Arlo/ Eldred Tone Toggle

[syddd]

Mar 24, 2021 14:46:11 GMT -5 newey said:

Mar 24, 2021 7:10:19 GMT -5 syddd said:

Should I edit this post? Obviously with a bit more experience and wisdom, most DPDT on-on-on switches have the centre position mirrored.

Nah, we leave stuff as it was written, warts and all. You can edit any of your posts, but please do so by crossing out the original language and then making the corrections, rather than just deleting something that was incorrectly stated. That way, subsequent readers can follow what corrections were made.

Where people delete stuff from prior posts, it risks making subsequent posts nonsensical (and non-sequiturs), if someone has replied to the part that was later corrected.

Just like in math class, please "show your work"

Thanks, I've updated the parent post

[sirdavy]

Hello syddd,

I'm looking to build an Esquire with a P90, and I'd like to use a 3-way toggle switch to provide Tone & Volume/Arlo/Eldred.

I've read through this post but I can't quite unpick from everyone's replies what (1) the correct model or description for the switch is and (2) the correct schematic to use with it. Can you help me out?

[newey]

sirdavy-

Hello and Welcome to G-Nutz2!

syddd hasn't logged in here in over a year, so unlikely that he'll pop in to answer your questions.

syddd's thread dates back to 2016, and time marcches on. That (admittedly fairly confusing) back and forth was over the existence- or not- of what we have called a "Type I" DPDT On-On-On switch, as opposed to the "type II" switch. The difference is in which lugs are internally connected when the switch is in the center position. The (posited to exist) Type I would connect, at the center position, the lower right lug to the right center lug, and the upper left lug to the left center lug. I say "posited" because none of us had ever (as of 2016) encountered any but the "Type II", in which the lower left connects to the center left, and upper right to center right. Note that rotating a Type II 180° does not get you a type I- the orientation of the internal connections stays the same for each type if rotated.

Syddd had drawn his original diagram showing the "Type I", but after we all said that no such thing existed, he corrected the diagram to show a "Type II" switch. Syddd's diagram is correct for that type of DPDT On-On-ON switch.

But as I said, time marches on, and since all of that discussion back in 2016, some of our members have confirmed that Type I switches, apparently sourced out of China, do exist. So you can pretty much disregard all of that discussion. Given that both types apparently do exist, check the switch you intend to use with a multimeter (or a simple continuity tester) just to be sure which type it is before you wire according to syddd's diagram.

Also, the diagram is one of those hybrid styles, which is partly a wiring diagram and partly a schematic. If you have difficulty interpreting it, fire away with your questions and we'll get you sorted.

[sirdavy]

Thank you newey! I've not doubt I'll have a few questions, so prepare yourselves!