OK, thanks a lot everyone for the info. So far my working theory is:
1. Dual band remote controls will have 2 LED diodes, one for each frequency (?).
2. Single band receivers are therefore incompatible with dual band remotes. A dual band receiver is needed.
So after much searching I found this unsatisfactory dual band solution found here:
(forum won't let me post urls yet, sorry)
Only 2 emitters!
So now I am wondering if I did this:
Dual band receiver to 3mm to this wall jack, then to Cat6 (30' run) to the partner wall jack, then from the emitter 3mm ports to a dual band compatible hub (with male to male 3mm wire) and then from this hub to multiple emitters.
I figure the 3mm and cat is just providing a longer connection between the receiver and hub.
Anybody see any flaws in this plan, kludgy as it is?
I am surprised I am having so much trouble with a 30' dual band solution, that there is no packaged solution for this.
Interesting IR link for those interested, though there is no discussion of dual band.
(darn, can't post urls yet)