will be conducting an antenna experiment w/575 machine in the near future to see if there is any real difference in pattern and range vs cost. RSSI readings at fixed locations have been taken this week. waiting for the Comtelco antenna to show up.
all things being equal the only change will be the antenna itself.
the antennas will be a Laird 5dBd($150) currently in service
Comtelco 6dbd ($200)
PD 201 5 dBd ($450)
the Laird is physically the smallest one, the other 2 are roughly the same size/weight.
will post pics of the 3 together.
not looking for radical results but it should be interesting.
ground elevation ~150'