The 111th / Willow Grove A10's use 263.125; not 269.125 which is not a Philly freq, when they fly by my house - thanks Dan. 5/3 log: 5571 USB 0550z KBP 9 / KA 98138 (Boeing Development Center); radio tests using different antennas. Signed off at 0600z. Rich - Reading, PA