There have been testing reports of only achieving 1-2 mile range over the 868mhz frequency.
during early trials I was achieving max 25km range, so decided to investigate
I compared my original prototypes versus the latest prototypes, and modified the software to run RSSI checks, this allows the receiver to indicate the signal strength in dBm.
Comparing my old prototypes to the new, I was seeing a difference of 8dBm, that is significant!
The main difference was the use of an end launch SMA on the original, and pigtail on the latest.
As an experiment I soldered an SMA onto one of my newer prototypes, and the power loss was recovered.
I need to get back in the air with the modified prototypes to see what range I now see.
I have modded 6 protos so that is a good selection to try out.
So this may be the cause of the shorter transmit range.
It would appear at first glance that the pigtails are quite lossy
Thx
Lee