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Hi, I'm building a project that I found on sabrotone.com.
The schematic says I need a 750 pF, anyway in Germany 750 pF is kind of impossible to find.
The closest replacement I found was 820 pF, do you think it would make such a big difference?
Do you have an idea where I could possibly find a 750 pF?

Thanks a lot to all of you

Yes, I have Seen lots of People doing it, although I'm not the soldering pro, so I doubt to be able to solder such tiny things.
That's basically the problem, and the reason cause I exclude the smd j201.
If someone would sell them already soldered, it would be fine, but I couldn't find any of them.
Does really not exist a transistor, that could replace the j 201?
Thanks anyway

Hi, I'm trying to build the mark IV from http://sabrotone.com/ .
I already built it on breadboard with 2n5457, and it sounded pretty good.
But the original shematic is with j201, and I heard it should even have higher gain as 2n5457.
Since I'm trying to get the closest sound as possible to the j201, and they are not easy to find in Germany, and quite expensive, what would be the best substitutes?

Ok thanks a lot!
about the noise, it's not that much, in clean you don't even notice it, it's a kind of "Zipper" noise that you hear only when you play.
I now the pt2399 has 16 pins, but I don't think that measuring on other pins would be that good, they seem to be all in or out for signal lp filter

Since the bias trimmer doesn't change much, I was asking myself, what exactly is the 2n5457 supposed to do here? maybe this could be the problem

I measured the voltages at the pt2399:
1 - 5.0V
2 - 2.53V
3 - 0V
4 - 0V
6 - 2.5V

I Finally built the Cavedweller 2, I love the sound, but I have some issues.
1) When I plug in the power, the Led Diode makes a flash, very fast.
Even when the pedal isn't turned on, is it normal?
2) The pedal makes more noise than I expected, when I'm in clean I don't notice it at all, but when I play on the dirty channel, I hear a disturbing noise only when I play, it's a kind of whistle.
3) When my delay is at maximum and I increase the RPT, it makes a kind of Larsen effect, and doesn't stop until I decrease it.
Could it be caused by the PT2399? maybe it's damaged.
4) when I increase the bias trimmer for the 2n5457, I don't notice any difference at all, except when it's turned all the way up, then I don't get a clear sound.

In my opinion the problem is caused by the pt2399, wich could be damaged, what do you think?
Any help would be appreciated.

On request I could even send some photos or if possible video

I finally boxed it up, love the sound.
The problem was the voltage regulator 78L05.
I just replaced it and now it works

Hey,
just built the Cave Dweller 2, I tried it before on breadboard and it worked, but then I soldered it to the board and now it doesn't work.
It's strange, because the signal goes trough, and I hear it, I'm even able to change the volume with the volume Trimmer, this means that the signal actually goes trough, but it's unchanged, it comes out unaltered.
Any ideas what the Problem could be?
I'm pretty sure to have soldered everything right, could it be caused by the IC? or the transistor?
Any help would be appreciated.