Post by ChrisK on Aug 8, 2007 23:36:50 GMT -5
The HSS All Mode 'Caster 20070808
This design realizes ALL possible structural combinations of three single coil pickups, extrapolated to replace one with a two-coil humbucker. It is based on the most excellent cell structure invented by unk. His cell structure realizes all things except the three A+(B*C) structures since his design is series dominant only.
guitarnuts2.proboards45.com/index.cgi?board=schem&action=display&thread=1168294514
I transposed it from the original 4PDT/2P3T ON-ON-ON realization to a 4P3T rotary, then to a 4P5T rotary or lever to include phase, then to a 8P3T rotary to realize ALL possible combinations.
i37.photobucket.com/albums/e84/cekikta/Wiring/SSS%20RotoCaster/DSC04783CroppedD.jpg
and finally to an 8P5T rotary (suspicions abound that a German lever version exists) to encompass ALL possible combinations including phase. I further modified it for a humbucker in lieu of one single coil.
I have a three single coil version that is not yet published. It has the distinct advantage in that one pole section per switch is free for other uses such as structure-based tone component selection.
While this design DOES address all possible combinations of three pickups, it does not realize all possible combinations of four coils.
The two single coil pickups have the following STRUCTURAL combinations:
"Switch knob all the way UP"
PARALLEL out of phase with optional "half-out-of-phase" cap
PARALLEL in phase
OFF (out of structure)
SERIES in phase
SERIES out of phase.
"Switch knob all the way DOWN"
The humbucking two-coil pickup has the following STRUCTURAL combinations
"Switch knob all the way UP"
PARALLEL, both local coils in parallel
PARALLEL, both local coils in series
OFF (out of structure)
SERIES, both local coils in series
SERIES, both local coils in parallel
"Switch knob all the way DOWN"
Note that while the neck is shown as the two-coil pickup, this could be any pickup position (such as the bridge). Modifying my SSS design for a humbucker was easier this way. Simply reverse the designations as desired. I will wire it for the bridge humbucker.
The Schematic:
There are thick grey lines shown for connections on the single coil pickups if the capacitor coupled "half-out-of-phase" option is not used on the single coil pickups. Note that phase reversal is only needed on N-1 pickups.
The green and red circles in the "J" side of the schematic delineate two connection points that are connected by the switch section structure on the "K" side of the schematic. Section "K" essentially maintains the red to green connection EXCEPT in any A+(B*C) structure (realizing those additional structures not originally possible).
The chart to the right shows the realizations, sans phase and intra-humbucker connections. These were vetted separately. The Leff column indicates the variations of nominal inductance that occur in each structure, showing the need for ALL possible combinations. The circle-line drawing indicates the redundancies in structure (with series dominance). Note that due to the use of unk's cell structure, there are NO dead positions EXCEPT SHORT by design.
The back of switch Wiring diagram:
The 8P5T Rotary Switch:
Close up
i37.photobucket.com/albums/e84/cekikta/Wiring/SSS%20RotoCaster/DSC04776CroppedD.jpg
The Instrument design:
The green levers are obround offset switch knobs that enable touch registration (all are in a straight line for the OFF positions) against the heel of the next switch forward in the chain. The last smaller obround green object is the "heel" registration reference for the last switch. These are made out of 3/8" wide by 3/4" high stainless steel bar stock.
There is a master volume and a master tone in use downstream of this schematic.
In this layout, there is a tone for each pickup (and all four pots can be DPDT push pulls as well................) This rear rout body, in walnut, is what I intend to implement.
This top rout body layout would use the 8P3T switches with DPDT pp pots for 2 phase reversals (including parallel half out-of-phase) and a series/parallel for the bridge humbucker.
This design realizes ALL possible structural combinations of three single coil pickups, extrapolated to replace one with a two-coil humbucker. It is based on the most excellent cell structure invented by unk. His cell structure realizes all things except the three A+(B*C) structures since his design is series dominant only.
guitarnuts2.proboards45.com/index.cgi?board=schem&action=display&thread=1168294514
I transposed it from the original 4PDT/2P3T ON-ON-ON realization to a 4P3T rotary, then to a 4P5T rotary or lever to include phase, then to a 8P3T rotary to realize ALL possible combinations.
i37.photobucket.com/albums/e84/cekikta/Wiring/SSS%20RotoCaster/DSC04783CroppedD.jpg
and finally to an 8P5T rotary (suspicions abound that a German lever version exists) to encompass ALL possible combinations including phase. I further modified it for a humbucker in lieu of one single coil.
I have a three single coil version that is not yet published. It has the distinct advantage in that one pole section per switch is free for other uses such as structure-based tone component selection.
While this design DOES address all possible combinations of three pickups, it does not realize all possible combinations of four coils.
The two single coil pickups have the following STRUCTURAL combinations:
"Switch knob all the way UP"
PARALLEL out of phase with optional "half-out-of-phase" cap
PARALLEL in phase
OFF (out of structure)
SERIES in phase
SERIES out of phase.
"Switch knob all the way DOWN"
The humbucking two-coil pickup has the following STRUCTURAL combinations
"Switch knob all the way UP"
PARALLEL, both local coils in parallel
PARALLEL, both local coils in series
OFF (out of structure)
SERIES, both local coils in series
SERIES, both local coils in parallel
"Switch knob all the way DOWN"
Note that while the neck is shown as the two-coil pickup, this could be any pickup position (such as the bridge). Modifying my SSS design for a humbucker was easier this way. Simply reverse the designations as desired. I will wire it for the bridge humbucker.
The Schematic:
There are thick grey lines shown for connections on the single coil pickups if the capacitor coupled "half-out-of-phase" option is not used on the single coil pickups. Note that phase reversal is only needed on N-1 pickups.
The green and red circles in the "J" side of the schematic delineate two connection points that are connected by the switch section structure on the "K" side of the schematic. Section "K" essentially maintains the red to green connection EXCEPT in any A+(B*C) structure (realizing those additional structures not originally possible).
The chart to the right shows the realizations, sans phase and intra-humbucker connections. These were vetted separately. The Leff column indicates the variations of nominal inductance that occur in each structure, showing the need for ALL possible combinations. The circle-line drawing indicates the redundancies in structure (with series dominance). Note that due to the use of unk's cell structure, there are NO dead positions EXCEPT SHORT by design.
The back of switch Wiring diagram:
The 8P5T Rotary Switch:
Close up
i37.photobucket.com/albums/e84/cekikta/Wiring/SSS%20RotoCaster/DSC04776CroppedD.jpg
The Instrument design:
The green levers are obround offset switch knobs that enable touch registration (all are in a straight line for the OFF positions) against the heel of the next switch forward in the chain. The last smaller obround green object is the "heel" registration reference for the last switch. These are made out of 3/8" wide by 3/4" high stainless steel bar stock.
There is a master volume and a master tone in use downstream of this schematic.
In this layout, there is a tone for each pickup (and all four pots can be DPDT push pulls as well................) This rear rout body, in walnut, is what I intend to implement.
This top rout body layout would use the 8P3T switches with DPDT pp pots for 2 phase reversals (including parallel half out-of-phase) and a series/parallel for the bridge humbucker.
)
