Post by ChrisK on Jul 21, 2006 13:07:14 GMT -5
This scheme realizes all possible combo's of three pickups (including phase) except M*(B+N) using three rotary switches. The Schaller 8P5T lever switch can also be used for each pickup.
To realize all (but as above) we actually need two 8P5T and one 8P3T switches. One could use just three 8P6T Grayhill's and position pin away. (Note to the demented, the Schaller fabled 8P5T would be "peachy" for all three switches (if'n we can figure out how to limit one to three positions, I haven't at all sussed out the use of a 5 throw for the middle pickup, but it may well be straightforward.)
There are 3 combinations of 1 of 3 pickups;
There are 3 combinations of 2 of 3 pickups, in parallel;
There are 3 combinations of 2 of 3 pickups, in series;
There is 1 combination of 3 pickups, in parallel;
There is 1 combination of 3 pickups, in series;
There are 3 combinations of 3 pickups in SSP;
There are 2 combinations of 3 pickups in SPP (as sans above);
[If two pickups (A and B) are in parallel, and the third (C) is in series, you want (A+B)*C. If two pickups (A and B) are in series, and the third (C) is in parallel, you want (A*B)+C. Assuming equal inductance, the former is 1.5 * nominal, while the latter is 0.67 * nominal. The resulting tone is different. It's further interesting in that the resulting inductances are the reciprocals of each other.]
For a total of 16 (excluding phasing and NONE).
I did check my work on this SCHEMA (not schematic) and eliminated the obvious pole redundancy.
Here's a SCHEMATIC using Grayhill rotary switches. I do find the use of symmetrical knob legends to be fast (enough for me) to change while playing, but how many different set up does one need? (I think that's why we need many different guitars.) ;D
There are a total of 27 switch combinations (sans phasing) inclusive of OFF on the schema. On the schematic, there are a total of 75 switch combinations inclusive of phasing and OFF on the schematic.
I decided that I can fit a series 71 w/ 4 decks within a Strat or Tele depth body. This allows an 8 pole 6 position (the series 71 mechanism is pin insert settable for any subset number of positions), a 12 pole 4 position, a 16 pole 3 position, and a 24 pole 2 position maximum possible configuration.
Note: The 4P6T switch is $20. We're looking at about $80 for the three switches (but I gots mine already - engineering samples rule![sometimes]).
I'd actually done this exercise for my MIM Nash Power Tele (sans power). A volume knob, three rotary switches, and a tone knob. It will fit on a Tele plate! Such designs (phasing-based) actually work much better on guitars w/ dissimilar pickups (such as the MIM Nash, Tex-Mex Tele bridge, Tex-Mex Strat middle, and a Tex-Mex Tele neck) IMHO.
I guess that I have to build it now
........And fabricate the plate. 
I'll probably use two stacked concentric pots for three tones (directly across each pickup) and a common volume
To realize all (but as above) we actually need two 8P5T and one 8P3T switches. One could use just three 8P6T Grayhill's and position pin away. (Note to the demented, the Schaller fabled 8P5T would be "peachy" for all three switches (if'n we can figure out how to limit one to three positions, I haven't at all sussed out the use of a 5 throw for the middle pickup, but it may well be straightforward.)
There are 3 combinations of 1 of 3 pickups;
There are 3 combinations of 2 of 3 pickups, in parallel;
There are 3 combinations of 2 of 3 pickups, in series;
There is 1 combination of 3 pickups, in parallel;
There is 1 combination of 3 pickups, in series;
There are 3 combinations of 3 pickups in SSP;
There are 2 combinations of 3 pickups in SPP (as sans above);
[If two pickups (A and B) are in parallel, and the third (C) is in series, you want (A+B)*C. If two pickups (A and B) are in series, and the third (C) is in parallel, you want (A*B)+C. Assuming equal inductance, the former is 1.5 * nominal, while the latter is 0.67 * nominal. The resulting tone is different. It's further interesting in that the resulting inductances are the reciprocals of each other.]
For a total of 16 (excluding phasing and NONE).
I did check my work on this SCHEMA (not schematic) and eliminated the obvious pole redundancy.
Here's a SCHEMATIC using Grayhill rotary switches. I do find the use of symmetrical knob legends to be fast (enough for me) to change while playing, but how many different set up does one need? (I think that's why we need many different guitars.) ;D
There are a total of 27 switch combinations (sans phasing) inclusive of OFF on the schema. On the schematic, there are a total of 75 switch combinations inclusive of phasing and OFF on the schematic.
I decided that I can fit a series 71 w/ 4 decks within a Strat or Tele depth body. This allows an 8 pole 6 position (the series 71 mechanism is pin insert settable for any subset number of positions), a 12 pole 4 position, a 16 pole 3 position, and a 24 pole 2 position maximum possible configuration.
Note: The 4P6T switch is $20. We're looking at about $80 for the three switches (but I gots mine already - engineering samples rule![sometimes]).
I'd actually done this exercise for my MIM Nash Power Tele (sans power). A volume knob, three rotary switches, and a tone knob. It will fit on a Tele plate! Such designs (phasing-based) actually work much better on guitars w/ dissimilar pickups (such as the MIM Nash, Tex-Mex Tele bridge, Tex-Mex Strat middle, and a Tex-Mex Tele neck) IMHO.
I guess that I have to build it now
........And fabricate the plate. 
I'll probably use two stacked concentric pots for three tones (directly across each pickup) and a common volume