Originally Posted by Wally
NO matter what the B/N wiring is in position #4, that middle pickup is still RWRP to them and throws that combination out of phase, doesn't it? MErely switching that middle pickup in for the B/N Series position cannot possibly change the B/N relationship. The B/N are still in series in that position. IT is the relationship of the middle pickp to that series combi that is giving you that thinner out of phase result.
I don't know Wally. That's what I'm trying to grasp. In Pos #4 B/N are in Series on my 4-way. With the Middle off they do combine in Series except that in this case the p/p is not shutting the Middle off completely. There is still very weak output in all positions even when it should be shut down completely.
In Pos #4 with B/N in Series when I actuate the Middle pickup the B/N in Series reverts to B/N Parallel. Despite the nature of the Middle pickup the B/N are still wired in Series to each other so why does the introduction of the Middle affect that? The Middle wouldn't also be in Series because it's not wired in Series with the other two so I would expect it only to add to the others not override the wiring. Isn't that what controls the relationship of the Bridge and Neck or is that what I'm not getting?
I took JCollins advice and wired the jumper from F to ground but the results were the same. Still weak output from the Middle with the switch off. I also wired it all to the opposite terminals (A,B,C) first without a jumper from C to ground then with but no change either way. There is still a very weak but audible output from the Middle with the switch off.
So does this lead us to the conclusion that the switch is bad? Unwired the meter readings from the terminals are; Switch On D-E = .01 and E-F = no reading. Switch Off D-E = no reading E-F = .01. Is this where the problem is coming from? Should there never be a reading between E-F no matter what position the switch is in?
Pardon my elementary level understanding of these micro electronic issues. I haven't had much experience with this stuff and though some of it is sinking in it's still sinking in slowly. That's why I appreciate the input and advice from the experts here. Little by little I'm getting better at it but since I learn by doing rather than from the telling unfortunately my lessons generally come from doing something wrong before I get it right.
Needless to say this attempt is going much better than the last (about a 100% improvement on my soldering skills) but I'm stumped as to why there is any output at all coming from the Middle with the switch in the off position. As I said in the OP, if I remove it from it's installed location in or around the pickup cavity between the two pickups it's silent. Put is back and there is weak output with the switch off.
Needless to say that has me stumped. As does the reason why although B/N are wired in Series in Pos #4 the introduction of the Middle pickup changes that relationship from Series to Parallel. B/M and B/N would combine in Parallel as would all three in Parallel but how does the B/N Series get overridden when the Middle is on?
If that's just the way it works then why doesn't the Middle interfere with B/N Series in the off position when there is still some output from it in the circuit?
So these are the two issues I'm trying to straighten out. How to get that Middle shut down completely in the off mode and how, if at all possible, to keep it from kicking B/N Series into B/N Parallel when it's on.