Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kriswel on August 28, 2010, 08:15:04 pm

Title: PI Switch
Post by: kriswel on August 28, 2010, 08:15:04 pm

Been a while. My head has been lost in regular life for a while, but I have some amp projects back on the go.

If I want to switch between a Concertina PI and a Schmitt PI with a 3PDT would I ground the opposing input or switch the output signal wires? I would like to keep one paddle to switch the NFB loop if I can.

Kris

Title: Re: PI Switch
Post by: Merlin on August 29, 2010, 02:53:56 am

Why limit your self to only two options?  :wink:
http://i81.photobucket.com/albums/j207/merlinblencowe/SwitchablePI-1.jpg

Title: Re: PI Switch
Post by: kriswel on August 29, 2010, 05:19:17 pm

that's great help thanks!

Title: Re: PI Switch
Post by: kriswel on August 29, 2010, 07:12:33 pm

Should that switch on the plate not have a cap in front of it so it doesn't have hi voltage on it?

Title: Re: PI Switch
Post by: Merlin on August 30, 2010, 02:56:34 pm

Quote from: kriswel on August 29, 2010, 07:12:33 pm

Should that switch on the plate not have a cap in front of it so it doesn't have hi voltage on it?

High voltage on the switch won't do it any harm. It'll will make a loud pop sound when switching, whether there is a cap or not.