Since there are two models and a few revisions for the RX-65 it would be useful to know which revision and model (FCC ID) you have, and the performance of your unit.
FCC ID Info per Jimbonzzz (on the bottom of the unit)
QL4G7M4 = Newer Version (After 1/2005 ?)
QL4G1S7 = Older Version (Before 2/2005 ?)
and Revision # 4.5, 3.6
keep in mind some members claim the older 3.6 was the better performer, so newer doesn't always equal better or improved.
4.3, 3.2, 2.9 are some of the earlier revisions .
Also please note if yours was purchased from an authorized reseller or an ebay special.
This could provide some valuable feedback.
The settings you use could also be helpful to know.