So..................as they dont make 12PDT foot switches!?

[carboncomp]

Was having a conversation today about the best way to do something a little extreme, have a muff with a switch that would select between 2 sets of transistors.

I was thinking a 12PDT Latching Changeover Push-Push Switch (if they even make them!) may work, but would love to hear other peoples thoughts on here.

[Joe]

You can probably use some relays for that. You can drive a DPDT relay with one transistor, I used a couple for some channel switching once with something like this:

[Earthscum]

Actually, think about a transistor as being 2 diodes. If you look at an NPN, one diode (Base to Emitter) is forward biased. The other (Base to Collector) is reversed biased. All you should need is a 4PDT to switch the sets of Emitters between "IN" and pulled to V+ to reverse bias both diode junctions. Then you're only left with the leakage of the reverse bias. Not really sure if it would work, but in theory it makes sense. 

[PRR]

You could use multiple 2P2T relays.

At some point it makes a lot more sense to build two Muffs and a simple A/B switch.

[CodeMonk]

You could have a look here at one of RG's articles : http://www.geofex.com/article_folders/cd4053/cd4053.htm

[LucifersTrip]

They make rotary switches that are 12+DT, but they are usually pretty expensive and usually have many tiers, like:
http://www.goldeno.com/pictures/Img07256.JPG
http://www.ebay.com/itm/Janco-54-1917-19200-11732688-2-MOM-12PDT-Rotary-Switch-/190669125791?pt=LH_DefaultDomain_0&hash=item2c64c3f89f

if you haven't seen em, I had em in my last garage sale (#30, 51, 52)
http://www.diystompboxes.com/smfforum/index.php?topic=90624.msg846795#msg846795

[Perrow]

I pulled a 27P4T rotary switch out of a KVM (keyboard, video, mouse) switch found in the recycling bin, and another massive switch from a printer switch.

[carboncomp]

They make rotary switches that are 12+DT, but they are usually pretty expensive and usually have many tiers, like:
http://www.goldeno.com/pictures/Img07256.JPG
http://www.ebay.com/itm/Janco-54-1917-19200-11732688-2-MOM-12PDT-Rotary-Switch-/190669125791?pt=LH_DefaultDomain_0&hash=item2c64c3f89f

if you haven't seen em, I had em in my last garage sale (#30, 51, 52)
http://www.diystompboxes.com/smfforum/index.php?topic=90624.msg846795#msg846795

Have you sold them all?

[LucifersTrip]

They make rotary switches that are 12+DT, but they are usually pretty expensive and usually have many tiers, like:
http://www.goldeno.com/pictures/Img07256.JPG
http://www.ebay.com/itm/Janco-54-1917-19200-11732688-2-MOM-12PDT-Rotary-Switch-/190669125791?pt=LH_DefaultDomain_0&hash=item2c64c3f89f

if you haven't seen em, I had em in my last garage sale (#30, 51, 52)
http://www.diystompboxes.com/smfforum/index.php?topic=90624.msg846795#msg846795

Have you sold them all?

No, I still have those 3. I try to update right when something goes, so the last post in the thread should be up to date. #29 and 3 others from an older list are gone, but I think there are a few more I haven't listed yet...