In the end, I got both an RX v5.02 PCB and an RX+ v1.3 PCB, thinking I'd build more than one receiver, perhaps in future to use in systems at different locations.
Looking at them confirms what was said above by AllanG and Werk_AG:
- the RX+ is a bigger, more complex (more traces, holes, contact points) board than the RX
- the RX+ has several components pre-soldered onto the board, including surface-mounted passive components (resistors, capacitors), whereas the RX needs to have through-hole passive components added. These passive components are cheap to buy, but the extra time (=cost) taken to fit them to the RX+ is clear.
- the RX+ includes a wifi chip
I can also understand that the RX+ is being sold with a modest and entirely justified mark-up.
All boards seem to be top quality.
Looking at them confirms what was said above by AllanG and Werk_AG:
- the RX+ is a bigger, more complex (more traces, holes, contact points) board than the RX
- the RX+ has several components pre-soldered onto the board, including surface-mounted passive components (resistors, capacitors), whereas the RX needs to have through-hole passive components added. These passive components are cheap to buy, but the extra time (=cost) taken to fit them to the RX+ is clear.
- the RX+ includes a wifi chip
I can also understand that the RX+ is being sold with a modest and entirely justified mark-up.
All boards seem to be top quality.