Krell KSA 50 PCB

[jacco vermeulen]

Take eis on you head, guys.

I have eis in my ears, on my head, i am even sitting on it, Upiepa Lordship.
Its not working, what now ?

 

[Upupa Epops]

Hard to say, Majesty. Maybe change the brain ?

 

[jacco vermeulen]

Not again ?

 

[K-amps]

I have eis in my ears, on my head, i am even sitting on it, Upiepa Lordship.
Its not working, what now ?

LOL! Jacco, without your translations, I am usually scratching my head as far as Ur-plodship goes.

 

[K-amps]

Re: schematic Krell ksa50

Hello All,

I am intersted too in building this Krell clone, but can anybody link me to the last schematic of this krell (ksa50)?

Go here it has everything, http://www.delta-audio.com/Krell-Clone.htm

for the rest goto the Wiki...


JAN! Can you put a link of the Wiki on your website as well please? It iwll be helpful.

 

[still4given]

Maybe one of you guys could put the link to the wiki in your signature until this thing finishes.

Blessings, Terry

 

[pinkmouse]

Lost track a bit, but this is a correct schematic. Some part numbers may be different to the boards, but that will be updated.

 

[loek]

IIRC the KSA-50 had one, the KSA-100 had two of the same

Hi K-amps, I have ksa50 pictures with 2 transformers, but maybe they are wrong.
Loek

 

[pinkmouse]

I must admit, I always thought the KSA50 were full dual mono, rather than sharing a traffo.

 

[kensetsu]

Hi,

Forgive my stupidity, but can I use your boards to build a KSA100?

Thansk, Nick

I must admit, I always thought the KSA50 were full dual mono, rather than sharing a traffo.

 

[pinkmouse]

Yes, you just need to add more output boards/devices. A couple of resistor values might need to be changed as well, to cope with the higher rails, IIRC, the KSA100 ran at about 47V.

 

[K-amps]

Re: IIRC the KSA-50 had one, the KSA-100 had two of the same

Hi K-amps, I have ksa50 pictures with 2 transformers, but maybe they are wrong.
Loek

I should have said 800VA in total and 2 400VA toroids... sorry!

 

[K-amps]

Yes, you just need to add more output boards/devices. A couple of resistor values might need to be changed as well, to cope with the higher rails, IIRC, the KSA100 ran at about 47V.

I measured +/- 53vdc on my KSA-100 (Mk.II). Biased at 120watts pure class-A, clipping was also at 120 watts or so.

 

[pinkmouse]

IIRinCorrectly then!

 

[pinkmouse]

Just found this really useful temperature calculator on the Analog website:

http://www.analog.com/Analog_Root/s...ols/interactiveTools/powertemp/powertemp.html

 

[steenoe]

Hmmm, I didnt read this mileage heavy thread all the way through, so sorry if this is answered before How do you guys intend to design the output boards? How many transistors on each? and not less important, how much space between each transistor? I think it would be a good idea, not to mount them too closely

Steen

 

[pinkmouse]

How many transistors on each? and not less important, how much space between each transistor? I think it would be a good idea, not to mount them too closely

Definitely!

http://www.diyaudio.com/forums/showthread.php?postid=644000#post644000

The boards are 100mm wide, the largest I could make them in the free version of Eagle

 

[kensetsu]

Hi,

We're getting the ball rolling on a "Cardas Group Buy" Last year the response was good and we got some pretty good prices. The Group Buy tread can be found at: http://www.diyaudio.com/forums/showthread.php?s=&threadid=49013
Apparently, the manufacturer didn't want anyone posting the price online. So all prices were given directly to people in the group individually. Anyway, we started a wiki at http://www.diyaudio.com/wiki/index.php?page=3rd+Annual+Cardas+Bulk+Purchase

Hopefully, we'll be able to generate enough interest that we can all save a lot of money. By the way, does anyone know how I can put a link in a post. I'm still pretty new to this site and don't know much about how to post.

Thanks, Nick

Definitely!

http://www.diyaudio.com/forums/showthread.php?postid=644000#post644000

The boards are 100mm wide, the largest I could make them in the free version of Eagle

http://www.diyaudio.com/wiki/index.php?page=3rd+Annual+Cardas+Bulk+Purchase

 

[steenoe]

The boards are 100mm wide, the largest I could make them in the free version of Eagle

The outputboards look great I guess two sets per channel are needed for a KSA100?

Steen.

 

[pinkmouse]

Steenoe,

That's the plan!

Kensetsu,

I have no problems with the cross-post to your GB, but I am curious about the need to quote a post of mine on a completely different subject!