Switching with relays

[Jrg770]

Wonder if anyone has experience using relays for switching. I have 2 circuits ready to go (matsumin valvecaster and a SS preamp) and would rather pair them in a rack due to the 12au7 valve.
I know how to set this up using 3pdt or 2pdt front panel toggles but foot control would be necessary I think.
I drew up a diagram using relays but could use some help.
Switching includes...
1. Tube bypass
2. SS bypass
3. SS crunch/lead

[Ripthorn]

I did more or less the same thing on a tube amp build several years ago. I did essentially what you did, where either the toggle or footswitch could ground the negative relay coil connection. I did run in to the toggle/footswitch conflict that you have noted on your diagram, for which I used LED indicators. It was fine, but knowing what I know now, I would probably use a microcontroller to handle everything so that there are no conflicts. I'm sure it could be done using analog logic as well, I just don't have much experience with it. As it stands, your scheme appears at first glance as though it should work fine.

[Jrg770]

After analyzing and thinking about it I figure I need to connect the toggle and footpedal outs to a switch. Output of said switch would feed the relays. I think...
I thought of looking into microcontrollers but recommendations lead to arduino. Maybe one day but not any time soon.
Thanks for the feedback