Originally Posted by Calaveras
This and the next post is making it sound like a diplexer is some exotic item. It is not. It is a very common item and is THE way to combine two antennas that cover different frequency ranges. We use them in ham radio all the time to combine 2 or even 3 antennas (the latter is a triplexer) or to combine a radio with multiple outputs for an antenna that covers muliple bands.
If you use a simple splitter/combiner for two different frequency range antennas you'll introduce 3 dB of loss + insertion loss, perhaps another .5 dB. A diplexer will only introduce insertion loss, probably less than .5 dB.
If you define exotic to mean that I can't get it at most Wal-Mart, Home Depot, Best Buy, or even Radio Shack, then yes, exotic might fit. But those are your words. I don't disagree that the "diplexers" are available and from good places. I certainly endorse ordering from Solid Signal. I've had very good experience with them -- particularly with specialized UHF/VHF antennas and combiners.
Calaveras, there is no need to knock a suggestion just because it MIGHT not work unless it somehow appeared to mislead someone. If you want us to all admit you probably know more because of your ham radio experience, I'll stipulate it here. If you want a monopoly on providing helpful suggestions (especially if that might save someone a few days in waiting on something to arrive mail-order when they could have tried something immediately that might or is even likely to work), look elsewhere.
In many cases, a 15db gain antenna picks up more useable signal than a 10db gain antenna. But, if the signal is reliable with the 10db gain, why argue the point that 15db is better?
There is no "THE" way to do this. There are ways that work, and ways that don't -- and some ways that work in some situations, but not in others. Thus, "THE" way for the OP to combine antennas is THE way that works for him/her. THE way for me, is the solution in which I didn't have to order a combiner - I just used the plain ole splitter/combiner that I had laying around. This might even work for the OP.