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How to switch transistors?
Posted: Sat May 07, 2011 4:24 pm
by jfrey
I thought I had seen a thread on this a while ago but I couldn't find it.
How do you wire a switch to swap between 2 different transistors?
Re: How to switch transistors?
Posted: Sat May 07, 2011 4:29 pm
by Scruffie
You can either use a 3PDT Toggle with a Transistor on each side and the three centre wires going back to the board (The easier and cleaner way in my opinion)
Or you can wire a DPDT and tie both Bases together as a Common lead back to the board and just switch between the Collector & Emitter of each transistor on either side of the DPDT.
Re: How to switch transistors?
Posted: Sun May 08, 2011 1:51 am
by Jero
If you needed to swap more than one thing, could you not use a 3pdt, wired like a dpdt, and use the extra lugs for a second component?
Re: How to switch transistors?
Posted: Sun May 08, 2011 8:23 pm
by jfrey
What should I swap the 2n2222a with?
Re: How to switch transistors?
Posted: Sun May 08, 2011 8:39 pm
by Scruffie
Jero wrote:If you needed to swap more than one thing, could you not use a 3pdt, wired like a dpdt, and use the extra lugs for a second component?
Yes you could
jfrey wrote:What should I swap the 2n2222a with?
Dunno... what's the pedal? Try an MPSA13 for some ultra high hFe.
Re: How to switch transistors?
Posted: Sun May 08, 2011 8:46 pm
by jfrey
It's an overdrive / fuzz.
Here's everything I have:
MPSA18
2n3906
2n2907
2n4403
2n5089
MPS2222A
2n3904
2n5457
MPF102
I also have 2 that I'm not sure what they are. They're 2 or 3 times bigger than any of the others.
Re: How to switch transistors?
Posted: Sun May 08, 2011 9:08 pm
by Scruffie
I'd go with either the MPSA18 or 2N5089.
Re: How to switch transistors?
Posted: Sun May 08, 2011 9:16 pm
by jfrey
Any idea what these big ass ones are?
One says 34398P on one side of the top, and 6532 on the other side of the top.
The other says 112001, and VFE.
Re: How to switch transistors?
Posted: Sun May 08, 2011 9:20 pm
by Scruffie
Not a Clue, Sorry.
Re: How to switch transistors?
Posted: Tue May 10, 2011 8:59 am
by eatyourguitar
I got some big NPN's if you want to compare
Re: How to switch transistors?
Posted: Tue May 10, 2011 10:48 am
by McSpunckle
jfrey wrote:Any idea what these big ass ones are?
One says 34398P on one side of the top, and 6532 on the other side of the top.
The other says 112001, and VFE.
Maybe it's a 2N6532? That's an NPN Darlington power transistor. They're in that bigger package with the mount for a heat sink..
I googled the 112001 and got a bunch of stuff about 9/11, so I think that second one might be a terrorist.
Re: How to switch transistors?
Posted: Tue May 10, 2011 11:13 am
by Jero
McSpunckle wrote:I googled the 112001 and got a bunch of stuff about 9/11, so I think that second one might be a terrorist.
Hahahaha
Re: How to switch transistors?
Posted: Tue May 10, 2011 11:55 pm
by Here Lies The Fire
McSpunckle wrote:jfrey wrote:Any idea what these big ass ones are?
One says 34398P on one side of the top, and 6532 on the other side of the top.
The other says 112001, and VFE.
Maybe it's a 2N6532? That's an NPN Darlington power transistor. They're in that bigger package with the mount for a heat sink..
I googled the 112001 and got a bunch of stuff about 9/11, so I think that second one might be a terrorist.
I might just siggy this..
