Bosoz in progress

Idefixes · 22nd December 2003, 08:03 AM

2 Months ago, after un discution with a friend of mine i decided to build with his help a Bosoz to drive my DIY-amp (in construction to). The Amp will be connected later to 2 Back Horn speakers (with Fostex drivers).

The first i made is reading the Nelson Pass PDF concerning the Bosoz as all topics i can find on diy audio to.
Than i begun to drawing on my computer some schemes from it while my friend build my the 2 Pcb : power supply and main board (both are modified to own BC056 and munforf Mcap capa)

I purchase to Digikey teh parts i need. Mundorf and BC056 came for germany and france as the tansfomater.

The mainbord and the power supply board without Mcap capa.

The main board with Mcap soldered

This the past 2 week i began the housing

I needed to modify the implantation because i wanted to have the same cable length for +/-/ground. The two board will be separated with a 3mm thick steel plate.

The next step his finishing the house by varnishing the wood front and rear faces........

Marc

Netlist · 22nd December 2003, 07:30 PM

Fantastic work Marc

It's as Zen as Zen can be. Well almost, we had the lightbulbs.

Keep us informed with nice pictures.
What power amp will you build?

/Hugo

Idefixes · 22nd December 2003, 08:38 PM

Quote:

Originally posted by Netlist
Fantastic work Marc

What power amp will you build?

/Hugo

Thanks Hugo.
The first step for amplification is a 5x50W Zenquito evolution from Jean Marc Plantefève ("the french Nelson Pass). It's a class AB amp. base on Hitachi transistor. Here are somme pics of my amp in build process (It's not yet finished) :

The Pcb :

The capa are BC C154 22000µF/40V, i have 14 of them in the amp

Marc

Netlist · 23rd December 2003, 08:12 AM

It all looks very neat.
Did you see there are some threads discussing the Zenquito on this forum too?
They are current feedback amps, no?
I tried something for the AlephX with CF but due to lack of time and knowledge it has to rest for a while.

/Hugo

Idefixes · 23rd December 2003, 08:34 AM

Quote:

Originally posted by Netlist
It all looks very neat.
Did you see there are some threads discussing the Zenquito on this forum too?
They are current feedback amps, no?
I tried something for the AlephX with CF but due to lack of time and knowledge it has to rest for a while.

/Hugo

No i didn't see. The zenquito is the first step of amp building. After a few month it will be operating only on my Home cinema amp through preout. I am actually studiing a Aleph X (45-50w) version to work with bosoz.

Marc

Idefixes · 4th January 2004, 09:36 PM

I continued my work on my Bosoz. I rebuilt the front and the back face plate with exotic wood

Marc

joensd · 4th January 2004, 09:45 PM

Congrats! That´s definitely one of the most beautiful and tasteful designed amps around here!
PCB artwork is great as well.
Did you do it with Eagle?
And if so, would you mind sharing the eagle files with us?

Cheers
Jens

Idefixes · 4th January 2004, 09:54 PM

Quote:

Originally posted by joensd
Congrats! That´s definitely one of the most beautiful and tasteful designed amps around here!
PCB artwork is great as well.
Did you do it with Eagle?
And if so, would you mind sharing the eagle files with us?

Cheers
Jens

Thanks
The PCB design was made bay a freind of mine effectivly with eagle. My friend's name on DIYAUDIO is PsyKoK. Ask him he has all the files and had do a really nice work on these bosoz PCB.

Marc

promitheus · 4th January 2004, 11:11 PM

Very good work.
I really like your cases with the wood and everything.
what is that small blue transformer behind the toroid for in the preamp?

Really cool .

jleaman · 4th January 2004, 11:33 PM

ideaFixes

I have downloaded all your pictures and will be putting them into my Gallery on my main page. Hope you don't mind.. if any one else wants to host there pictures please let me know..

thanks..

22nd December 2003, 08:03 AM	#1
Idefixes diyAudio Member Join Date: Dec 2003 Location: Mulhouse - Alsace	Bosoz in progress 2 Months ago, after un discution with a friend of mine i decided to build with his help a Bosoz to drive my DIY-amp (in construction to). The Amp will be connected later to 2 Back Horn speakers (with Fostex drivers). The first i made is reading the Nelson Pass PDF concerning the Bosoz as all topics i can find on diy audio to. Than i begun to drawing on my computer some schemes from it while my friend build my the 2 Pcb : power supply and main board (both are modified to own BC056 and munforf Mcap capa) I purchase to Digikey teh parts i need. Mundorf and BC056 came for germany and france as the tansfomater. The mainbord and the power supply board without Mcap capa. The main board with Mcap soldered This the past 2 week i began the housing I needed to modify the implantation because i wanted to have the same cable length for +/-/ground. The two board will be separated with a 3mm thick steel plate. The next step his finishing the house by varnishing the wood front and rear faces........ Marc

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22nd December 2003, 07:30 PM	#2
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	Fantastic work Marc It's as Zen as Zen can be. Well almost, we had the lightbulbs. Keep us informed with nice pictures. What power amp will you build? /Hugo

23rd December 2003, 08:12 AM	#4
Netlist diyAudio Moderator Emeritus Join Date: Jan 2003	It all looks very neat. Did you see there are some threads discussing the Zenquito on this forum too? They are current feedback amps, no? I tried something for the AlephX with CF but due to lack of time and knowledge it has to rest for a while. /Hugo

4th January 2004, 09:36 PM	#6
Idefixes diyAudio Member Join Date: Dec 2003 Location: Mulhouse - Alsace	I continued my work on my Bosoz. I rebuilt the front and the back face plate with exotic wood Marc

4th January 2004, 09:45 PM	#7
joensd diyAudio Member Join Date: Dec 2001 Location: Germany	Congrats! That´s definitely one of the most beautiful and tasteful designed amps around here! PCB artwork is great as well. Did you do it with Eagle? And if so, would you mind sharing the eagle files with us? Cheers Jens

4th January 2004, 11:11 PM	#9
promitheus diyAudio Member Join Date: Jan 2001 Location: Germany	Very good work. I really like your cases with the wood and everything. what is that small blue transformer behind the toroid for in the preamp? Really cool .

4th January 2004, 11:33 PM	#10
jleaman Banned Join Date: Apr 2002	ideaFixes I have downloaded all your pictures and will be putting them into my Gallery on my main page. Hope you don't mind.. if any one else wants to host there pictures please let me know.. thanks..