SPST Feedback Loop for Magnetron-Use Normally Closed or Open Switch?

[Champagneperfume]

I'm looking to buy a SPST momentary footswitch for a feedback loop mod and I'm a bit confused. Should be purchasing a "normally closed" SPST or a "normally open"? I can't seem to figure out which one is the correct one for this mod. Thanks!

 

[Diynot]

If you are looking to do the oscillation mod, you will want a “normally open” foot switch

 

[Champagneperfume]

If you are looking to do the oscillation mod, you will want a “normally open” foot switch

Ok awesome, thank you.