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Old 22nd February 2012, 01:17 PM   #501
labjr is offline labjr  United States
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I think it's a great idea to have input and output boards which can be used for either V2 or V3
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Old 22nd February 2012, 02:20 PM   #502
sippy is offline sippy  United Kingdom
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Hey there,
I've cojitated over the board lay-out since the V3 1x front and 2x output drawings were posted......
V1 is basicly F5c from the store - wanna build one, buy boards from store, build amp, jack-up surply V and have sweet music and a slightly warmer listening room.
V2 is F5c with the extra doo-daa's - not much more requirement in the heat sinking/case enlargement side of things, more heat = better heating/drive ability.......
OR V2 with split input-output/s - makes it possible to upgrade to.........
V3...... definately an input board and split out-put device boards. In my head, V3 should be built as mono blocks, 50v or there about surply V and 3 or 4 devices is gonna need heat sinking that will impress any one, crank up to 75v surply V and we're in the realms of massiveness.......
And as Mr.Pass himself said 'DIY'ers are a fearless bunch'
Nice work on the board desighn Toecutter, I've saved the V3 layout just in case this arrangement does'nt go ahead - BUT if it does, I'd be interested in a stereo set of input/split outs
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Old 22nd February 2012, 02:26 PM   #503
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Sorry dudes no way I want to be spoil sport I would like to be really diplomatic
The supply board is a bit to complicated

I think toecutter is doing pretty good job but there are many ways to pluck a Duck.

I posted the lay out for how IMO capacitors board could be made simpler with less track lengths and such all is needed is the bit for the rectifiers (again I do not intend to but in see above)
Track thickness can be really large and different size capacitors just need extra pad on the Ground plane.

Low impedance and current caring capacity is really important here

To make it easy to see here is a couple of 3D views with copper poor areas and basic track

Another thing and reason why I did not put rectifiers there

I know Papa published the one with common secondary while F5 had split down to rectifiers and that normally (2 diode Bridges) is the preferred versions.

Do you want one as Turbo PSU or 2 As F5 PSU?
Attached Images
File Type: jpg CAP BOARDS 001.jpg (665.4 KB, 519 views)
File Type: jpg CAP BOARDS 002.jpg (988.4 KB, 493 views)
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Old 22nd February 2012, 02:26 PM   #504
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Quote:
Originally Posted by jacco vermeulen View Post
Would just require solder pads, not holes.
That is what I meant, my technical english needs improvement
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Old 22nd February 2012, 02:32 PM   #505
labjr is offline labjr  United States
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Quote:
Originally Posted by Bksabath View Post
Sorry dudes no way I want to be spoil sport I would like to be really diplomatic
The supply board is a bit to complicated

I think toecutter is doing pretty good job but there are many ways to pluck a Duck.

I posted the lay out for how IMO capacitors board could be made simpler with less track lengths and such all is needed is the bit for the rectifiers (again I do not intend to but in see above)
Track thickness can be really large and different size capacitors just need extra pad on the Ground plane.

Low impedance and current caring capacity is really important here

To make it easy to see here is a couple of 3D views with copper poor areas and basic track

Another thing and reason why I did not put rectifiers there

I know Papa published the one with common secondary while F5 had split down to rectifiers and that normally (2 diode Bridges) is the preferred versions.

Do you want one as Turbo PSU or 2 As F5 PSU?
I agree that trace thickness is important. Especially in the power supply board. More is better. I don't think it costs extra to leave more copper on the board. A universal board is good. Maybe the rectifiers could be off the board to cut down on size.
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Old 22nd February 2012, 02:34 PM   #506
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Quote:
Originally Posted by Horio View Post
Here is the data sheet:

Fukushima Ceramic Plate Resistors MPC74

The GB was for the straight type MPC74, which looks to have a lead spacing of 9mm with 0.8mm leads.
I have been using those on MY F5 sound realy good no inductive by design
handle a lot of power probably the best for this application.

If things get out of hand they breack quite well (open circuit) which is quite handy if one of the mosfets pop as 99% of the time that is a dead shorth.
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Old 22nd February 2012, 02:41 PM   #507
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Quote:
Originally Posted by labjr View Post
I agree that trace thickness is important. Especially in the power supply board. More is better. I don't think it costs extra to leave more copper on the board. A universal board is good. Maybe the rectifiers could be off the board to cut down on size.
Ok that is one comment
What obout the track rooting (again no ego involved here) would you think that 1 single straight track is beter than loads of track with loads of bends

Don't get me wrong bend and duble layers make it look pretty but I think we are not going to put one of those at the Biennale.

Cost wise one get charged by board size and number of holes.

It is actualy cheaper to leve as much cooper on the board as Acid get changed less often but you will get no discount for that.
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Old 22nd February 2012, 02:59 PM   #508
labjr is offline labjr  United States
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I would think that bends and corners aren't critical with heavy traces in a power supply, but I don't know for sure.

Probably more important where interference and oscillation can cause problems.
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Old 22nd February 2012, 04:04 PM   #509
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Try ground potential.
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The buck stops Here
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Old 22nd February 2012, 05:09 PM   #510
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Ok that is 2 comments and 49 view of the silly picture in less than 2 hours

camon dudes is your F5 in which ever flawor we working on.
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