Post by hembryguitars on May 20, 2005 14:13:23 GMT -5
You all seem to be the goto guys for these kinds of questions. I have the Seymour Duncan STL-2 tapped version (red white and black leads) and I have the 'T' Model Megaswitch (3 way). I don't want to use any extra switches or push/pull pots. What all is possible with this combo? Thanks. And thanks for all of the help in the past too!
A nice simple setup! It looks like you have a pickup with two sounds (full single coil and tapped single coil), and a versatile three position switch, with two poles. That gives you an extra switch postion to do something with. Possible ideas that I can think of for the third position are:
1. a custom, fixed, tone control arrangement to give a high cut (but different to the basic tone control, say at a higher frequency), or maybe a low cut as well to emphasise mid frequencies. or,
2 A volume and tone bypass that cuts the pots out of the circuit, for a slighty different tone, but also for use in quickly switching to max volume for a lead solo, without having to turn the knobs.
See what other ideas people come up with, and give us your view
Here is a schematic for the vol/tone bypass version. The extra flourish of blue capacitors and resistors across the output side of the switch is to control 'switch pop'. Guesstemated values would be 100pF and 10M Ohms for these. They might not be needed, depending on the switch, and they could then be omitted.
I see the SD site has an 'untapped' Esquire diagram, with a 3-position switch which seems to be used for volume control only / volume plus tone pot / volume plus high and low cut filter. If you wanted to go with the other option (ie ratherr than the circuit above), some of that could be incorporated.
Post by hembryguitars on May 21, 2005 1:26:41 GMT -5
Thank you for the schematic. Even with all of the guitars I've built, I have never used a mega switch. I guess I should have just asked what wires go where ;D . There are a black red and white wire from the pickup and there a numbered 1-8 and a ground on the switch. If you could spell it out for me like: 1=red from pickup 2=to volume 3=to output jack etc. This is for a customer's guitar and I just want to make sure I get it right. Thanks so much.
Is that the right switch? Looks like 4 and 8 are the poles, with 4 connecting to 1, 2, 3 and 8 connecting to 5, 6, 7. You should check this though with a multimeter and/or by looking at the switch contacts, especially since its for your customer, then label the diagram
As for the pup, black goes to ground, and Im assuming the red is the tap, as Ive shown on the schematic.
Post by hembryguitars on May 21, 2005 11:57:02 GMT -5
That is the very same switch. I guess what I'm having the problem with is how does it bypass the pots? Do I just run another line straight from the switch to the output? I'm assuming the switch is basically a double pole triple throw? I don't know how something so simple has me so confused. Thanks for walking me through this, Scott.
Yes, Im assuming the switch is 2pole 3 throw, which is something you should check.
The output is wired only to one of the poles, which is the one on the right shown on the diagram. There is no direct connection from output to pots. The diagram shows the switch in the bypassed position.
To help understand, just mentally cross off the blue caps and resistors.
If you follow the switches, youll see that in the position shown, the left switch has disconnected the coil from the input side of the vol/tone controls, and the right side of the switch is connected to the pole which has a direct connection to the coil. So the volume and tone pots have no connection to the hot output of the coils. They are still connected to ground but they cant do anything.
Post by hembryguitars on May 21, 2005 17:48:29 GMT -5
Bingo! You finally got it through. Thank you so much! George will be happy. This is the second project he's having me do. His first was a doubleneck Esquire/Tele www.hembryguitars.com/twincaster.htm which was simple to wire. We just used a 5way.
Thats great Scott! and I love your Twincaster. I play a Shergold (just one neck), but they were most famous for their twin necks. If you want to compare notes, check out www.shergold.co.uk for all the details including circuits.