HSH Megaswitch wiring Hum issues

[evh_slash]

I'm using a 5-way Schaller Megaswitch & even though the wiring diagram is set up for hum-cancellation in all split positions I'm getting some mild hum in positions 2 and 3. Colour codes and wires have all been accounted for and correctly configured .

Switch config / positions:
1 - Bridge HB (No Hum)
2 - Bridge North Coil + RW/RP South Middle (No hum)
3 - Bridge South Coil + Neck North Coil (Mild Hum)
4 - Neck North Coil + RW/RP South Middle (Mild Hum)
5 - Neck HB (No Hum)
(All positions are in Phase)

The Hum is not quite as loud as a typical strat or tele Single coil by itself but I have also wired other guitars with the same switch & had no issues.

I tried flipping the Hot/Cold wires of the Neck pickup but then it was out of phase with the bridge & middle so I swapped them back.

Any ideas as to why its humming only in Neck split positions ?
The Neck HB is a low putput paf & only has a 3.8k split coil compared to the 5.7k Middle pickup and 7k Bridge Slug coil ? Could the mismatch between neck/middle and Neck/bridge lead to less effective hum-cancelling in those positions ?

 

[Mincer]

Re: HSH Megaswitch wiring Hum issues

Unless the coils are identical, there will be a little hum. Normal humbuckers work because under most circumstances, both coils have the same number of turns. This might be the source of the hum if it isn't a wiring issue.

 

[mst]

Re: HSH Megaswitch wiring Hum issues

I'm using a 5-way Schaller Megaswitch & even though the wiring diagram is set up for hum-cancellation in all split positions I'm getting some mild hum in positions 2 and 3. Colour codes and wires have all been accounted for and correctly configured .

Switch config / positions:
1 - Bridge HB (No Hum)
2 - Bridge North Coil + RW/RP South Middle (No hum)
3 - Bridge South Coil + Neck North Coil (Mild Hum)
4 - Neck North Coil + RW/RP South Middle (Mild Hum)
5 - Neck HB (No Hum)
(All positions are in Phase)

The Hum is not quite as loud as a typical strat or tele Single coil by itself but I have also wired other guitars with the same switch & had no issues.

I tried flipping the Hot/Cold wires of the Neck pickup but then it was out of phase with the bridge & middle so I swapped them back.

Any ideas as to why its humming only in Neck split positions ?
The Neck HB is a low putput paf & only has a 3.8k split coil compared to the 5.7k Middle pickup and 7k Bridge Slug coil ? Could the mismatch between neck/middle and Neck/bridge lead to less effective hum-cancelling in those positions ?

is impedence diffference! I guess is pretty unsolvable unless you find the right resistor to solder to the pickup hot wire. I would ask suggestions to Italian wiring WIZ FAGO http://www.fago-cablepro.com/faq/