That looks just like mine!
I have a pre-amp mounted inside the PVC right at the antenna.
A bit of over-kill but it's fun.
RF Bay, Inc LNA-580 amplifier: 0-580MHz High IP3 LNA, NF=0.7dB
Frequency Range:10-580MHz;
Noise Figure: 0.7dB at 250MHz
Gain: 23dB at 250MHz
P1: +19dBm
IP3: +33dBm
DC Voltage: +5V/70mA
SMA Female Connector
Rich