moding pedals

[prioni200]

I'm building pedals on my own most from tonepad.Most are like the originals and maybe better.My last built is mxr phase 45.I made some mods i found in the Web but i dont know how to set up vibe switch.Does anyone know how?

[lefort_1]

Can you point to a reference/schematic for what you are trying to accomplish?

If you are looing to get a univibe-like output from a phase 45 circuit, you'll have to supply a very non-phase-45 LFO to the phase ladder.

Basically, you'll have to think about implementing a second LFO and choose between the original or the univibe one.

 

Some folks may chime in stating that a univibe has mojo-laden LDRs in it's circuitry, but they are not actually essential to the univibe sound.

The LDRs are a slightly non-linear, photo-reactive resistor element. The LAMP is far more non-linear in response to input than the LDR's are. And the univibe LFO waveform is definitely non-sinusoidal... BUT using a standard FET-implementation, one can reverse-engineer an LFO that will give a very convincing univibe-type variance in the filter-ladder 'biasing'. But it's easier for people to say the LDR's are special and therefore essential to the function, even tho they are not.