PROJECT begins: bass preamp - diyAudio
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Old 27th July 2006, 10:27 PM   #1
diyAudio Member
 
Join Date: Jan 2005
Location: Argentina
Arrow PROJECT begins: bass preamp

Well I decided to start building the preamp stage of the mesa/boogie bass 400 amp.

schematics:
http://img115.imageshack.us/img115/9294/preampav1.gif

Parts
Click the image to open in full size.

I dont trust on the small caps. The guy at the shop told me that will suport 500v, but... I will try to find some others!! what do you think?

The output stage will be a lm3886 gainclone, maybe 2 or 3 with diferent speakers.

http://img291.imageshack.us/img291/7704/dsc09418hv7.jpg

(4x 150VA 12v transformers to make 2x24v 600VA + 8 MUR840 fast diodes + 30000uF each rail )

Why not a tube output? because I dont have such big output "iron" =(

maybe in the future I will build one with this output tubes

http://img105.imageshack.us/img105/3092/dsc03587vi2.jpg


Any advice for my project is welcome
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Old 17th October 2006, 02:59 PM   #2
cpasco is offline cpasco  Brazil
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Join Date: Sep 2006
Default Power Transformer

What´s the power transformer used in these project?
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Old 17th October 2006, 03:36 PM   #3
diyAudio Member
 
Join Date: Jan 2005
Location: Argentina
Default Re: Power Transformer

Quote:
Originally posted by cpasco
What´s the power transformer used in these project?

Hi!!! I used that transf. because I had it from another project.. maybe I will buy a new one, smaller.

cheers
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