How difficult would it be to refactor a TIP10RF for 310mhz use. Would it be expensive to retrofit.
Miniturization and Surface Mount Technology make DIY rework difficult these days. As I recall, the SAW resonator was about 5mm x 5mm with contacts under the package. It would require a hot air gun with a vacuum tip and even then there was a risk of dislodging nearby components. Although I had the necessay tools, I decided it was too risky. It was obviously outside the skillset of most X10 users. Cost would have been minimal - just the replacement SAW resonator.
For those in US/Canada wanting WiFi control of X10, it was easy to convert RF transceivers (TM751, RR501, etc.) to 433.92MHz for use with a TIP10RF. That just required installing a through-hole a 433.92MHz resonator into existing solderpads.
It would have been simple to manufature a 310MHz version but would have required FCC testing.