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Old 22nd February 2012, 06:36 PM   #521
labjr is offline labjr  United States
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I think vias should be avoided if possible unless a component lead is going through the hole. If unvoidable then maybe make a pad(or several for high current) on both sides to solder a piece of component leads through the hole.

Also consider making the traces wide as possible for high current paths. Providing it doesn't create another issue.
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Old 22nd February 2012, 06:39 PM   #522
CeeVee is offline CeeVee  Portugal
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Andy,

There is indeed a problem because r15 is a small resistor so via is small, but solution is simple:

Just run 5mm track from c10 all along R1-R7 same with track from C4....

resistors are soldered both sides....no more problem.
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Old 22nd February 2012, 06:45 PM   #523
Itsmee is offline Itsmee  England
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CeeVee, you beat me to it when I was looking for my earlier post

If you move the C4 to R1-7 track to the top of the resistors, that leaves a clear path to from the bottom of R1-7 to C10.
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Old 22nd February 2012, 06:50 PM   #524
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by UKToecutter View Post
Would you all like an alternative PSU?
I've no problem with that and I don't take it personal.
The PSU board is true to Nelson's schematic but I know alot of you plan to do your own whether they be CRC CC CLC is a matter of personal preference.
If there is a consensus I'm happy to accomodate.
Andy you have done a sterling job on the Amp boards...let's see what the global feeling is on an alternate big cap PSU board....i'll give you a hand if you need
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Old 22nd February 2012, 06:58 PM   #525
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Thanks CeeVee.
I'm back home Friday afternoon so it would be nice to finalise this weekend and place an order perhaps end of next week

I know that many have expressed and interest but I will canvas again in light of the new Input / Output stages for V3 and once we've finalised an alternative PSU.
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Old 22nd February 2012, 07:14 PM   #526
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Quote:
Originally Posted by CeeVee View Post
seems you did not like my comment, it was very much in favour of your approach....

I just limited myself to identifying differences!!!

no judgement of choices, each to his own ...but i would like fewer and bigger caps for a more compact PSU that is all.

I have a few of these caps ...enough for V2 which is what i am aiming for....
MY most sincere apolologies
I have misunderstod what you where saiing

I am Sorry

I tought that we where looking for a comon suply board for new Papa F5turbo

From that the misunderstanding
If you like screw mount capacitors there you have it.

Eswa 63 V and Rifas 40 V

one thing came to mind
There is going to be loads off current comming trouh the Caps and the CRC resistance is much lower on the Turbo if you looking at same riple figures that the F5 use to have CRCRC may be the way to do it
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Old 22nd February 2012, 07:21 PM   #527
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@uktoecutter:
no problem! its so great that you are doing all the planning for those PCB's.

THANK YOU (and all the others who are involved in this project!)
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Old 22nd February 2012, 08:05 PM   #528
rdk845 is offline rdk845  United States
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Quote:
Originally Posted by labjr View Post
All these options are very interesting. One could always build V3 with a point-to-point wired output stage. For those who don't want to there's output boards.
Good idea. I think it would be even better if the V3 output board can be broken into 4 mosfet stages, by having grooves accross them and solder holes for wiring between the mosfet stages. This way, heat sinks are not limited to the dimension, say 15 inch long by 8 inch high that current output board is designed for. One could use them with tower shaped sinks, square shaped sinks or whatever combination of sink they already have in their hands.

I think this would be quite critical for universal V3, because the cost and configuration of heat sinks would be arguably most important practical aspect for building V3.

Sure one could always p to p entire output stage, but it would be 32 mosfet stages for balanced V3. I would be much more comfortable with connecting those stages via 3 wires, rather than doing p to p all those stages.

Uktoecutter, could you please consider the above?

Last edited by rdk845; 22nd February 2012 at 08:13 PM.
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Old 22nd February 2012, 08:51 PM   #529
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Quote:
Originally Posted by rdk845 View Post
Good idea. I think it would be even better if the V3 output board can be broken into 4 mosfet stages, by having grooves accross them and solder holes for wiring between the mosfet stages. This way, heat sinks are not limited to the dimension, say 15 inch long by 8 inch high that current output board is designed for. One could use them with tower shaped sinks, square shaped sinks or whatever combination of sink they already have in their hands.

I think this would be quite critical for universal V3, because the cost and configuration of heat sinks would be arguably most important practical aspect for building V3.

Sure one could always p to p entire output stage, but it would be 32 mosfet stages for balanced V3. I would be much more comfortable with connecting those stages via 3 wires, rather than doing p to p all those stages.

Uktoecutter, could you please consider the above?
How about another board option comprising a single MOSFET / diode section with the option for a thyristor?
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Old 22nd February 2012, 08:53 PM   #530
CeeVee is offline CeeVee  Portugal
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Quote:
Originally Posted by Bksabath View Post
MY most sincere apolologies
I have misunderstod what you where saiing

I am Sorry

I tought that we where looking for a comon suply board for new Papa F5turbo

From that the misunderstanding
If you like screw mount capacitors there you have it.

Eswa 63 V and Rifas 40 V

one thing came to mind
There is going to be loads off current comming trouh the Caps and the CRC resistance is much lower on the Turbo if you looking at same riple figures that the F5 use to have CRCRC may be the way to do it
.....So it was you who cleaned out the stock at Audiocap Uk
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