Krell KSA 100mkII Clone

[xslavic]

we can do it,i have some gerbers & need someon to correct errors ?ther is anyone that can modify gerber files i mean good with P-cad or altium designer ? & make a design for 6 pair for output stage

 

[spurlte]

Are the PCBs for 2 SoftStart and 2 Output DC Sence still available? Spurlte, Chicago.

 

[Fix]

I still have PCB's for the DC Protection and Softstart, PM me for more details.

 

[Flodstroem]

Hi Fix!
A question regarding the power transformer: Is it the H1000-031F you have been using for your KSA 100mkII clone ?
If yes, do you know if they still are available? From who?

 

[xslavic]

hi,i recommend to Buy the wire and build your own transformer
its better,you wont have to deal with ..bad people

 

[xslavic]

how can i get in posetion of the softstart pcb ?
thanks

 

[spurlte]

Is it really possible to make your own transformer?

 

[Flodstroem]

hi,i recommend to Buy the wire and build your own transformer
its better,you wont have to deal with ..bad people

Yes, I could do that if............
I had the winding machine
Had the time to do it
And I only needed one transformer (I need 6-8 transformers)

 

[spurlte]

I have a electric motor step-control. I was thinking to slow down my drill-press enough to wind spool of wire. But, don't you need to wind completely inside and out circled plates? My Gosh, that would save tons of money even if copper is gold's little brother. I will wikipedia "transformers." Wonder if you can make toroidal trannies? I would put a bearing on the otherside of what even I would use as a spool to wind the wire on. So the drill press on one end and the bearing on the drill press vise. Yes, I am new to building power supplies.

 

[Flodstroem]

Hmmmmmm...........
Spurite, her you can see how a toroidal winding machine looks like, pretty complicated I must say

Its for sale here:
300mmOD large core Toroidal Transformer Winding Machine | eBay

 

[spurlte]

Winding Machine

Hmmmmmmm, is correct!!!!!!!!
You guys are out of my league.

 

[czolgista778]

Guys, sorry for making an off topic, I want to buy an original Krell but something in this ad just isn't right to me: Marktplaats.nl > krell KSA 100 - Audio, Tv en Foto - Versterkers en Receivers
The seller says it's the Mk2 version but it i've looked at some pics posted on page 10-15 and it looks like he is selling a KSA100Mk1 with Mk2 cover, am I right?

Is this verison any better than an old unbalanced version of the KSA80?

 

[AndrewT]

A close up and detailed pic of the back may enlighten.

 

[czolgista778]

I asked the seller for a pic of the back. I hope to get one soon.

 

[czolgista778]

Well, I got the answer that i should go search on google for the pics....
Somehow, if you look closely at the pics you will see that even the 3 screws from the logo are missing...

 

[Jozua]

Hi

I am certain it is a Mk2. The Mk1 did not have the speaker relays and soft-start relay which this unit clearly has.

Jozua

 

[xslavic]

Hi,if someone finds the easy formula for toroids contact me,send a mail -- i will try it manually,just for fun .. i dont have time for library ,thanks

 

[xslavic]

maybe added later,or a clone ,but i dont like those transistors
mine will have 2sa1943 2sc5200

 

[neychi]

Hi

I am certain it is a Mk2. The Mk1 did not have the speaker relays and soft-start relay which this unit clearly has.

Jozua

...and mosfets wich this amplifier has. MkI version did not have them.

 

[czolgista778]

Look, real pro's Thanks guys!
Does it look original to you and is this the version to have?