freestompboxes.org

I've populated and used a 100K for repeats (cos I ran out of 50K) and it's working perfectly... and the 100K also goes into feedback nutso zone if wanted.. I also used a 5K1 instead of a 5K (suspect it was supposed to be 5K1 anyway).
some of the tracks are reeeal close to each other at the hole spots, so be wary of undesired bridging.. I had to pay close attention to each solder and had to run a screw driver between a couple of them cos I don't have any flux .
also, the 100uF cap is pretty close to the 33R (from the 9V) too ,but it kinda fits if you use a 16V cap.

so.. consider this verified as working
is it verified as the mad prof one? no idea.

will house it up and see how it goes into my real rig.

Nice!

2 quick questions. Will this fit in a 1590B? And how "hissy" are the repeats when set to a longer delay time?

pretty sure if it'll fit in a 1590A it will in a 1590B, but the B is a bit more shallow so I'm not 100% on that.
as for hissy repeats? I've tested it into a SS 2w test amp that is using a buggered old car speaker so it's not exactly ideal for testing 'nuances'.. so can't really comment.. will hopefully have it in a housing and into my proper amp in the next week or so.

and here's my build

certainly not a project for beginners; plenty of places where the tracks shorted out when soldering and had to reaaaallly pay attention to that and remove some snot, and scrape the screwdriver through a few spots. great feeling getting it going, but tricky finneky crap to get the bits soldered in.

recommendation from me is to use monolithic multilayer caps rather than anything else. I squeezed in some mylar ones in there, but box caps would have no show.


outs:


guts: tighter than a nuns nasty in there
[note, the electro in the bottom right corner, I rotated and drilled a new earth hole for, that way I was able to get a taller (but skinnier) cap in there so I could bend it over to take up less room hightwise]


got a piece of transparency in there (not shown) too so as to insulate the board and any shortable parts from the housing.

real nice tight fit wicked achievement if you ask me

or may I quote you here "tighter than a nuns nasty in there"

clips please

Great stuff rocklander! What are the jack sockets you're using? Never seen that type before and they look fairly compact.

mysticwhiskey wrote:Great stuff rocklander! What are the jack sockets you're using? Never seen that type before and they look fairly compact.

thanks, yeah, saw them at farnell/element14 a while ago and took a gamble on them, and they're great. sturdy as, and prolly round 75% the real estate of a switchcraft.
they're "lumberg KLBM 3"
http://www.lumberg.com/main/common/pro_ ... name=KLBM3

in this part of the world it looks like farnell are the only ones who can get it, but there seem to be other distributors internationally. good price, good size and strong.. thumbs up for them

This is an unverified 1590B layout with board mounted pots. The transfer image is 2.05" W x 2.085" H (it's 600DPI). DIY/non-commercial use only, please

Hi madbean,

don't understand what was your intention connecting the delay pot to pin 4 of the pt - as in every schematic of a pt2399 based delay this is always not connected. Otherwise than that, I would say it's verified as I build it and I got a working delay. But I connected the delay pot as it is e.g. in a rebote delay. Works fine. Nice trails I have to say.

Helge

Helge,

It's connected to digital ground which is itself connected to analog ground via a tiny resistor. I don't know if this is how the actual DBD is set up or not, but it's how I've been doing most of my delays recently.

madbean wrote:Helge,

It's connected to digital ground which is itself connected to analog ground via a tiny resistor. I don't know if this is how the actual DBD is set up or not, but it's how I've been doing most of my delays recently.

Ok, got it. Does make sense. Should have thought twice.
So: Verified!

verified again ;0
i think i might have a really noisy batch of 2399's cause after about halfway up the delay pot I'm getting some crackles, sounds fantastic otherwise

sprayfe wrote:verified again ;0
i think i might have a really noisy batch of 2399's cause after about halfway up the delay pot I'm getting some crackles, sounds fantastic otherwise

Nah, in my experience that's normal with the pt. Everything above 300ms starts to sound crackly and you can hear some clocknoise. It was never designed to give much longer delay times as far as I know.

Nice layout MB! I have an etched rebote on my desk, I'm excited to compare the two and see how much better this one sounds with mods.

madbean wrote:This is an unverified 1590B layout with board mounted pots. The transfer image is 2.05" W x 2.085" H (it's 600DPI). DIY/non-commercial use only, please

Hi, I've made your version today... COMPLETELY WORKS FINE! Thanks a lot, it's a very cool delay.

Visualdistortion wrote:

madbean wrote:This is an unverified 1590B layout with board mounted pots. The transfer image is 2.05" W x 2.085" H (it's 600DPI). DIY/non-commercial use only, please

Hi, I've made your version today... COMPLETELY WORKS FINE! Thanks a lot, it's a very cool delay.

is this clean delay above 300ms?

Just built one of these guys and its pretty cool... BUT when I play it through a cranked high gain amp I get some faint motor boating sound linked to the level pot. When I play it with less gain its fine, but again, with lots of amp gain it rumbles.

Any ideas?

madbean wrote:This is an unverified 1590B layout with board mounted pots. The transfer image is 2.05" W x 2.085" H (it's 600DPI). DIY/non-commercial use only, please

Verified! Thanks madbean. Sounds a lot nicer than the Rebote but still has the PT2399 crackle at longer delay times. I'll put this into my Rebote enclosure as its definitely an upgrade.

Does anyone need in the PCB for this project?
Not quite to this, so do not break. I add some resistors from 3,5 legs, it eliminates the noise (brum-brum-brum) well when working chip, but you can close it by returning to the original.
$6 for PCB + $5 shipping anywhere in the world. You can write me in private, if you need it.

Hi Gents congratulations for your work on this

Madbean's layout verified here as well, troubleshooting came to an end yesterday when i discovered a missing solder joint, urghhhh. It's working perfectly now, sounds fantastic and is surprisingly quiet

Just to add that indeed there seems to be a noisy, nearly-useless PT2399 batch. i was lucky enough to buy a second chip locally while troubleshooting, just in case. both are branded as 'PTC', but the printing on them was a bit different.

The first one generated some loud crackling noise with the delay pot above 12 o'clock, which only got louder while turning the pot even further, in essence trashing the pedal on longer delay times

BUT, the second ones maxes out the delay without any noise at all. Not sure of the max. delay time i'm getting here but it does seem to work perfectly in all positions