I was looking through some stuff at Princess Auto today and came across a 5Mhz - 2.4Ghz Splitter / Combiner from T2 Signal Management model number SP-4 for $10. The owner manual in the box notes that T2 is (was) a part of Terk Technologies.
Terk - SP4 - T2 4 Way Splitter/Combiner
Super-wide bandwidth 5Mhz-2.4Ghz, accommodates all RF, IF, and satellite radio frequencies, rugged all aluminum construction and sealed waterproof housing, high quality internal circuit board design, structured enclosure modularity, DC and IR passing.
There's hardly anything on the web about this Splitter / Combiner so I thought I'd post some info in case someone else ever comes across one of these. I think T2 was setup to supply products to installers of custom high-end audio / video installations. It is amazing what ends up at shops like Princess Auto.
I plan on combining the signal from a UHF antenna, a VHF antenna and the output from a satellite receiver and send it through to all TV's in the house. The satellite receiver will only be used for one channel so I think this has a good chance of working as planned.
It looks like you can have 1 in and 4 outs or 4 in and 1 out.
The info might be of interest to somebody somewhere.