Thanks to m-Kresol for making the boards available at OSHPark. Felix's layout makes use of the newer BTDR-3 bricks that have adjustable decay. I've built this pedal twice now, the first time using the older brick which has a bit more modulation going on. I did tinker around with the resistors in the dry path of the circuit to get more dirt from the gain control.
Here's a quick phone recording from earlier today:
https://www.youtube.com/watch?v=y0xo2dmnpZU
That came out great! Sounds awesome.
Can you share what changes you made for it to get a bit dirtier? I have this built up but have not boxed it up yet since it just doesn't get dirty no matter how hard I push it with my Jazzmaster. I get a bit of grit with my SG humbuckers but I don't use the SG as a primary player.
I would love to get results like yours.
Cody
Thanks Cody.
Sure, these are the resistors I changed. Refer to the schematic in the build doc at OSHPark (Rubidium Reverb):
R5: 47k (this is the one that gives you more gain in the dry path)
R16: 5k6 (this is for the sunshine part of the reverb)
I tried a B2M pot for the gain but went back to a 1M log pot. Seems a bit more useful to me.
I used a TL074 instead of the more obscure TLC27... I started out with the latter but I couldn't hear any difference between them, and as I'm selling this build, opted for the op amp that's easier to find.
Hope this helps :-)
Quote from: Addy Bart on November 10, 2016, 02:32:49 AM
Thanks Cody.
Sure, these are the resistors I changed. Refer to the schematic in the build doc at OSHPark (Rubidium Reverb):
R5: 47k (this is the one that gives you more gain in the dry path)
R16: 5k6 (this is for the sunshine part of the reverb)
I tried a B2M pot for the gain but went back to a 1M log pot. Seems a bit more useful to me.
I used a TL074 instead of the more obscure TLC27... I started out with the latter but I couldn't hear any difference between them, and as I'm selling this build, opted for the op amp that's easier to find.
Hope this helps :-)
Thanks a lot for taking the time to explain that. Really appreciate it. Now lets see if I can get to the bench tonight.
Cody
Sounds like a great circuit, and a nice pedal ! Do you have a gut pic? :)
Hi addy,
great build and great demo. Is it cool if I implement a link to your demo in the build doc?
Do you plan on doing any graphics? and of course, I demand a gut shot too ;)
Cody, I'll go over the part values again today to see if BOM and schematic values match up. I've built two of these now and they sounded identical and I thought that they could be quite dirty, but maybe that's just my taste/opinion, idk.
Sure thing Felix :-)
I think this one will be without graphics as it's for a friend and he wants to keep the price down (ha).
Here's a couple of better photos. I still need to solder in the LED!
thanks. I updated the doc, also realized that the title was wrong. must have overwritten it while doing the dubnium drive doc.
is this one of the new polished/buffed tayda enclosures or did you do it yourself?
Well spotted! I tried out the electric buffer that I'd bought for cleaning the plexiglass on the balcony. It was a bit of a rush job but it looks like it works... next time I'll put some proper effort in to getting a nice shine.
a bit late to the party but I have some problems. I've tested the kresol pcb with two different BTDR-3 bricks and at high decay settings there always is a annoying (reverbed)-hum in the background. With with the older bricks and these PCBs this problem does not occur.
Nice build! The demo sounds great.
Quote from: stringsthings on June 27, 2018, 10:31:11 AM
Nice build! The demo sounds great.
Cheers! I made another one a while back. I took out the 470pF cap in the gain part of the circuit, brightening the fuzz.
and no problems with noise addy bart when using the BTDR-3?
Quote from: KT on June 28, 2018, 07:20:30 AM
and no problems with noise addy bart when using the BTDR-3?
I haven't had the problems you describe. But I used a BTDR-3 that I ordered a long time ago from Small Bear.
I'm not sure what to suggest... maybe contact the vendor to see if this is a common problem with the new bricks. Hope you manage to fix it... those things aren't cheap!
That does sound really good! Great pedal.