diy JAM Rattler possible?

[slowpogo]

I briefly owned a JAM Rattler (damn you, covid) and I loved it.

How does it differ from the classic Rat circuit? can any old Rat pcb be modded to be similar?

[Marcos - Munky]

Without a schematic and/or good pics, it's hard to tell. But:

https://www.jampedals.com/wp-content/uploads/2019/12/RT-PCB-GrayBG.jpg
https://www.electrosmash.com/images/tech/pro-co-rat/pro-co-rat-schematic-parts.jpg

As far as I can see, R4, R5, C5 and C6 are the same value. I can see a 1nF, 2 22nF and a 3n3 caps, which also matches with the rat schematic. 2 si diodes and a led, that may be for clipping or just to indicate the board is being powered. 2 1uF caps, a black one that may be C7 in the schematic and a big blue cap that's probably for power filtering (C13 in the schematic). Same IC, 2 ceramic caps near the IC (C3 and C4, can't read the values). The ceramic at the right side is for power filtering, C12 in the schematic. I'm too lazy to check the resistors values, and I don't like to read color bands on blue resistors, the color bands often blends with the blue color and create a totally different color.

Looks like a stock Rat. But we can't be really sure, unless we discover the value of the ceramic caps and pots.

[cab42]

Waking up this old thread as I found some information in this tear down video of the Rattler I just found searching for something else.

https://m.youtube.com/watch?v=lla8kf7DKaQ&t=1s

The pots are 100ka for gain and level and 100kc for tone.

In a comment for the video Jam Pedals confirms that the led on the board is for asymmetrical clipping