Just did. I know at least a few have built this on here. Looks to be part of a voltage divider, but if I need to adjust the value to reach a bias point, why not a trimmer? There is one already one on the board for thatWeird. Maybe it means "do not". DLP usually means "do not populate".
Can you email deadendfx?
Not just on the schem, but the board itself has a spot for it. Meh.Why put it on the schematic only to omit it? Strange indeed!
Well, I could understand that if it's a board used for similar builds it would be logical to note on the schematic not to populateNot just on the schem, but the board itself has a spot for it. Meh.
It is a deadend fx project so there’s that.It must be a huge pedal if R44 is one metre long.
For the reference of the group, DNL= do not load= omit
Ha. Leaving my mark on the interwebs. Def worse ways to do it I guess. Good luck on the build, it’s a beast for sure. I think I got the bulk of the parts from Tayda, but I had to get the giant radial electros from mouser as well as a few of the ICs. One “gotcha”, the 6 LEDs on the board aren’t really a bypass indicator, but do let you know when you are triggering the envelope. That’s how the original gets the butterfly to light up. Mine are not visible from the outsideThanks for taking the time to post this. I'm gathering parts for “The Thing” now.
Googl search for this “DNL resistor” brings up this thread first.
…the 6 LEDs on the board aren’t really a bypass indicator, but do let you know when you are triggering the envelope.
I did post up a build report out there a while ago. I will say I need to track down some “oddities”. Mainly 2 things, I get a lot of whine/noise out of mine in bypass, it changes timbre based on the position of the morph switch. Kind of annoying, might be related to the expression jack. Secondly, my envelope does not seem to be super reactive. I have attempted to bias based on the build doc, but I cannot get my voltage to go below 6.36v. Not terribly off the 6.18-6.2v recommended starting point and considering you further turn the trimmer based on strumming to get the LEDs to react (which mine do) I guess it’s working as expected, but doesn’t sound quite the same as the demos and there is very little change from morph on or off. I used a vtl5c9, but might try switching for the NSL32sr3 since an nsl was in the original.Ah, cool. Thanks for the tip!
I'll arrange the LEDs to be visible from the outside somehow.
Let us know how yours turns out!
Didn’t sweat the odd resistor values too much that 1ohm difference in conventional pedal building doesn’t equate to a huge difference in functionality (that said I am not an EE so depending on what that resistor is dictating I suppose it could theoretically make a difference, meh). For all we know, that may have been an oddity in tolerance to the specimen that was traced. To be honest, I would stick with the pot position as advertised since you WILL have to use that size box. Note that the PCB absolutely fills the enclosure corner to cornerI like your purple with sparkle finish thingee! It's inspiring me to push forward with a build that, frankly, I have a bad feeling about.
(Build report link for future travelers.)
I just placed a Mouser order for all those oddball resistor values (2Ω, 390k, 910Ω, 11k5, etc.) That's the stuff that makes me a little nervous. It's weird that it calls for both a 22k resistor and a 22k1 resistor. So I ordered all the values at 1% tolerance just in case there's something necessary about this extreme level of specificity.
Masochistically, I'm considering doing off-board pots to mimic the original: 3 large pots in the top row and 3 small pots in the 2nd row.
I predict yours will be fixed with a proper NSL32-r3. Those reissue Xvive vactrols have dorked-up a number of builds by being notoriously out-of-spec.
I think some PCB makers probably do that to try and avoid conflicts concerning direct cloning. sort of in the same way you would use an interchangeable dual opamp instead of the original one. Again, not being an EE, there MAY be a cumulative effect of that 2ohm in addition to other resistance down the line, but does seem like an insignificant value.I feel that too. Probably won't make a difference.
It's dumb that I ordered both 22k and 22k1. Because later I discovered a bag of 22k. And 3 of them measure at 22k1 anyway. So thats's 20 resistors I might never use on order.
Even those 2Ω resistors. Initially, I was glad I ordered them at 1% tolerance, because whoever heard of a 2Ω being specified in a stompbox? Must be some magic voodoo. Looking at the schem, they sit between 9v power and the power pins on each IC. WTF. Probably the same effect as just using a wire jumper.
All that said, I'm glad when PCB designers like Robert and DeadEndFX stick with the original design and leave the modding up to the builder. At least one PCB provider routinely changes input value caps to what he thinks makes more sense. And I don't believe you can just make changes by looking at the schematic without hearing the result first. Maybe that's just me.