Pedal JHS Moonshine v2 - Help me

[Menotti]

Olá amigos, alguém já fez o pedal JHS moonshine v2?

Eu fiz, mas estou tendo alguns problemas com isso. O som está tocando, mas quando o som para, um apito soa ao fundo.

Verifiquei tudo, mas não consigo encontrar o problema. Alguém para me dar uma luz?

[jimilee]

Check your off board wiring, it sounds like your in and out are crossed. Is it an actual JHS pedal?

[Menotti]

It's a clone, I'm basing it on the following circuit:

https://dirtboxlayouts.blogspot.com/2020/12/jhs-moonshine-v2-overdrive.html?sc=1694815614163&m=1#c8146421177756381169

https://dirtboxlayouts.blogspot.com/2020/12/jhs-moonshine-v2-overdrive.html?sc=1694815614163&m=1#c8146421177756381169

[Menotti]

[mauman]

In some recent posts at Dirtbox Layouts, someone (maybe you?) said they had a similar problem, and IC3 (the charge pump) got hot.  If that's you, the 7660S could have been damaged, making it whistle.  You can check whether the whistle is coming from the charge pump by using an audio probe (go to https://aronnelson.com/diywiki/index.php?title=Debugging for instructions if you don't have one.)  If that's the source of the whistle, I would replace the 7660S (IC3) with a new one.   If that doesn't fix it, you can filter the charge pump DC output to prevent any noise from reaching the signal path, let us know if you need help with that.

[Menotti]

hello.  Yes, it was me.

I'm going to buy a new 7660S today as a replacement.  I'll comment later here if it worked.

Thanks for the tip about the audio probe, it will be very useful.