How to construct a "3P3T" switch?

Started by matopotato, June 11, 2023, 04:47:03 PM

Previous topic - Next topic

matopotato

Quote from: Phend on June 12, 2023, 05:06:10 PM
Quotewonder how one would do to switch two locations with three settings"


Oh... I always thought rust didn't conduct well...
I could have used this for one of my earlier projects.



"Should have breadboarded it first"

matopotato

Quote from: PRR on June 12, 2023, 07:12:40 PM
For reference: the four common types of 12-outer-lug $1 switches:

Thanks,
I always thought that withbthe rotor in position 1 would connect A to 1 in say the 3P4T
Next A-2, A-3, B-4, and so on.
I was not aware you had A-1 and B-4 engaged with one position of the rotor.
But that would make a rotor switch fix the job a bit more easy than I initially thought.
"Should have breadboarded it first"

Phend

Building a chorus I used this for four cap selections.
Played around with an on off on sw on paper, ended using a rotary


  • SUPPORTER+
Do you know what you're doing?

Phend

#23
Oops I meant 2 resistors , 4 combos..
But same idea,  it can switch 4 anythings

From Bluebunny:
Posts: 7432
Total likes: 4909
Marc B. (UK)
View Profile Bunnylab Personal Message (Offline)

Re: Dimension P - New PT2399 Chorus
« Reply #113 on: March 11, 2023, 12:05:39 PM »
Quote
Quote from: Phend on March 11, 2023, 06:33:43 AM
Does the 4th position turn both sws to off ?

Yes.  So you have:

voices |   dry on    |   dry off
   2   | rich chorus | weird vibrato
   1   | thin chorus |    vibrato
  • SUPPORTER+
Do you know what you're doing?

Ben N

  • SUPPORTER

matopotato

I ended up learning a bit more how Rotary switches work, many thanks @Paul R. !
In the end I got a 2P3T as suggested by @duck_arse, but I wired it slightly differently.
So each of the three settings give me the combinations of caps that I was looking for to do the triple option "mod".
A few wires and shrink tubes and tape hidden below the PCB and it works nicely. Unfortunately the 2P3T switch I got was not only a bit more expensive that I hoped, but it is also a bit glitchy. So I have a new (less costly) one on its way, although I am not sure I want to go through the effort of swapping it.
It is quite useful as far as I have tried it out to choose between +8, +16 or +25 db boost of the mids. (Numbers might not be exact). It make the BITE (and TONE) knob(s) quite productive. I am not so sure the result is very close to the original ones. I compared with a clone of TS-9 and the character of the cirrus is different, more emphasized than the TS-9, but that gives me more options IMHO. Did not try yet to dial in something closer to what a Tube Screamer sounds like, but I think it is there if desire would push me in that direction.

The build is Cirrus by Aion FX. It is based around the ST-9 Super Tube Screamer as well as the STL Super Tube. The difference is the order between the clipping stage and the mid-boost stage. So I put a switch on the outside instead of the internal one. Quite a few wires, but it works, so now it can switch between either one on the fly.
The difference is quite big, but not sure how to describe it

https://aionfx.com/app/files/docs/cirrus_documentation.pdf

Unfortunately I got the orientation of the Diode selection wrong. So now I guess I have to listen instead  ;D








"Should have breadboarded it first"