hum in positions 2 and 4 of 5 way switch - Jemsite
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post #1 of 4 (permalink) Old 01-25-2008, 12:53 PM Thread Starter
 
Join Date: Jan 2008
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hum in positions 2 and 4 of 5 way switch

Hey guys. Dug out my RG 470 (Japan model) from 1999 and put in all 3 new evolution pickups. Started with the bridge evo 1, then added the ISCV2 in mid, and finally the evo neck in neck position. These installs where done on three different dates. The evo 1 in bridge installed excellent, no problems. The next week I added the ISCV2 in mid which was also an easy hookup. But when the following week I added the evo neck there was now an obvious low frequency hum that I had never noticed before. The funny thing is that it only makes the low hum, which is rather loud when distortion in on, in positions 2,3,4 not when using positions 1 (full neck humbucker) or 5 (full bridge humbucker) of the 5 way stock ibanez switch. I do know that the mid pickup is a single coil and there will be a buzzing sound when I switch to position 3. That is there as it always has been even with the old ibanez stock pickups. But this new low frequency hum is also there in position 3 as well as 2 and 4. So to sum it up, low frequency hum in 2, low frequency and high frequency hum in 3, low frequency hum in 4, both 1 and 5 have no hum and sound excellent. Just in case, I rewired all the grounds from the pickups to the same spot twice and checked all the other wires and there appears to be no problems. I also tried moving wires around while plugged in to see if there were any loose connections but still no problems. So I pretty much have no clue as to why this low hum is present.

Other info that might help-I replaced the stock v8,s,v7 (H-S-H) pickups with the evolutions. Still have the standard Ibanez 5 way switch (8 pins in a row). Followed the directions found on this site which were: pin1=red bridge wire, pin2=black mid wire, pin3=red neck wire, pin4=white to pot (didn't touch this wire), pin 5=open,pin 6=white/black bridge wires, pin 7=black to pot (didn't touch this wire), pin8=white/black bridge wires. This should follow the Jem Dimarzio H-S-H diagram from their website except that their 5 way switch has pins on both sides. To keep this from getting confused I just put the red wires where the old pickups red wires were and connect the white and black wires together to where the old pickup's white wires where. Found that tip on this site too and seemed to work great until I added that neck pickup. Also, the volume of the mid pickup is a quieter than the bridge or neck humbuckers but I figure that is normal since it is a single coil but maybe I'm wrong and it's another clue as to what the problem is.

Does anyone have any clue as to what I did wrong or a way to troubleshoot this? Any comments will be much appreciated
jazzmcs is offline  
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post #2 of 4 (permalink) Old 01-29-2008, 08:24 PM
 
Join Date: Nov 2007
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Re: hum in positions 2 and 4 of 5 way switch

Quote:
Originally Posted by jazzmcs View Post
Hey guys. Dug out my RG 470 (Japan model) from 1999 and put in all 3 new evolution pickups. Started with the bridge evo 1, then added the ISCV2 in mid, and finally the evo neck in neck position. These installs where done on three different dates. The evo 1 in bridge installed excellent, no problems. The next week I added the ISCV2 in mid which was also an easy hookup. But when the following week I added the evo neck there was now an obvious low frequency hum that I had never noticed before. The funny thing is that it only makes the low hum, which is rather loud when distortion in on, in positions 2,3,4 not when using positions 1 (full neck humbucker) or 5 (full bridge humbucker) of the 5 way stock ibanez switch. I do know that the mid pickup is a single coil and there will be a buzzing sound when I switch to position 3. That is there as it always has been even with the old ibanez stock pickups. But this new low frequency hum is also there in position 3 as well as 2 and 4. So to sum it up, low frequency hum in 2, low frequency and high frequency hum in 3, low frequency hum in 4, both 1 and 5 have no hum and sound excellent. Just in case, I rewired all the grounds from the pickups to the same spot twice and checked all the other wires and there appears to be no problems. I also tried moving wires around while plugged in to see if there were any loose connections but still no problems. So I pretty much have no clue as to why this low hum is present.

Other info that might help-I replaced the stock v8,s,v7 (H-S-H) pickups with the evolutions. Still have the standard Ibanez 5 way switch (8 pins in a row). Followed the directions found on this site which were: pin1=red bridge wire, pin2=black mid wire, pin3=red neck wire, pin4=white to pot (didn't touch this wire), pin 5=open,pin 6=white/black bridge wires, pin 7=black to pot (didn't touch this wire), pin8=white/black bridge wires. This should follow the Jem Dimarzio H-S-H diagram from their website except that their 5 way switch has pins on both sides. To keep this from getting confused I just put the red wires where the old pickups red wires were and connect the white and black wires together to where the old pickup's white wires where. Found that tip on this site too and seemed to work great until I added that neck pickup. Also, the volume of the mid pickup is a quieter than the bridge or neck humbuckers but I figure that is normal since it is a single coil but maybe I'm wrong and it's another clue as to what the problem is.

Does anyone have any clue as to what I did wrong or a way to troubleshoot this? Any comments will be much appreciated
It's because those positions on the switch split the humbuckers into single coils, which are notorious for hum..
wbreslin951 is offline  
post #3 of 4 (permalink) Old 01-30-2008, 10:35 AM
 
Join Date: Aug 2007
Location: Braga, Portugal
Posts: 1,339
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Re: hum in positions 2 and 4 of 5 way switch

The Evolution middle is a pure single-coil, isn't it? It is not a stack, from what I recall...

Try this connection diagram:
http://www.dimarzio.com//media/diagrams/C.pdf

Bear in mind that if your switch must have 2 independant circuits! They may be found on either side of the switch or just on one side. However, the important part is that you identify the 2 circuits.

Let me know if this solves your problem.
Crazy_Guitar is offline  
post #4 of 4 (permalink) Old 01-30-2008, 11:44 AM
 
Join Date: Jan 2007
Location: South West UK
Posts: 953
Re: hum in positions 2 and 4 of 5 way switch

There are further suggestions in this thread:
http://www.jemsite.com/forums/showthread.php?t=72819
Jim
Vim Fuego is offline  
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bridge hum , bridge humbucker , evolution pickups , neck humbucker , neck pickup , neck position

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