Bypass wiring

[Bigshredder]

Hi guys and gals!
I have just built an buffered splitter pedal and put in an 2 pdt on-off-on switch so I can toggle between an high pass filter that cuts from 100hz and one that cuts from 160hz. I was gonna make the switch cut at 100hz and the other position on bypass but I like both these settings. But when I wire like this (se picture) these is only 2 positions that high passes and no bypass mode. Is there a way to wire with this 2 pdt switch to utilize all thre modes or do I have to buy another switch? Do I need an 3 pdt for that and how will I connect everything then? The capacitors I use for the hp filter is 10nf and 15nf and the resistor that goes between out and earth is 100k. Work awesome and sounds good. Hope someone can help me out
Cheers!

[GGBB]

You can use a DPDT on-on-on switch wired in a different way. Note first of all that DPDT on-on-on switches are strange beasts - they are not fully on-on-on - and they can be used as 1P3T switches. Wired like this:



You get bypass in the middle and the two filter options on either ends. The switch works because in the middle position, opposite sides of the two poles are switched on or connected (thus the partial-on in the middle position) so both caps are jumpered. In the other positions, only one of the two caps are jumpered.

Here is a diagram of a DPDT on-on-on or SP3T in operation - ignore the red line and labels and just note the blue lines indicating the internal connections in each of the three positions:



Make sure you check your switch so that you use the correct ends of each pole - otherwise your middle position will be both caps in series instead of both caps jumpered.

[Bigshredder]

Superthanks for your your reply 😃👍🏻 I guess I'll need an on-on-on switch then? Cuz this won't work with on-off-on right?
Again super thanks
Cheers

[GGBB]

Superthanks for your your reply 😃👍🏻 I guess I'll need an on-on-on switch then? Cuz this won't work with on-off-on right?
Again super thanks
Cheers

Right - on-off-on won't work. You could just use a second switch for the bypass if you've already got one.