Hi guys,
I was thinking, is it possible to switch between 2 different transitors in a circuit with a 3PDT?
Or will there be issues, doing it this way?
Thanks...
I'm pretty sure beavis has done this....................
same as doing it with a toggle, only you're stepping on it...
I would imagine you'll get some crazy popping, so it may not be appropriate for the gig.
I wouldn't see a whole lot of value in making it a footswitchable parameter. a toggle is a fine idea though.
Quote from: tcobretti on January 29, 2010, 11:00:19 PM
I would imagine you'll get some crazy popping, so it may not be appropriate for the gig.
Yeah, that was also my first thought.
Quote from: jacobyjd on January 29, 2010, 11:03:01 PM
I wouldn't see a whole lot of value in making it a footswitchable parameter. a toggle is a fine idea though.
I agree.
You only need a DPDT to switch between transistors, as you can keep the emitter (or base or collector, i'm not sure it would matter) of the two transistors connected all of the time. I used a sub-mini toggle for switching, and the is a small pop, but nothing insane. Here's the schematic of the FuzzFace clone I was switching transistors on. (http://www.instructables.com/files/orig/FYB/VCK8/FYNTACN7/FYBVCK8FYNTACN7.gif)
Using a 4pdt may be usefull if your Hfe are differents (you will need two more biasing resistors of different values).
See that topic:
http://www.diystompboxes.com/smfforum/index.php?topic=73259.0
I guess a small pop upon switching isn't too bad.
Quote from: Paul Marossy on January 30, 2010, 09:35:28 PM
I guess a small pop upon switching isn't too bad.
Yeah... depends on the circuit and setup as well.
Quote from: Paul Marossy on January 30, 2010, 02:30:27 PM
Quote from: jacobyjd on January 29, 2010, 11:03:01 PM
I wouldn't see a whole lot of value in making it a footswitchable parameter. a toggle is a fine idea though.
I agree.
Where did I mention that I want to use a footswitch? ???
Thanks for the answers. Indeed a 4pdt is even better. Thanks for that idea!!!
Quote from: carrejans on February 01, 2010, 06:12:20 PM
Where did I mention that I want to use a footswitch? ???
lol not sure why i thought that! sorry... :D