Hi all,
i wanted this one for a long time. so first of all thanks to mostrummer for the schematic. i tried to trace this one from the available images prior to him posting it. of course, i couldnt do it completely, but everything i got (~60%) agrees with his schematic. now i try to do a one sided pcb for easy home production. my experience with eagle is only rudimentary at this point so i came here to ask for some advice. i hope someone can help me.
first i redid mostrummers schematic (its attached)... for practise purpose and to have it in eagle. i used the parts library provided by gaussmarkov on his site. i still have some questions regarding the schematic.
all the capacitators C12, C13, C15, C16, C18 and for the reference voltage C17 seem to be the small yellow/orange ones. can anyone explain to me, why that many and if its important to use them in the place they are? reagarding the potential, one could put all of the first five in parallel to D7 and C10. is it important to put them at the point they are? similary for C11 and C17. couldnt one just connect their ground (in the schematic) and use only one ground reference?
a second thing i wondered is about the correctness of the values. i finally found a high res gut-shot searching via google (attached too, hope that is ok, if not, i will remove it). some values seem to differ slightly, which i dont think is that crucial, but for example the one left to the tone pot for me looks like orange, orange... and if im not mistaken there isnt such a resistor in the schematic. (although this image is supposed to be version 2.0. did you use the old one for the schematic, mostrummer?). can anyone confirm the values or is this the 220 Ohm one, looking different in the image due to light effects. another thing are the diodes. it seems, D4 is different than D1-D3. can anyone confirm or falsify that?
my last questions are also about the aps. what type are the yellow filter caps. i thing the question came up earlier but wasnt answered. for the normal film caps, id like to use the panasonic caps. since they are all available here in germany, id like to ask, if anyone knows, which types are used, polyester, polypropylene, metalized versions? if one builds a clone, why not as exact as possible since availability of the parts is no problem
my others questions are more a call for help regarding the layout and routing of the board. i intend to get a one-sided board that fits into a hammond 1590 typ b enclosure (like the original?). i just did a first layout (board file attached). the idea, counterclockwise, input buffer bottom left, then first stage and feedbackloop top left, second stage with tone control topo right and output buffer bottom left. the auto routing gives me a board with 2 extra wires, i could live with that. my problem now: many of my previous builds where rebuilds like for example the dr boogey. with such pedals, a good routing is extremely important. somewhere i read guidlines like close supply rails , stuff that must not be in proximity etc. my question is, is it necessary to do so here too? i think my current layout, besides not being small enough has many points that can be improved. i hope that someone might have a look at it and give me some advice what to change and perhaps some tricks worth knowing (btw, i also reead the special eagle threads, but im a much better learner with an actual case
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thanks for your help in advance, i know this are alot of questions and some will take time to answer... and since this is my first post thanks to the community in general, i think without this side in particular i might have never started building fxs.
I was just looking at the schematic, but now looking at that layout again I see what you mean. Thanks again.
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