Anyone using an antenna multicoupler (powered or unpowered)? The powered
versions allow multiple receivers to be simultaneously connected to a single
antenna without loss.

Greatest thing since sliced bread. I use a DX-1PRO to feed a halfdozen
receivers in two rooms. The ability to pickup any frequency that got past the
antenna is the greatest attribute.
Side benefit is that you can finally do dside-by-side comparisons.
Also, some lightning protection.
I ONLY use actives with amps after the splitter to prevent interaction. (The
are not for S-38 classs radios).