Small Stone (LM13600 or 13700)

carlozsulca12 · Post by **carlozsulca12** » 05 Nov 2020, 12:16

Hello, I was reviewing the old thread of the small stone, I got to build it but it did not work and some photos of how to install the switch are no longer available.
Has anyone the schematic or any information on this pedal?
These are the files that I was able to collect from that thread, credits to those who correspond

https://drive.google.com/drive/folders/ ... sp=sharing

Post by **The G** » 05 Nov 2020, 13:56

The EHX - Small Stone ( LM13600 ) thread in the Circuit Analysis > Modern Stompbox Effects (1975 - ...) forum has a schematic.

For a more modern approach you could study Build Your Own Clone (BYOC)'s Phase Royal OTA Phaser Module, which contains only the effect circuit and needs the Phase Royal, which has the box, inputs, power supply, switching and wiring. Their PDF documentation is quite good.

Scruffie · Post by **Scruffie** » 05 Nov 2020, 14:40

Perhaps not...

carlozsulca12 · Post by **carlozsulca12** » 06 Nov 2020, 11:10

The G wrote: ↑05 Nov 2020, 13:56 The EHX - Small Stone ( LM13600 ) thread in the Circuit Analysis > Modern Stompbox Effects (1975 - ...) forum has a schematic.

For a more modern approach you could study Build Your Own Clone (BYOC)'s Phase Royal OTA Phaser Module, which contains only the effect circuit and needs the Phase Royal, which has the box, inputs, power supply, switching and wiring. Their PDF documentation is quite good.

I just saw the documentation you sent and it does not show me the installation of the color switch

plush · Post by **plush** » 06 Nov 2020, 12:23

carlozsulca12 wrote: ↑06 Nov 2020, 11:10
I just saw the documentation you sent and it does not show me the installation of the color switch

You did not specify which switch you want to install initially.

And, yes, installation of color switch is shown on the schematic mentioned above.

carlozsulca12 · Post by **carlozsulca12** » 06 Nov 2020, 13:16

plush wrote: ↑06 Nov 2020, 12:23
carlozsulca12 wrote: ↑06 Nov 2020, 11:10
I just saw the documentation you sent and it does not show me the installation of the color switch
You did not specify which switch you want to install initially.

And, yes, installation of color switch is shown on the schematic mentioned above.

yes i was referring to the color switch i installed the switch as shown in that handmade schematic but it didn't work, and some of the old thread also mentioned that it didn't work for them

Post by **The G** » 06 Nov 2020, 21:27

I found some info regarding the Color switch in GeneralGuitarGadgets' documentation.
They are talking about the CA3094 version instead of the LM13600 version, but the color switch circuit seems similar. Anyway, it seems to me that all the Color switch does is feeding a fraction of the output signal into the circuit input.