The Thunderbirds didn't approach the airfield via the usual glideslope, so I didn't see them. The only frequency for their show was 141,075 AM, heard from the start about 3:15p. Last transmission was around 3:50p. No other Thunderbird frequencies heard. I was listening on the VX6 ht, and scanning the entire group of frequencies with the -106. Judging from the strong signal levels I would guess flight levels were at a minimum 2k feet. Those flyboys and -girls are quite some characters on the radio.