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Is there a problem with this diagram?
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Re: Is there a problem with this diagram?
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This phase switch works differently than the more common type of phase switch most guitarists are familiar with and featured in other Seymour Duncan diagrams, which reverses phase on the whole pickup, and whose effects are only heard when that pickup is combined with another pickup. Instead, this phase switch puts the two coils of the bridge pickup out of phase with each other, and whose effects are more intense and also present with or without that pickup being combined with another pickup. So it might be a good idea in this case to provide a more robust description of this switch in the title of the diagram beyond just "phase" to flag for the potential user that this switch works differently than what they might be expecting otherwise.
The actual error in this diagram is that the switch is wired backwards, i.e. the bridge pickup coils will be out of phase with each other in the down position of the phase switch instead of the up position. To fix this, the red wire on the left side of the phase switch should be moved from the bottom left lug to the top left lug, and the wire on the right side of the phase switch that leads to the 3 way pickup selector switch, should be moved from the bottom right lug to the top right lug.
Last edited by Jack_TriPpEr; 04-18-2020, 02:08 AM.Sanford: "The hardest part about tone chasing is losing the expectations associated with the hardware."
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Re: Is there a problem with this diagram?
Originally posted by Jack_TriPpEr View PostThanks GuitarDoc! It's great to hear that other forum members also see the potential benefits of this effort for both forum members and visitors to the SD website.
Since you are an esteemed wiring expert, and Artie seems to have been out-of-pocket lately (hope he is ok), would you mind reviewing the two diagrams in Reply #11 and Reply #12 of this thread that I was asking him to take a look at?
https://forum.seymourduncan.com/show...=1#post4409894Originally Posted by IanBallard
Rule of thumb... the more pot you have, the better your tone.
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Re: Is there a problem with this diagram?
Originally posted by GuitarDoc View PostI don't see a problem with the diagrams in that link.
Looks like the unterminated Finish wire (white) of the P90 in this position does not in fact emit noise like I suspected it would because apparently no signal flows through the P90 coil at all even though its Start wire (black) is connected to Hot. Apparently the P90 coil is bypassed by Hot signal entirely because there is a route to Ground available through the Rail coil.
So these two diagrams have been verified as NOT having any issues. (ref. Reply #11 and Reply #12 of this thread: https://forum.seymourduncan.com/show...=1#post4409894)
Thanks for reviewing it GuitarDoc!
Last edited by Jack_TriPpEr; 04-19-2020, 07:56 AM.Sanford: "The hardest part about tone chasing is losing the expectations associated with the hardware."
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Re: Is there a problem with this diagram?
Originally posted by GuitarDoc View PostI don't see a problem with the diagrams in that link.Administrator of the SDUGF
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Re: Is there a problem with this diagram?
Not a problem so much as an omission. I went recently to look up the diagram for Blackouts in my one volume one tone PRS SE, and I couldn't find one for it. When I select 2 Blackouts, one in the neck, and one in the bridge, the only option is for a single volume knob only.
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Re: Is there a problem with this diagram?
Originally posted by misterwhizzy View PostNot a problem so much as an omission. I went recently to look up the diagram for Blackouts in my one volume one tone PRS SE, and I couldn't find one for it. When I select 2 Blackouts, one in the neck, and one in the bridge, the only option is for a single volume knob only.
Sanford: "The hardest part about tone chasing is losing the expectations associated with the hardware."
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Re: Is there a problem with this diagram?
-Seymour duncan 7 string sentient and pegasus pickups
-3 way toggle
-CTS 500k volume
-CTS 500k tone mini pot (fitment issues)
-Schecter 7 string guitar
wired exactly like this diagram.
PROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.
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Re: Is there a problem with this diagram?
Originally posted by JorgeB View Post[ATTACH=CONFIG]104805[/ATTACH]
-Seymour duncan 7 string sentient and pegasus pickups
-3 way toggle
-CTS 500k volume
-CTS 500k tone mini pot (fitment issues)
-Schecter 7 string guitar
wired exactly like this diagram.
PROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.
Can you make your own thread and post pics of your wiring? This thread is for definite issues with a diagram that needs to be corrected. This diagram looks good, so we need to see your wiring...just make your own thread.Administrator of the SDUGF
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Re: Is there a problem with this diagram?
The first attachment is a wiring diagram with an error. The second attachment is a version i created that correxts for that errorm
The URL that hosts the current version of the drawing is here:
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The push-pull for the Master Series / Parallel switch is missing wire connections in the "up"position of the switch. There a couple ways to wire a Master Series Parallel switch, and the one I have implemented here, provides the benefit of not having to have the 3 way pickup selector switch set to a particular position in order to avoid a cutout in all output when the Master Series Parallel switch is set to "In Series" (which is the Up position of the switch). An alternate approach of adding a jumper wire to the original diagram, (from the top left side of the MSP switch to the top right side of the switch) would work but has the downside that there will be no output from the guitar when the 3 way pickup selector switch is in Position 3.
UPDATE: It was later spotted that additionally the original drawing is also missing a ground wire connection between the tone pot and volume pot. Without that ground wire connection, noise will be present/audible in the output signal. The drawing with corrections for the other errors, also needs to have that missing ground wire added to it.
Version that has the error:
Version with a correction:
Last edited by Jack_TriPpEr; 06-18-2020, 08:38 PM.Sanford: "The hardest part about tone chasing is losing the expectations associated with the hardware."
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Re: Is there a problem with this diagram?
Originally posted by JorgeB View PostPROBLEM: Both pots are working as volume and both have to be turned up for either pickup to work. Neither works as a tone pot. I don't understand what I am doing wrong. Please help.
Looks like Jack is on top of this, but I'll double-check the couple that I've been asked about.The Artie formerly known as ArtieToo.
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Re: Is there a problem with this diagram?
This is a post to thank everyone for contributing.Administrator of the SDUGF
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