14-10-2018, 23:00
Hi engolling
From my experience with those modules, increasing voltage above 9V brings more problems than solutions, specially frequency shifting. Also they don't last so much when powered by 12V.
When I saw the metal box you have designed for housing the two TX units one thing has bring to my mind: he will have to use an coaxial extension between the SMA connector on the TX board connector and the antenna. Be careful with this approach, attaching the antenna directly to SMA connector on the TX board is always the best.
If you would like to experiment with a different transmitter module, try this one:
H34C 433Mhz ASK MINI RF Wireless Transmitter Module
The pinout isn't compatible with the TX board, but it isn't difficult to adapt. I'm experimenting these small modules since months, and found they are more stable in terms of frequency shifting.
From my experience with those modules, increasing voltage above 9V brings more problems than solutions, specially frequency shifting. Also they don't last so much when powered by 12V.
When I saw the metal box you have designed for housing the two TX units one thing has bring to my mind: he will have to use an coaxial extension between the SMA connector on the TX board connector and the antenna. Be careful with this approach, attaching the antenna directly to SMA connector on the TX board is always the best.
If you would like to experiment with a different transmitter module, try this one:
H34C 433Mhz ASK MINI RF Wireless Transmitter Module
The pinout isn't compatible with the TX board, but it isn't difficult to adapt. I'm experimenting these small modules since months, and found they are more stable in terms of frequency shifting.