Dead End FX Turbotrem (Lovetone Wobulator clone)... extra stomp switch?

[slowpogo]

I'm building the Turbotrem, which has a third foot switch in the middle, where the Lovetone Wobulator only has a foot switch for left and right LFOs.

I'm guessing the middle switch is a "master bypass" but there's nothing in the build doc about this. Can anyone confirm the purpose of this middle switch, and if it's a master bypass is that really necessary? Would it be possible to omit the middle switch and wire those pads in an "always on" configuration, then just engage the left/right LFOs as needed?

https://drive.google.com/file/d/1zfFb6p8sl1gLMdpkSlTrNNS-i0e7dZRp/view

[GGBB]

My guess is that it's a phase switch for the right channel. But that build document leaves a lot to the imagination.

[Govmnt_Lacky]

My guess is that it's a phase switch for the right channel. But that build document leaves a lot to the imagination.

Correct! The stomp replaces the 'later-added' phase inversion switch on the originals. It puts the right channel out-of-phase with the left channel.

[slowpogo]

Awesome, thanks folks!

[slowpogo]

Unsure if I should start a new thread or not...the Turbotrem is up and running.  The only issue is a clock ticking sound when LFO 1 rate is at 3 o'clock and above. LFO2 has no such ticking at any speed.  Any ideas what could be causing the ticking and how to fix it? 

My general impressions otherwise of the Turbotrem/Wobulator...it seems best appreciated in a stereo setup, so far. In a mono setup the Dual Trem mode is the clear standout. You can get some great sounds from lush and beautiful to more trippy effects, which few if any other pedals are capable of.  When I use it with my Rubberneck analog delay, the possibilities are vast. The other modes (in mono) feel more like subtle variations on the standard Fender tremolo sound.  I realized quickly that in mono you should keep both LFOs engaged all the time, pretty much, unless you're in Dual Trem. They seem additive and with only one engaged (in mono) the depth is pretty flat. With both engaged you get a nice deep swing.

But in stereo, the other modes come alive. The "Vibrato" mode is misleading, as the pitch modulation is extremely subtle, but it's a pretty sound.  I'm planning to experiment with my E. Nigma (Lovetone Flange clone), maybe putting the Turbotrem in its FX loop.  I imagine great sorcery is possible by feeding the Wobulator into a stereo phaser.

I may try to put up a quick demo on Youtube, as there are only a few and they don't seem to be in stereo.

[iainpunk]

My guess is that it's a phase switch for the right channel. But that build document leaves a lot to the imagination.

Correct! The stomp replaces the 'later-added' phase inversion switch on the originals. It puts the right channel out-of-phase with the left channel.

does the Audio go out of phase or the LFO? i can understand the LFO but the audio... in a trem circuit??

[Govmnt_Lacky]

does the Audio go out of phase or the LFO? i can understand the LFO but the audio... in a trem circuit??

The stomp switch reverses the polarity of the Right channel output transformer so, I am "assuming" it changes the phase of the audio.

[slowpogo]

The center switch

Correct! The stomp replaces the 'later-added' phase inversion switch on the originals. It puts the right channel out-of-phase with the left channel.

I can confirm this is correct. In mono, or in a modest stereo setup like mine, it mostly just thins the sound out, which is fine. It's like another tonal option and could be useful with humbuckers.

But in a live performance situation where the speakers are far apart I can imagine the phase switch being pretty dramatic, especially on the Panner setting.