tylernt:
Riva:
I'm wondering if I can power the TX modules at more than 5V, let's say 9Volts, in order to increase TX range.
I have not seen a datasheet to check if this would increase RF power but normally countries only allow these free spectrum devices to work up to a specific output power and this may be fixed within the chip.
Presumably, the transmitter radiates the maximum legal ERP at 12V. At lower voltages, it probably radiates less.
No such guarantee - the 433MHz and other ISM bandplans differs from territory to territory, and in particular I recall the max duty
cycle and max power vary across these band in very specific ways - it is your responsibility to stay within the limits for
your territory.