I've been thinking of a couple mods that could be done to the Ghost Echo. I don't know much about electronics, I've just built 4/5 pedals and modded a couple more, so I'm just gathering ideas from different readings over the internet!
1 - Shorter minimum delay time:
In order to reduce the minimum delay time, it'd be possible to replace R19 (1K from pin6 of the PT2399, in series with the attack pot) with a smaller value (100r) and add a latch up protection like on the Little Angel chorus circuit : http://jmkpcbs.com/wp-content/uploads/2 ... -Angel.pdf
(the whole part that goes out of pin6 of the PT2399). Except with the attack pot (10k, 20k for longer delay) in series with the 100r resistor.
I haven't tried it yet, but I don't see why it wouldn't work.
2. Tone control :
I'm wondering if the tone control from the Tenebrion/Box of Hall could work. https://dl.dropboxusercontent.com/u/285 ... ildDoc.pdf
In the Ghost Echo there's no resistor in series between BTDR pin5 and the depth pot, so I don't know if it should be added.
Since BTDR pin6 isn't connected, it'd be easy to just connect to lug3 of the depth pot through a pot (with a grounded cap from lug2), exactly like on the Tenebrion/Box of Hall tone section.
3. Decay control :
Just using the Ghost Echo layout/schematic with a BTDR-3H and adding a decay control should work, right? I don't think I'll do it cause I don't wan't to buy another brick, but if it was a new build it could be interesting!
Keep in mind I'm really just beginning in electronics, and merely following instructions so far, so those mods might not be possible or desirable!
If anyone has any idea about them, it would be greatly appreciated!