How to make Power Forge?

[Lopy]

Where to get solenoid? I know you need it with a zapper to create Chorus Solenoid.
But how do you even get solenoid in the first place??

[Grog Grueslayer]

If you add the gold bar to your collection you can make a wire and add that to the collection as well and you should see the Solenoid recipe on the heavy workbench.