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krell ksa5 klone


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My Krell:        

Got it cased.  Pretty standard.  I apologize for the power switch--I couldn't resist.  

I completed the full modification (output stage and front end) on both channels and listened to the amp briefly. The headphones were Grado GS1000 and Sennheiser HD595, the 8ohm speaker were B&W 60

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my guess is that the output transistors and the 2 ohm resistors are toast.

 

I replace the pot with fixe resistor to test, and everything run fine ;D

 

Put sine wave in the input and get an nice sine wave at the output !! Need just to wait to get the right pot...

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http://gilmore.chem.northwestern.edu/ksa5klone.jpg

 

the fat version of the pot fits perfectly.

 

I figure about 5 hours of build time total if I had all the parts

ready to go  without having to start and stop waiting for

multiple orders.

Edited by kevin gilmore
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Yeah, the B-job. It's better, you know that.

Hell, it will only cost you a buck more. What are you waiting for? Dew eet!

 

Or look at it this way - would you buy a crappy Escort when you got the dosh to throw down on a GT? I thought so.

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Yeah, the B-job. It's better, you know that.

Hell, it will only cost you a buck more. What are you waiting for? Dew eet!

 

Or look at it this way - would you buy a crappy Escort when you got the dosh to throw down on a GT? I thought so.

If the B-job makes the KSA5 Klone go better like the GT, then I am tempted to pay the extra few bucks. But I might come back and complain if my KSA5 ends up with the (reported) reliability of the GT ;D

 

Doesn't really matter which version you pick but it's normally good to go for the lowest noise. 

Excellent. Thanks.

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original power supply version of the krell ksa5 power supply

also suitable with lower voltages for the singlepower squarewave

the later version coming shortly

 

 

http://gilmore.chem.northwestern.edu/ksa5psorig.jpg

 

http://gilmore.chem.northwestern.edu/ksa5psorig.zip

 

 

and here is the alternate version of the krell ksa5 power supply

 

http://gilmore.chem.northwestern.edu/ksa5psg.jpg

 

http://gilmore.chem.northwestern.edu/ksa5psg.zip

Edited by kevin gilmore
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Only problem, finding some HV ones that are not for TV use and with horrible Cob....  :(

 

Edit.  And who ever thought it was a good idea to call the new ones TO-3P needs to be taken out back and shot. 

Edited by spritzer
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  • 2 weeks later...

original power supply version of the krell ksa5 power supply

also suitable with lower voltages for the singlepower squarewave

the later version coming shortly

 

 

http://gilmore.chem.northwestern.edu/ksa5psorig.jpg

 

http://gilmore.chem.northwestern.edu/ksa5psorig.zip

 

 

and here is the alternate version of the krell ksa5 power supply

 

http://gilmore.chem.northwestern.edu/ksa5psg.jpg

 

http://gilmore.chem.northwestern.edu/ksa5psg.zip

 

Silkscreen on the original board = I think R4 is 562 not 750.

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Has someone finish and listening to his KSA-5 ?
I just finished mine, and I'm very disappointed :- 
Sound very "thin" and clip very quickly.... Not exactly what I was waiting for !

 

Edit : I use a Beyerdynamic T1, which is not very difficult to drive...

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Has someone finish and listening to his KSA-5 ?

I just finished mine, and I'm very disappointed :- 

Sound very "thin" and clip very quickly.... Not exactly what I was waiting for !

 

Edit : I use a Beyerdynamic T1, which is not very difficult to drive...

 

 My origional KSA5v with the blackgates has never shown any signs of clipping even when driving my k1000s at full volume( it drives them to a reasonable listening level at full volume ,but definetly could use more power then the krell can produce) but it is very clean sounding with no clipping at all. No way would I call the Krell thin sounding.

 I have found the T1 to sound best with tube amps,I have never tried the T1 with it. I do own A Blackdragon  recabled T5p I will have to give a listen with the Krell when I get a chance.

 I also find the T5p to be picky with some portable amps but sounds great directly out of My Dell laptop listening to CDs go figure.

Edited by bozebuttons
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