New
#11
Strange that one other active Router especially on another Channel can knock you off your router , I am not familiar with fixing that issue.
Did you try the opposite though ? ie turn your Gain DOWN so it only Broadcasts far enough for your family members to use it ?
Perhaps look at 3rd Party Firmwares like DDWRT or OPen WRT if the Router will accept them ? or at least ask on their Forums about this issue.
I'd have thought high gain antennas weren't that cheap either ?