Custom Switcher

[jkokura]

Had a client who wanted a custom switching unit for their rig.

Basic setup runs like this: Buffered Input (Split to Tuner Out) > Effects Loop > Amp Switcher (Amp 1/Amp 2 with A/B)

So, you can run your guitar in, have a dedicated Tuner out, Run an effects loop, run your signal with quiet switching (no ground issues) to two amps, and the second amp output is actually A/B so you can run to two channels on the same amp (client's amp pair is an Egnater and a Vox AC30 which he wants to run either of the two channels on).



Glamour Shot.



And the Guts.



Originally I had 3 PCBs made up, but the A/B one I used a bi-colour LED, and I misunderstood/couldn't find the correct LED - all of them seemed to work backwards to what I needed (i.e. common cathode not anode... I think). So, there's a PCB missing, but I still have a couple copies of the switcher and buffered effects loop with dedicated Tuner out.

Jacob

[spaceboss]

Looks really cool. Love the transformers. (What function do they serve?)

[jkokura]

Looks really cool. Love the transformers. (What function do they serve?)

Decoupling ground. With a Simple A/B switch for switching between amps, it's very easy to get pops due to grounding issues. The Transformers isolate each output for the A/B switch, so with this setup you can get on/off for amp A, and on/off for amp B. You can also set it up for A/B or on/off and A/B. It's not a new design. It's based of R.G's work, which is what the BYOC switcher is based on as well.

Jacob

[timbo_93631]

that is some nice work Jacob!

[nzCdog]

Great build in and out...I love the stamp lettering, where did you get those??

[wolfingsworth]

Just looking at the outside, one would expect to see a jumble of wires inside, not the case. Those guts are as clean as could be. Nice work!

[pickdropper]

Yeah, I am not sure I've ever seen a switcher with wiring that clean.  Looks great.

[studiodunn]

That looks great. That is so clean considering the functions being performed. Nice work as always.

[jkokura]

Thanks guys! I'm still bummed I had to do the A/B switch without a PCB, but sometimes you just can't help it.

Jacob