For the 2016 ARRL Phone Sweepstakes,  K7IR used three SteppIR Antennas (of course):

Tower 1:

• SteppIR DB-42 @ 72 feet
• SteppIR 4 element Yagi @ 37 feet

Tower Trailer:

• SteppIR DB-32 @ 86 feet

 

Operators were K7IR, WA7IR, K7XH, N7QT, K7BTW, and N9ADG