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Old 28th November 2011, 07:13 PM   #1531
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LC you are a master in amp ingeniering .....but a master in.......teasing too......

Marc
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Last edited by Idefixes; 28th November 2011 at 07:25 PM.
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Old 28th November 2011, 07:23 PM   #1532
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Quote:
Originally Posted by tinitus View Post


120mm fits perfekt in a modu 4U/300 with 165mm internal height, giving a nice chunky look
and those heatsink should make it indestructable in any load
It can be nicely installed in 3HU (132 mm) as side external heatsinks as well. 120mm x 170 mm SSA BIGBT HP PCB plus 400VA/120 mm (diameter) x 80 mm toroidal transformer, fits perfectly on a 132 mm x 300 mm x 40 mm Fischer heatsink as compact all-in-one amplifier module.

Last edited by Lazy Cat; 28th November 2011 at 07:28 PM.
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Old 28th November 2011, 07:33 PM   #1533
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by Lazy Cat View Post
... and just for a comparison, the one (too big for me) who's gonna be developed further by Alex. I wonder mhmm
Try to get you solderiron down between the caps to solder the power transistors/mosfets!

I go for Alex... Sorry Lazy cat
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Old 28th November 2011, 07:52 PM   #1534
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OK as you wish, but all the bigs caps are soldered at the end of construction, when all other components are already installed. All under PCB BJT's must be mechanically fixed to flat firm surface and than soldered to PCB, after low profile components (diodes, LEDs resistors, etc.). SSA "construction work" (installation) manual will follow.

It all depends on priorties one demands to follow. Major one ahead of this design here is to maintain high bandwidth results from protoboard measurements. It will be PITA to get there but anyway ...

P.S. This will be double sided PCB and big caps are 50 mm height.

Last edited by Lazy Cat; 28th November 2011 at 08:02 PM.
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Old 28th November 2011, 08:38 PM   #1535
alex mm is offline alex mm  Europe
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...... Andrej can you show as the layout of yours ? I can
Attached Images
File Type: jpg SSA BIGBT HP PCB NEW LAYOUT color.jpg (871.6 KB, 462 views)
File Type: jpg SSA BIGBT HP PCB NEW LAYOUT photo.jpg (668.4 KB, 423 views)
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Old 28th November 2011, 08:38 PM   #1536
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Quote:
Originally Posted by Idefixes View Post
LC you are a master in amp ingeniering .....but a master in.......teasing too......

Marc
Tnx hehehe I know ... the more fun the better results
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Old 28th November 2011, 08:44 PM   #1537
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Quote:
Originally Posted by alex mm View Post
...... Andrej can you show as the layout of yours ? I can
Ooooh nice try Alex, outputs in the middle, splendid

But my demand is max. PCB dimensions of 120 mm x 170 mm because of the standard heatsink size 300 mm and beside PCB also to accomodate 400VA transformer on it.
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Old 28th November 2011, 08:51 PM   #1538
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by Lazy Cat View Post
It can be nicely installed in 3HU (132 mm) as side external heatsinks as well.
ah, ok, I didnt know this

though, seems there are still room fore 'interpretations'

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
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Old 28th November 2011, 08:53 PM   #1539
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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
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Last edited by Idefixes; 28th November 2011 at 08:55 PM.
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Old 28th November 2011, 09:11 PM   #1540
sonnya is offline sonnya  Denmark
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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.
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