This is the standard Disaster Transport Jr, with the tails mod, and another that I just found that adds a kind of chorus effect to the delay, with just an additional resistor.
A Disaster Transport layout seems fitting, as there's been widespread flooding where I live, so kind of appropriate for the weather.
Here's the link to the chorus mod by DeadAstronaut, which includes a sound sample.
EARTHQUAKER DEVICES DISASTER TRANSPORT JR - VERO LAYOUT WITH MODS
Looks like a trimmer might be needed for the chorus mod that uses the 1M resistor due to some variations in the PT2399 builds. See the discussion in the provided link above.
ReplyDeleteTrue - I tend to breadboard and then drop in a value that works. I'll post another layout with a trimmer, as there's enough room on that corner.
DeleteHi! I'm going to build this layout, I think the tails/chorus mods are nice additions. What would be the correct way to wire this layout? I'm confused with the board in/out.
ReplyDeleteOut goes directly to the output jack, as this is buffered bypass.
DeleteThanks! I build it but have problems, when is engaged I have sound but no effect and after a while I can hear a pulse sound which interacts with the time pot and increases as I turn up (clockwise) the control which is the inverse of what it should be (I think). I check values, cuts, polarity, bridges, etc. Tried with another 2399 (tl072 too) and same behavior.
DeleteHere a the voltages, pt2933 have odd values.
TL072
4.24
4.26
4.16
0
4.24
4.25
4.25
8.48
PT2399
4.53
0.36
0
0
0
0.38
0
3.7
3.11
0.36
0.38
0.38
0.38
0.38
0.38
0.38
Any idea what it could be or where to find? Thanks in advance
That’s a bit annoying. Can you send photos to guitarverop2p (at) gmail.com and I’ll take a look. the voltages on the PT2399 look wrong.
DeleteDo you have an audio probe to check the signal flow?
Photos sent, I have never done an audio test a few years ago I built some pedals successfully but I don't have much experience. I can build an audio probe cable but I would not know how to follow the signal path correctly.
Delete