Les Paw

[Patrick from Davis]

I tried the "Vintage" wiring scheme and went back to the more common modern one.  I found it behaved a lot better using the modern method.
Patrick

 

[Cagey]

I don't care to get into this debate.  :doh:

No doubt. You seem to be heavily invested in the idea that you can present a constant load to the pickups. If I get ambitious later on, I'll make some drawings and add the math so you can see what's going on.

 

[line6man]

I don't care to get into this debate.  :doh:

No doubt. You seem to be heavily invested in the idea that you can present a constant load to the pickups. If I get ambitious later on, I'll make some drawings and add the math so you can see what's going on.

The impedance still changes as the pot is adjusted, in both cases. With the wiper as an output, the impedance from the pot input is constant, but the load still varies, because the wiper terminal changes the series resistance between the impedance at the input and the impedance at the output. Constant input impedance is not possible without buffering.

 

[fretless]

I'm confused .. :icon_scratch: The geetar sounds killer and functions right . What is it that it might do ?  :evil4:

 

[line6man]

I'm confused .. :icon_scratch: The geetar sounds killer and functions right . What is it that it might do ?  :evil4:

Generally, the normal wiring provides a better taper and more consistent tonality throughout the sweep, as you adjust the volume. But if you're happy with the behavior of the pot, that's all that matters.
:headbang1:

 

[fretless]

ahh , ok , as long as it's not going to kill me or anything.. :confused4:

 

[Nando Vallart]

Really cool! love LP and love cats! so win-win!!!!!

And sorry for your cats

 

[DangerousR6]

It needs one of my truss rod covers(the black one)..

And I can put this on it for you..

 

[fretless]

Thanks Fellas ! I thought about it long and hard and went with no TRC for this one but that is a super sweet offer and Thank you for that !  ccasion14:

 

[DangerousR6]

Thanks Fellas ! I thought about it long and hard and went with no TRC for this one but that is a super sweet offer and Thank you for that !  ccasion14:

:icon_thumright:

That's still a super sweet LP...

 

[Jumble Jumble]

It doesn't make any difference. The volume and tone pots are in parallel with the pickup, and they're all in parallel with amp's input. Draw it out schematically, rather than as a wiring diagram. It's much more clear when you look at it that way.

They look different to me.

EDIT: or if you prefer:

It is much clearer, yes, and they're clearly not equivalent circuits.

 

[Jumble Jumble]

That doesn't mean it's best. There are differences in the functionality of the scheme, when there are two sets of volume and tone controls, but when there is only one, there is no reason not to wire the volume pot properly. Wiring the wiper terminal as an output prevents variable impedance loading effects, helping the pot to behave more consistently throughout its rotation.

You appear to have misread both the diagram and the photo. The pickup is going to the outer lug, the jack to the wiper. The thing that makes it "50s wiring" is that the capacitor is coming from the wiper, not the pickup. That's what I've drawn in my schematics above.

 

[fretless]

I have wired it just like that pic . What is the problem ?

 

[Jumble Jumble]

There's no problem. It's line6man who's misread the diagram and photo.

 

[fretless]

There's no problem. It's line6man who's misread the diagram and photo.

pheew , strums diddy...  :icon_biggrin:

 

[fretless]

dare I post another gut shot  :icon_biggrin:

 

[Cagey]

It is much clearer, yes, and they're clearly not equivalent circuits.

Remove the tone control, and it's this...

versus this...

All you've done is moved where the low-pass is, and it's still effectively in parallel with the output either way.

 

[Jumble Jumble]

Haha, yes remove the tone control and it's the same. But with the tone control there it's clearly not! The low pass isn't in parallel with the output jack in modern wiring. Yes it's in parallel with the pickup, and if the volume control wasn't there then the pickup would be connected in parallel with the jack too. But that pesky volume control is there.

The difference is that in the 50s wiring, the low pass can't take treble from the pickup to ground without going through the volume control first.

This means that as the volume control is turned down, increasing the resistance between pickup and ground, the following happens:

modern wiring: more signal goes into the tone control. As volume is turned down, treble is lost.

50s wiring: less signal goes into the tone control.

Hmm, are we talking at cross purposes? How about if we forget they're pots for a minute:

If we're just talking about load on the pickup, then from pickup to ground the resistance in both cases is X + Y in parallel with T + whatever the series resistance of the capacitor is.

However, if we're talking about how the tone control works, that's where the difference comes in. For the treble to get from hot to ground, in modern wiring it simply sees a resistance of (T + cap) in parallel with (X+Y) at all times. In 50s wiring it sees (T + Y + cap) in parallel with (X). That changes as the volume control is changed.

Maybe that's where we've misunderstood each other.

 

[line6man]

There's no problem. It's line6man who's misread the diagram and photo.

I just double checked, and you're right. :doh:

So the diagram and wiring were right all along. But now there is a different problem. The tone pot sees the variable impedance load from the pot.

 

[fretless]

I just did 50's wiring on my tele build and freakin love it !