I use two of these for that antenna. Mounted to the back of my computer desk.
(Click on the 'Shack Photos' icon above to see an older photo of the desk)
But, in that case, I'm not using the Holland preamp shown in this photo .
The LNA-1000 preamp is mounted right at the base of the ST2 antenna at 35'.
All coax is RG6 (solid copper center conductor) using PPC EX6XL compression fittings
Feed line length from the antenna is around 70'.
Frequency Range: 10-1000MHz;
Noise Figure: 2dB at 500MHz
Gain: 30dB at 1GHz
DC Voltage: +9 to 15V
SMA Female Connector