Ok Artie how do I fix this one?

[ArtieToo]

Re: Ok Artie how do I fix this one?

It sounds ok, except for one thing: The "50's mod" is really only applicable to a single volume control guitar. (IMHO)

Here's why: (I'm at work, so can't illustrate this.)

The 50's mod consists of moving the tone control from the "end" of the pot, to the wiper. This means that you're adding resistance to the tone circuit as you roll-off the volume. But in a dual-volume control guitar, the pups output is connected to the wiper, (ala Les Paul), so the interaction with the tone circuit is completely different. As in - not there.

So you can approach this in two different ways:

1. Wire the volume controls "normal", which means that one control will affect both p'ups.

2. Skip trying to do the 50's mod. (Which I can't see how it would work in a dually anyway.)

Perhaps Kent will weigh in on this and double check my logic here.

Edit: Since you're going to be using a "Tele" style switch, this may be do-able. I'll haveta doodle a couple things and check.

[dr.barlo]

Re: Ok Artie how do I fix this one?

Artie,

While we are at it lemme ask you about a wiring I was thinking of. (Kent if you are reading this let me know what you think)

It is for a fat/fat strat, split, and 2vol 2tone setup. I am gonna be using 2 CTS500K's and a 500/500K dual concentric pot (for the tone).

I want to run the each of the pickups into a DPDT mini swotch. The hot from that mini will go into its corresponding 500K vol pot (and the tone will be wired a la 50's). Then the hot from the vol pot will run into a 3 way tele kinda blade switch, and the hot from the 3-way will run into the jack.

How does that sound? Any comments?

[ArtieToo]

Re: Ok Artie how do I fix this one?

But then when neck or middle is active with the bridge, the tone pot of the neck/middle would have some control over the bridge pickup as well. What the overall K value be is a funky business that I am trying to figure out myself.

Anways, it would do what he wants.

B

Thats true. One thing to realize here, which is true of all guitar wiring, when all three pickups are selected, and both volumes are at max, points A, B, C, D, and E are all shorted together. It doesn't matter where a tone control is in the circuit, it will affect the overall tone of the whole guitar.

There's just no way to get true circuit isolation using passive components - with the exception of using isolation transformers, but thats a whole 'nother ballgame.

[dr.barlo]

Re: Ok Artie how do I fix this one?

I guess what he needs to do is to disconnect the pot of the bridge pickup (500K) from the tone circuit, and simply run it to the jack, and only there would the output from the neck and middle (250K vol 250tone) get connected.

But then when neck or middle is active with the bridge, the tone pot of the neck/middle would have some control over the bridge pickup as well. What the overall K value be is a funky business that I am trying to figure out myself.

Anways, it would do what he wants.

B

[ArtieToo]

Re: Ok Artie how do I fix this one?

Sometimes its better to understand the principal, rather than be locked into a literal drawing.

Look at this pic: (Hold down SHIFT, and click for large version.)



The part in the green box is the "tone control circuit". It can be attached to any of the places A, B, C, D, or E. With A being for the neck, B for the middle, etc. You can even put in more than one at multiple places, as long as you realize that they'll interact if switched inat the same time.

[idsnowdog]

Re: Ok Artie how do I fix this one?

What I am looking for is a 500k volume for the bridge without tone. The neck/mid 250k volume with 250k tone. The third schematic looks close to what I have and I think it might work the way I want? Let me get out the soldering iron and I will call you back.

Snowdog

[ArtieToo]

Re: Ok Artie how do I fix this one?

Ok . . . I just did this quick and dirty, but bear in mind, that it may not work the way you want. You'll have individual tone controls as long as you only have one pup selected. As soon as you select the neck and middle, both tone controls come into the circuit, and you'll lose twice the highs.

There's no real way to get around this that I can see.

http://www.neighborhost.com/images/idsnowdog02.jpg

Edit: Ok, now that I re-read your post, I may be misunderstanding you. Do you want just one tone control for both the neck and middle, or two tone controls?

See if this drawing is closer to what you want:

http://www.neighborhost.com/images/idsnowdog03.jpg

[idsnowdog]

Here's the schematic that I used on my last guitar as drawn by you. What I am looking to do is to modify the schematic so that the bridge pickup doesn't have a tone control but the neck/mid do. Both the neck/mid and bridge still have their own volume pot. By the way this is a different guitar.

Snowdog


http://www.neighborhost.com/images/idsnowdog.jpg