolf: nice and compact  :-)  What knob is that ?

 

 

 

 

Quote:

Originally Posted by stixx View Post
 

Nice build  00940!

 

When I am allowed a tiny bit of nitpicking I would redo the spaghetti wiring... 

;)

 

Thanks.  Yes, the wiring could be a bit tidier  :o but I swear it looks much worse in picture than in real life.

post #9544 of 9594

Got it on fleabay for not that many monies. 

post #9545 of 9594

Front Panel on still needs labeling.....ODA.

 

 

Alex

post #9546 of 9594

This is not so much of a build as a re-build...at least it's music related.

 

I got this Korg M1 for $30 in non-working condition and re-built it.

Replaced all the tactile switches, re-soldered all the i/o

connectors, replaced the back-up battery and reloaded the sound

banks. Works and looks as good as new now.

 

post #9547 of 9594

modified singlepower squarewave

removed coupling caps and replaced with op servo

cmp3.10.3.1Lq4 0xa362b87a

post #9548 of 9594

Just completed my CK2III build.  Sounds fantastic.

 

 

Thanks for looking.

Me

post #9549 of 9594

Nice build musky. I know you built an EHHA not too long ago, which do you like better?

post #9550 of 9594

Please don't think this is a cop out.  Before the CK2III my best sounding builds were my M3 and the  EHHA (rev. a) with the M3 just slightly better over all.  The M3 seemed to be a bit quicker and better on complicated tracks.  The EHHA seemed to have the edge on female voices and was a bit smoother.. The differences are so slight that another listener may have another opinion.  The CK2III doesn't seem to have quite the speed or resolution as the M3 has.  Female voices are excellent but misses some of the smoothness the EHHA has.  Again, the differences are so slight, another listener might have a different opinion.  I would have to rate the CK2III and the EHHA as being equals but with slightly different presentations. One thing to consider is that I found my Beyer Dt 880's (600 ohm) sounded slightly better on the CK than on the EHHA.  My Senn HD 600's sound great on both.

 

If you are thinking of building one of the two, I would recommend the CK2III over the EHHA for a number of reasons.  It is an easier build, the only problem I had was setting the bias.  Took me a couple of days before I was satisfied. The EHHA, depending on how you case it, can be a challenge to wire neatly and properly, lots of wires.  The CK a cheaper build, none of the parts were expensive.  Tubes for the EHHA can range from moderate to expensive.  Also, I like the fact that the CK is desk top sized, where as the EHHA is in a rack.  Being more portable, means that I will probably use it more.

 

I only have about 3 hrs listening time on the CK,  given more time and a refresher with the EHHA, my impressions may change.

 

Me

post #9551 of 9594

Musky thanks for your thoughts. I know it can be hard to put impressions to words. I often have difficulty with this.

 

I'm actually building an EHHA Rev A as I write this. I'm going to socket R11, R13 and R14. Don't think I need to socket R10. I figure this will allow me to tailor the sound. I'm a big fan of Alex's designs having built a few CTHs and listened to his other amps. I know the wiring is the biggest challenge so I'm in for a treat. Thus far I've read that it is on par DIY-wise with the B2 amp. I've only heard one so we'll find out how they compare.

 

I've also at some point want to build a CK2III, which coincidentally was co-designed by AC as well. Other than that my DIY references are the CTH, The Wire designed by OPC over at diyaudio, and the O2 with it's new booster board designed by AGDR. The booster board really kicks the O2 up a notch.

 

Before I can even get into the CK2III, I have to finish the EHHA and also have the Krell KSA-5 Klone PCB sitting in my closet.

post #9552 of 9594

Mullet, we must think alike.  I have a KSA5 populated with the passive parts.  One of the transistors has been back ordered, so I'm waiting on those before I do some rough matching and installing. The power supply is finished and measures well. (I have a few extra power supply boards for sale if you need one) I'm also working on the Wire.  Have the  power supply and amp boards populated.  Kind of lucked out on this one as I am going to use the same transformer/wall wort that I made for the CK.  I haven't listened to it yet but I have ran some square, sine, and triangular waves through it at various frequencies and they look good on my scope.  Going to box it up the same as my CK2III  Unfortunately, I have another project or 2 before that happens.

 

Me

post #9553 of 9594
What transistor r u missing? smily_headphones1.gif
post #9554 of 9594
Quote:
Originally Posted by muskyhuntr View Post
 

Mullet, we must think alike.  I have a KSA5 populated with the passive parts.  One of the transistors has been back ordered, so I'm waiting on those before I do some rough matching and installing. The power supply is finished and measures well. (I have a few extra power supply boards for sale if you need one) I'm also working on the Wire.  Have the  power supply and amp boards populated.  Kind of lucked out on this one as I am going to use the same transformer/wall wort that I made for the CK.  I haven't listened to it yet but I have ran some square, sine, and triangular waves through it at various frequencies and they look good on my scope.  Going to box it up the same as my CK2III  Unfortunately, I have another project or 2 before that happens.

 

Me

If you are missing the MJF15031G like most people, you can order them directly from ON Semiconductor through their website.  That is what I did.  I also have a KSA5 in progress 

post #9555 of 9594

Anyone have a Mouser / Digikey BOM they want to share for the KSA5 Klone?

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