Could someone please tell me how I could check the power amplifier on my Terk55 antenna with a meter. I statred having problems with the reception and I don't know if it's the power amplifier or the antenna.
I'm assuming you mean the power supply.
Place one probe on one of the wires, the other probe on the other wire, and read the voltage.
If you or a friend has a multimeter, test the DC output voltage of the power supply. Set to "DCV" and place the red probe on center and black probe of the outside. If it reads ~ 9VDC, the power supply is good.
If your reception suddenly went to crap and the power supply tests "good", then the amplifier (the bullet/injector) is bad.