2 effects sharing same input, which input topology do I keep?

[momo]

Continuing on my Valvecaster/ booster effect, I decided that I would like to incorporate a modified Supreaux Deux circuit as it needs 18 v and I have it with the VC.
As you see they both have similar input circuitry.
I have a input cap switch with 3 values on that, this would go to Supreaux Deux and then to the BlackValve version of the VC. See the two layouts....
thanks!

[antonis]

I'm not sure for what you want to do but the two circuits (not layouts.. ) above are out of phase..
(big issue if they are mixed somehow..)

[momo]

Oh wow, OK thanks.
So here is the plan, maybe its a simple reply or not!..

Hang on...what if I had a Supreaux2 stand alone effect and I would send that to my VC, you saying that the signals would cancel out?
Like is that a thing where you can't plug a Sup2 into a VC?

Anyhow, here is the plan,
I would like the Sup2 as a front end for the VC, all sharing the same power and enclosure.
I won't have a bypass on the Sup as I would bias it so it can clean up if I want, that would go to the VC. I  already have 3 input caps on a switch, I would send that to the Sup input, then out of that into the VC.

[GibsonGM]

Supreax volume wiper to VC input, just that simple if you want to have them in series.    There are many 'mods' one could do here as well, such as a bypass switch to send the input directly to the VC without the supreaux.  A series connection is the most simple.      Both circuits are using the same power supply?

The phase issue of each stage inverting will not matter if they feed in cascade (one into the next).  It WOULD matter greatly if they were to be used in parallel with each other!   

[momo]

thanks, that makes sense.

The psu is a 14vdc 1A.
I used it on the VC breadboard .
The psu puts out 17.8v unloaded, I had that into a 12v regulator  and fed a Fetzer Valve and the BlackValve circuit. I was still getting 17v out of the psu.
So I'm thinking, that this 14v 1A transfo can handle what I want to do...

The Sup would be on a sub board and the VC will be point to point.

My biggest concern is the input cap on the Supreaux.
Like I mentioned before, I have a 3 cap switch at the input, so I'm thinking to ditch the first 1meg and 22n cap at the input of the Supreaux.

[momo]

   There are many 'mods' one could do here as well, such as a bypass switch to send the input directly to the VC without the supreaux. 

This could be a simple 2P2T right?

[GibsonGM]

It is ok to remove the Supreax input 1Meg and cap, replace with your switched cap there, yes...OR, do the switched cap at the VC input!  The choice is yours as long as the Supreax R2 and VC R1 are still there as they're involved with bias/input conditions.

The power supply is more than capable of supplying these, oh yes.

You can use a DPDT to do your bypassing, yes....many prefer a 3PDT so that you can also wire an indicator LED, tho.    Or do R.G. Keene's  "Millennium Bypass" to hack an LED onto a DPDT, if that's all you have!   

[antonis]

what if I had a Supreaux2 stand alone effect and I would send that to my VC, you saying that the signals would cancel out?

Νο..
180^ο out of phase signals cancel each other only when they are mixed (added in parallel..)..
(the degree of cancelation depends on amplitudes..)

For series addition, there is no problem..