Hexaphonic pickup mixing

[snufkin]

Hi all this is an unusual question, I am currently building a guitar with a magnetic heck pickup in the bridge position

I want to send the separate signals out of the guitar for processing on a multi pin connector and keep it separate to the rest of the wiring
but thought it would also be interesting to have a second quarter inch jack and a set of six mini volume pots to allow a mono mixed hex signal from the pickup to alter chord voicings ect
how would I go about mixing the six separate signals without interference can I passively wire them through 6 potentiometers/resistors like a normal diy passive mixer or would I need a mini powered mixer ?

thanks

[mth5044]

I would imagine you could repeat the cap-resistor combo and tack on two more inputs to this schematic by Jack Orman on AMZ and turn each of the 100k resistors into a volume.

[Mark Hammer]

I guess you want the schematic for this thing: http://www.vintagekramer.com/ripley.htm

[samhay]

The AMZ simple mixer would work, but the input impedance for each pickup is only 100k, which is a bit low for typical pickups. Is your pickup passive or active - or more importantly, what is its output impedance?

[snufkin]

around 850 ohms

I was expecting to preamp the signals externally but liked the idea of on board volume for on the fly re-voicing

[R.G.]

around 850 ohms

That's probably its resistance. What's its inductance?

Inductance dominates the impedance of pickups at high frequencies for most pickups, and I suspect it will here, as well.

Consider buffering each pickup, and then almost any mixer will work fine.

[snufkin]

will measure today thanks all

[Gurner]

This is how Roland handle their hexaphonic pickup (though, they're calling it a divided pickup in the schematic below)....

[Jaicen_solo]

Take a look at the schematics for the original Roland divided pickups on www.Joness.com/GR300. Some of them (LPK-1) were mini humbuckers measuring around 800 Ohms, so that might give you an idea of what's needed. I strongly suggest building in a Hex-Fuzz if you're going to the trouble of building a proper pre-amp per string.

[snufkin]

Thanks Jaicen

the eventual plan is indeed to build a simple hex fuzz, I originally started this project to do just that but as my tastes have mellowed I have become really interested in more subtle revoicing effects too
what I am really building is what I like to call an "expanded guitar" that extends the possibilities of the instrument without straying too far from the original spirit
my playing technique is not fantastic but I realised long ago that I love open chords and long sustain so the eventual plan is to fit a sustainer of some type as well