Specific blend pot wiring question

[ibolazzz]

Hi all,

First time poster, but have been trying to learn from this forum for a while now. I'm quite the novice here, so please bear with me and thanks in advance for any help yall can provide. I'm building a project strat and I have a very specific blending scheme in mind. Basically I'm going to use an alnico staple (soapbar) in the neck and a SD sp90-1b in the bridge (2 pickups total). I want to use a 3 way blade switch selector to choose between bridge (1), both (2), and neck (3) pickups.

However, in the "both (2)" position, I'd like to have a knob that blends the neck pickup into the bridge instead of just having them both full on. With a master volume and master tone, that will be 3 knobs total.

I posted the same question in the SD forums, but the only help I got was a reference to the broadcaster wiring scheme. Like I mentioned, I'm quite the novice, so I couldn't make sense of the 15K resistor and change the wiring to suit my selector positions.

If anyone can help me out, I'd be very grateful! Thanks again for any knowledge that can be shared.

[Chris Winsemius]

It's possible, hope to have some time later this day to make a drawing and scan/upload it.

[ibolazzz]

Originally Posted by Chris Winsemius

It's possible, hope to have some time later this day to make a drawing and scan/upload it.

Thanks, that'll be great!

[ibolazzz]

Bump :)

[Chris Winsemius]

Hi!

Sorry for the late reply, health-related delay.

Still haven't drawned/scanned it but basicly it's the same as a stock post '67 Telecaster but you have to disconnect the wire going from neck pu to the pos. 2 connector. Then you put a pot between that point and the other connector still going to the neck-mu (pos. 1*).

Hope this helps a bit! You can also wire the vol/tone-controls like an old Gibson (so called 50s wiring) and use 500k pots and a .02(2) tone-cap.

Chris

[jefrs]

Compare the P/J Bass which has 2-vol 1-tone. The pickup hot is fed to the wipers. You could use a stacked vol pot with neck blend, then selector, MV following and then tone, because of the blend pot the tone control might have to follow the blend pot, or the MV pot itself

Otoh you could adjust the pickup heights to get the blend you want, the neck pickup is always the more powerful one because of the greater string excursion. So adjust bridge for best sound and neck to balance.

[ibolazzz]

Thanks for the replies. After examining the wiring schematics I think I have a better grasp for this. In simpler terms, an independent volume pot for the neck pickup that is only in the circuit when both pickups are selected would do the trick. Now here is another question of mine.

Since I'm using a 500 Kohm Master Volume and a 500 Kohm Master Tone, what kind of volume pot should I be using the the independent volume of the neck pickup in the middle selector position? My goal is to retain the tone characteristics of when the independent volume pot is not present.

My guess is 1 Mohm because I want to preserve the original tone of the neck pickup as much as possible since treble is already leaking through the Master Vol + Tone pots. However, I don't have the experience to know if this is a good idea, so any help would be appreciated.

[waparker4]

Ok here's how I see it, but I am not an electronics expert, so take caution

Your idea of an independent neck volume in pos 2 is interesting. The switch acts as a router of pickup hot leads to appropriate volume pot. In pos 3, neck goes to 'master' pot but in pos 2 neck jumps over to the other side of the switch to route to the auxiliary volume pot. Meanwhile bridge is routed to 'master' volume pot in pos 2 and 1, jumpered on the original side of the switch

So pos 2 is the only position where that aux pot is in the circuit and in this config the circuit looks like a gibson 2 volume 1 tone circuit [citation needed]. So I'm thinking 500k would be appropriate, hoping somebody else chimes in on that detail though.

The other idea is to have the blend feed the master pot like in this link, using dual gange pot

http://www.stewmac.com/freeinfo/Elec...ts/i-4137.html

Though I'm not sure of the appropriate value pots caps

Drew