I'd recommend using Schall Virtual Signal mod.

That mod adds A LOT of new virtual signals.

Just feed the signal you want to 'modulate' through an Arithmetic combinator set to * 1, then `demodulate` it on the consuming side with another Arithmetic * 1.

Background

Since "Space Age" is implemented as a mod, and not compatible with vanilla's save, I found that I have to enable/disable mods as needed to concurrently play a game in "Space Age" / continue my sprawling base in Vanilla.

The problem is that enabling the "space-age" mod => need to ...