3 way switch for 2 different capacitor values plus off position

Z

zakco

Member
I'm experimenting with a modified Fuzz Face circuit and I'd like to have a 3 way switch that goes between 2 capacitor values plus an off position that acts as if there was no connection. This will be placed across the Base and Collector of Q1 as a 2 position LPF and no LPF. Would this be the correct switch to use and if so, how would I wire it to achieve the result I'm after?

 
From this thread

dpdt-on-on-on-cap-switch-sweep_switch-png.75732


Or

dpdt-on-on-on-type-b-caps-small-med-large-png.75735

DPDT on on on
Leave C1 unpopulated in your use case
 
Thank you for the detailed explanation!
If I were to use the 2nd example:

TOGGLE DOWN and you have C1
TOGGLE CENTRE and you have C2
TOGGLE UP sums parallel C2 & C3
Click to expand...

If I used the following values:
C1 - omitted
C2 - 220 pF
C3 - 470 pF

I would end up with 690 pF when the switch is in TOGGLE UP position, correct?
 
1630419617133-png.15517

From the same thread. Most DPDT are type 2, but always check.
No, the second example is basically an or switch, no series or parallel. 1 2 or 3.
This is nice because you get
Some
More
Even more

Vs.

More
Some
Even more

Like a lot of lazy/cheap commercial builders do to save 59 pesos on a 2 pole switch

If you don't populate C1, it's an open.l to ground .Wire in place of C1 and it's a short to ground.
The first example uses series caps.
 
You must log in or register to reply here.
Back
Top