I have been working on the ultimate version of the CCS-X-BOSOZ.
The idea behind is to go all the way with the best in components and thermal management.
This means thermally coupled fets, the best caps available in all positions and CLC filter before the regulated PSU.
I have one small problem though, as I have designed the PCB in PCB123, so I need a little help to be able to post the layout, as I don't have a scanner (need to print and scan)...anyone??
The file is the left half of the amp layout, the right half is simply mirrored on a copymachine.
What do you think?
Magura
The idea behind is to go all the way with the best in components and thermal management.
This means thermally coupled fets, the best caps available in all positions and CLC filter before the regulated PSU.
I have one small problem though, as I have designed the PCB in PCB123, so I need a little help to be able to post the layout, as I don't have a scanner (need to print and scan)...anyone??
The file is the left half of the amp layout, the right half is simply mirrored on a copymachine.
What do you think?
Magura
Attachments
kilowattski said:Why not ground plane the board and have all the analog grounds meet at one point on the board?
Would a star ground be better than just copper all over the component side as ground plane?
Magura
It is based on this schematic,
http://web.vip.hr/pcb-design.vip/xccs-bls.html
Added PTFE film/foil bypass caps and moved the ground to the component side of the board. Series output resistor changed to 50R.
680R power resistors made of 4 *2K7 metal film 3W in parallel.
Magura
http://web.vip.hr/pcb-design.vip/xccs-bls.html
Added PTFE film/foil bypass caps and moved the ground to the component side of the board. Series output resistor changed to 50R.
680R power resistors made of 4 *2K7 metal film 3W in parallel.
Magura
Nice layout, Magura. I was thinking of using PTFE caps for bypassing all the electrolytics on the X-CCS BosoZ too
Looks really good with provision for them on the board.
Maybe you want to make more room for the 10uF outputcap?
You might want to go crazy and mount some wild outputcap
Who knows?
I guess you will be using the circuit with this beauty
:
http://www.briangt.com/gallery/magura-40stepattenuator
Steen
Maybe you want to make more room for the 10uF outputcap?
You might want to go crazy and mount some wild outputcap
Who knows?
I guess you will be using the circuit with this beauty
http://www.briangt.com/gallery/magura-40stepattenuator
Steen
Magura,
I was not able to open the circuit file you offered on the first post.
But based on the circuit offered later, from Kristijan I guess, it seems that there is no need for two CCS.
Some time ago I did discuss the point with Kristijan and he agreed on this point and I can see others on this forum using only one CCS.
Hope to hear from you on the outcome of this pre
I was not able to open the circuit file you offered on the first post.
But based on the circuit offered later, from Kristijan I guess, it seems that there is no need for two CCS.
Some time ago I did discuss the point with Kristijan and he agreed on this point and I can see others on this forum using only one CCS.
Hope to hear from you on the outcome of this pre
Yep, quite impressiveBTW, your switch for the attenuator is just fantastic. You are able to outdo any commercial offering, including the Master!!!
Steen.
kilowattski said:
Thanks for the critics, the link is very informative and should be read by anyone.
This is the kind of errors I was hoping to catch by posting about this project.
Magurs
apassgear said:Magura,
I was not able to open the circuit file you offered on the first post.
Here is the PDF version of the board, well the left half, the right half is simply a mirror of the left half.
Magura
Attachments
apassgear said:Magura,
But based on the circuit offered later, from Kristijan I guess, it seems that there is no need for two CCS.
Some time ago I did discuss the point with Kristijan and he agreed on this point and I can see others on this forum using only one CCS.
Could you be more specific? cons/pros?
Magura
steenoe said:
Maybe you want to make more room for the 10uF outputcap?
You might want to go crazy and mount some wild outputcap![]()
Who knows?
I guess you will be using the circuit with this beauty:
http://www.briangt.com/gallery/magura-40stepattenuator
Steen![]()
I have thought of the option of making more space for the output cap, it could be done reasonably simple on this layout.....think I will do so.
Well, a very nice option for the output cap would be this one:
http://www.briangt.com/gallery/magura/PICT0001
Unfortuantely I think I will not be allowed to have a fridge sized pre-amp in the living room
...and yes the attenuator is made for a BOSOZ, how did you figure that
Magura
Those Siemens MKK caps might be the perfect match for that preamp. Some might say 167uF is overkill, but what.....? 167uF did I really get that right?? I would go for itWell, a very nice option for the output cap would be this one:
But whatever, a 30uF mkp should do the trick, I guess. Looking at your Son of Zen chassis, you won't have a mini component stereo anyway, so what is wrong with a "slightly" big preamp?
All the designs seen lately, only have one CCS. Also the X2 has one per channel, so it might do
Steen.
Well, the guy is crazy
Nothing less
Take a look at this chassis comming to life!!!
Looking forward to see the end result, he obviously dosn't shy away from anything!!
http://www.briangt.com/gallery/magura-casting
Steen

Take a look at this chassis comming to life!!!
Looking forward to see the end result, he obviously dosn't shy away from anything!!
http://www.briangt.com/gallery/magura-casting
Steen
Hi Magura
The only benefit from two CCS' is the possibility to adjust gain on the fly using just one resistor/attenuator between the sources of the diffpair, just like in Passlabs Aleph P preamps.
http://www.passlabs.com/downloads/old product/apserv17.pdf
Best regards Henrik
The only benefit from two CCS' is the possibility to adjust gain on the fly using just one resistor/attenuator between the sources of the diffpair, just like in Passlabs Aleph P preamps.
http://www.passlabs.com/downloads/old product/apserv17.pdf
Best regards Henrik
jh6you said:
Just my humble opinion.
Regards
jH
Is it something you can back up with math? It should be possible to calculate..no??
I have film caps up to 200uF, so I am free to choose, I just thought that 10uF was the ideal compromise ??
Magura
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