Petrucci style wiring help

[Kiichi]

Hey guys,
I just installed new pickups (NPD very soon) and wanne have them work as the Liquifire / Crunchlab combo I had in there before. Those were wired with a Dimarzio EP1111 switch to be neck/neck&bridge split/bridge, aka Petrucci style. Thing is that the Diagramm I got calls for both cables of the PUs to face the same direction in order to get the proper coils on. Since I have covered humbuckers now that will not fly visually, so I wanne have the slug coils on in the middle.

I tried to figure out how to do it myself thinking the wiring through, but I must have gotten something wrong cause it does not work as I want it to.

Could any of you fine gentleman help me out?

Thanks and cheers,
Kiichi

[darkbluemurder]

I tried to figure out how to do it myself thinking the wiring through, but I must have gotten something wrong cause it does not work as I want it to.

Can you please be a bit more specific about what does not work - does it not select the right coil combination in the middle position, does it hum etc.

Cheers Stephan

[Kiichi]

I tried to figure out how to do it myself thinking the wiring through, but I must have gotten something wrong cause it does not work as I want it to.

Can you please be a bit more specific about what does not work - does it not select the right coil combination in the middle position, does it hum etc.

Cheers Stephan

Yeah, it does not select the right coil as I have the HBs placed so the slugcoils are inner. With covered HBs it looks stupid otherwise. The diagramm however takes another path and has both HBs turned with the cables coming out at the same side. So on the neck for example the screw coil is active with that wiring.

I tried to just switch out the coils but it did not work (probably error on my side somewhere). I also tried to come up with a wiring that in my mind would have the green and white wire just sit around in the respective HB on positions as if they were taped together and then be send to ground when the middle is activated. It does not split at all for some reason. Will have to revise that, look for soldering errors and maybe draw it up to share it here.

[darkbluemurder]

The reason that the pickup wires go out both sides of the diagram is that the neck pickup is installed differently. This is done to achieve a coil magnet stagger so that when the two inner coils are selected, humcancelling operation remains (similar to the PRS 5-way rotary switch).

Did you order the pickups as standard or one as reverse polarity (if you mention 5-way rotary BKP does this automatically)? If yes, you can achieve the exact Petrucci wiring with humcancelling split in the middle position. If no, you can

1) Wire the pickups coil tapped in the middle position using the inner coils and accept that it will not be humcancelling

2) Flip the magnet in one of the pickups

3) Leave the pickups as they are and wire the neck pickup so that the screw coil stays operative in coil split mode - not original Petrucci wiring but humcancelling, and you may like the tone.

Cheers Stephan   

[Kiichi]

The reason that the pickup wires go out both sides of the diagram is that the neck pickup is installed differently. This is done to achieve a coil magnet stagger so that when the two inner coils are selected, humcancelling operation remains (similar to the PRS 5-way rotary switch).

Did you order the pickups as standard or one as reverse polarity (if you mention 5-way rotary BKP does this automatically)? If yes, you can achieve the exact Petrucci wiring with humcancelling split in the middle position. If no, you can

1) Wire the pickups coil tapped in the middle position using the inner coils and accept that it will not be humcancelling

2) Flip the magnet in one of the pickups

3) Leave the pickups as they are and wire the neck pickup so that the screw coil stays operative in coil split mode - not original Petrucci wiring but humcancelling, and you may like the tone.

Cheers Stephan

I never cared much about humcancelling, so I would like to do option 1. Though 3 might not be bad either thinking about it.

[darkbluemurder]

Option 1 will be fine enough if you use this position mainly for cleaner tones - then the non-humcancelling situation will not be as much of an issue.

Cheers Stephan

[FELINEGUITARS]

Ole - if I had known it was for Petrucci wiring I would have asked for a reverse magnet  option in one pickup for you

[Kiichi]

Ole - if I had known it was for Petrucci wiring I would have asked for a reverse magnet  option in one pickup for you

Really no issue at all. I am someone who prefers stock magnets. For my P90 set I also got stock cause I like that extra full frequency response. Even if the Petrucci wiring is meant to be humcancelling. Since I use that position for lower gain sounds mostly it does not really matter much anyhow. Plus I am likely to try 1k resistors in series with the shut of coil (Prs style) at one point and that will also slightly reduce hum, so either way I am good.

Plus I can always turn on my ISP Decimator clone ;)

I will likely have another shot at getting this sorted on wednesday since it looks like I have time there to do it in calm.
I will aim to get it to work with the slug coils. Then again that is what I thought would happen with what I currently run...oh well, wednesday.

Cheers guys!

[darkbluemurder]

Plus I am likely to try 1k resistors in series with the shut of coil (Prs style) at one point and that will also slightly reduce hum, so either way I am good.

That would be a port over from the "David Grissom Wiring".

Cheers Stephan

[newtmitch]

Ole - if I had known it was for Petrucci wiring I would have asked for a reverse magnet  option in one pickup for you

Really no issue at all. I am someone who prefers stock magnets. For my P90 set I also got stock cause I like that extra full frequency response. Even if the Petrucci wiring is meant to be humcancelling. Since I use that position for lower gain sounds mostly it does not really matter much anyhow. Plus I am likely to try 1k resistors in series with the shut of coil (Prs style) at one point and that will also slightly reduce hum, so either way I am good.

Plus I can always turn on my ISP Decimator clone ;)

I will likely have another shot at getting this sorted on wednesday since it looks like I have time there to do it in calm.
I will aim to get it to work with the slug coils. Then again that is what I thought would happen with what I currently run...oh well, wednesday.

Cheers guys!

Hey Kiichi - if you don't mind me asking, as I'm taking the thread off-topic a bit here, what wiring did you end up using for your BKPs into your JP 3-way switch PC board?  I'm getting ready to put my BKP's in my JP6 but am a bit concerned about color differences and getting the right wires to the right places on the board.  I found a few references online to wiring diagrams, but they're for the Dimarzio pups, not BKP.  Plus I'm a pickup mod newbie so tackling a lot of new issues all at once... :)

[Kiichi]

Ole - if I had known it was for Petrucci wiring I would have asked for a reverse magnet  option in one pickup for you

Really no issue at all. I am someone who prefers stock magnets. For my P90 set I also got stock cause I like that extra full frequency response. Even if the Petrucci wiring is meant to be humcancelling. Since I use that position for lower gain sounds mostly it does not really matter much anyhow. Plus I am likely to try 1k resistors in series with the shut of coil (Prs style) at one point and that will also slightly reduce hum, so either way I am good.

Plus I can always turn on my ISP Decimator clone ;)

I will likely have another shot at getting this sorted on wednesday since it looks like I have time there to do it in calm.
I will aim to get it to work with the slug coils. Then again that is what I thought would happen with what I currently run...oh well, wednesday.

Cheers guys!

Hey Kiichi - if you don't mind me asking, as I'm taking the thread off-topic a bit here, what wiring did you end up using for your BKPs into your JP 3-way switch PC board?  I'm getting ready to put my BKP's in my JP6 but am a bit concerned about color differences and getting the right wires to the right places on the board.  I found a few references online to wiring diagrams, but they're for the Dimarzio pups, not BKP.  Plus I'm a pickup mod newbie so tackling a lot of new issues all at once... :)

Sorry for the late reply, forgot to check here for a while.

I must admit I have not found a relaxed enough moment to fix up the middle position yet. University, among other things, keeps me too occupied. When I have free enough time I like to spend it playing right now.

Soon as I get around to it I will attempt to set it up so I have the necks screw coil and the a bridge coil actived. IŽll actually have to see which one I will go for with the bridge...weŽll see which stays on when I just convert the dimarzio diagramms, though I must say I would be interrested to hear how it sounds with the two screw coils active (the two outer ones in my case), so I will try that at one point. Could be cool I imagine. Might take a PRS style resistor in series on the bridge (turning the slugcoil only down instead of off) so that it is not that terrible thin and weak to keep some balance, but hey.

IŽll write here again once I have done somthing. Dunno when that will be though tbh.

[Kiichi]

Ah yes, I finally got my buttox up and did something. I went of the basis of this Diagramm http://yoz1.free.fr/2h1v1t_1ep1111petrucciDsonic.GIF with converted colors obviously (FAQ Wiring section of the website has the chart), but used the same wires from the bridge for the neck also (meaning green to ground and red and black together). Now I have the screwcoils activated in the middle and it sounds good at first try. IŽll leave it and give it more extensive play. Maybe try neck slug later though.

Thanks for the comments and help guys!

[darkbluemurder]

Screwcoils active sounds more like tele middle position. Slugcoils active sounds more like strat #4 position (bridge + middle in parallel).

Cheers Stephan

[Kiichi]

Screwcoils active sounds more like tele middle position. Slugcoils active sounds more like strat #4 position (bridge + middle in parallel).

Cheers Stephan

Indeed. I really like to use that effect. On my HSH guitars I have the HBs flipped so that the slug coil is the outer coil. I really dig that sound more, alone and especially combined with the middle. I do also however find that the effect is much more pronounced on the bridge. I just totally love outer coil splits of bridge PUs in all variants, they just have a certain something to them. Depeding on the PU a PRS style resistor can be advisable though.

[Kiichi]

Ok, quick update. Busted out my croco-clamps and did a bit of tweaking. Ended up having a 15n cap in series with the bridge split path and 440 Ohm in series with the neck split path. Little less hum, more balance and a bit more output. I still get a drop when switching to the middle, but that is kinda wanted. However now it feels more natural and fits in nicely with the HB positions. I really dig it!