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Old 28th November 2011, 10:34 PM   #1541
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Quote:
Originally Posted by tinitus View Post
as per the 3U 133mm rack size standard, modushop appear to measure their entire box brutto height, and thus internal height is only 120mm
but doesnt matter when there is a 4U
Now you know why PCB is 120 mm, notoriously standard dimension in pro-audio.
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Old 28th November 2011, 10:41 PM   #1542
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Quote:
Originally Posted by Idefixes View Post
ARGGGG double side pcb board....a pity to etch at house....so it seems that i need to spend many time on eagle for sigle side way.... with more room needed. LC i suppose that BIGBT HP in lowaer rail voltage count same parts number as your hightest version...only value changing inside????

Marc

Note : NJL4302DG arrived today so yet i have 5 couples NJL4281DG/4302DG for SSA_TT_35V
I am sorry for that my PCB version is inappropriate for you, but it is mine version and suited strictly to my needs and expectations. Schematic of it was published, so anyone can design a PCB exactly to his own taste, you're welcome too.
Yes, only the values will be recalculated later on.
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Old 28th November 2011, 10:50 PM   #1543
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Quote:
Originally Posted by sonnya View Post
It is only a suggestion. Move the el-caps a bit away and place polyprop caps close instead.
... place polyprop caps close instead.

Cannot do closer than 3 mm from rails split to the outputs.

Quote:
Originally Posted by sonnya View Post
El-caps does not go higher than a few hundred kilohertz. The film caps stretches to around a few megahertz.
mhhmm ... I wonder mhmm ... and mica to few hundreds ... mhmmm thanks anyway
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Old 28th November 2011, 11:17 PM   #1544
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by sonnya View Post
It is only a suggestion. Move the el-caps a bit away and place polyprop caps close instead.

El-caps does not go higher than a few hundred kilohertz. The film caps stretches to around a few megahertz.
Hugh found same thing on one of his amplifiers.

The big electro's can be some distance away. In my first amplifier I placed them all in the chasis and none on the amplifier board. With short distance wiring this works just fine. It keeps them away from the heat of the power devices too not to mention less mechanical stress if they aren't hanging sideways off a board.
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Old 29th November 2011, 06:26 AM   #1545
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Quote:
Originally Posted by Lazy Cat View Post
I am sorry for that my PCB version is inappropriate for you, but it is mine version and suited strictly to my needs and expectations. Schematic of it was published, so anyone can design a PCB exactly to his own taste, you're welcome too.
Yes, only the values will be recalculated later on.
Don't be sorry. The value recalculation to my 50/60V rail is more than i can askinng from you. As i am not able on electronic amp design....pcb board making, internal and external architecture/design is the way i made a DIY project mine. Than if some provide a fonctionnal schematic with my requierement i am more than happy.

Marc

Edit : I just look what sort of standart Pcb board are available and could match with the goal. There is a 150x200mm; i will try to do with this.
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Last edited by Idefixes; 29th November 2011 at 06:41 AM.
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Old 29th November 2011, 09:24 AM   #1546
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... and the components layout is about 95% finished. Some minor changes will take place on the way by routing the traces.

It is definitively not the PCB for the faint hearted DIY-ers.
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File Type: jpg SSA BIGBT HP PCB.jpg (617.1 KB, 551 views)
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Old 29th November 2011, 09:52 AM   #1547
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Any chance to listen this beast?
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Old 29th November 2011, 10:02 PM   #1548
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..... PCB ready, size 170 mm X 120 mm , but not symetrical layout
Alex.
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Old 29th November 2011, 10:07 PM   #1549
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hey, looking great

hmm, I wonder if it also would be a good realiable bassguitar power amp

why 100V caps ?
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Old 29th November 2011, 11:08 PM   #1550
Salas is online now Salas  Greece
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Andrej, what will be the 8 Ohm RMS power?
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