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Old 27th April 2006, 04:20 PM   #11
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I donīt know if it is possible to mount the PCB on top because the output cap is too big in diameter.
That means the board must be lifted at least 30mm.
I dont know if it possible to make the PCB even smaller.
It would have to be 10cm long.
Thats not possible I think.

Do you have any other ideas?
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Old 1st May 2006, 06:52 PM   #12
Boban is offline Boban  Canada
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Hi Promitheus,

just a suggestion:

Instead of DIP switches why don't you use ZIF sockets, something like this: http://rocky.digikey.com/WebLib/3M/W...9-00-0602J.jpg so we can experiment with the loading and the resistor brand.

Thx
Boban
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Old 2nd May 2006, 09:28 AM   #13
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pixpop did you check the board size?
do you htink it will fit ok on top of the Pearl or should something be changed?
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Old 2nd May 2006, 02:48 PM   #14
pixpop is offline pixpop  United States
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Promitheus,

It looks like it will just fit. The height is very tight, but I think it will work. If necessary, I can mount the 3300 caps on an angle.

Are there enough people interested to make it worthwhile making the boards?
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Old 2nd May 2006, 02:59 PM   #15
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How are you going to mount it on the Pearl board and at what points.

There is interest for the PCBs, I am still waiting for more people to order them.
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Old 2nd May 2006, 03:23 PM   #16
pixpop is offline pixpop  United States
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I'll mount it above the input section of the Pearl, with the long edge parallel to the long edge of the Pearl.

I'll extend the corner mounting post of the Pearl to the appropriate height and mount the corner hole of the MC board on that. For the other corners, I'm not sure. If possible, I will drill a hole in the Pearl PCB and screw a standoff there. But if there are tracks in the way, then I can glue a nylon standoff on top of the Pearl at that location.

Do you have a way of combining the corner of the Pearl etch pattern with the MC board as a single image so the alignment can be checked better? I don't think I have tools to do this. Or maybe combine the two component overlays into a single image to see what conflicts with what, if you line up the two corner holes. Do you know what I mean?

Well actually, if you can send them both as .jpg files at the same scale, I can do the overlay with photoshop and check it that way.

Also a new question: The MC output is now coming out close to both the MC and MM inputs. Is that going to affect stability of the MC stage, or even the MM stage?
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Old 2nd May 2006, 03:46 PM   #17
pixpop is offline pixpop  United States
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The height of the output cap on the Pearl is not a problem (for me, anyway). It's the height of the 3300 uF caps on the MC board that's very tight.
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Old 2nd May 2006, 04:18 PM   #18
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They are as long as the other ones on the Pearl boards.
Well you cant do much about that.

How are you going to mount the board?
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Old 2nd May 2006, 05:27 PM   #19
pixpop is offline pixpop  United States
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See my previous post #16
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Old 3rd May 2006, 03:16 PM   #20
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I want to say that I am organizing a last Pearl group buy.
If anybody wants to participate please send me an Email.

Also final MC Pre PCBs and Parts are decided.
Parts KIT costs 42,00 Euro and PCBs 22,00 Euro.
Complete KIT 64,00 Euro.
Parts are the same quality like the Pearl.
Matched 2SK170BL quads.
Please come in contact if you want to participate.
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