The antenna at W0ZSW is a 200 foot long double extended Zepp, otherwise known around here as a “W0OXB Special”. It is fed in the center with 450 ohm ladder line to a current balun. The current balun transform impedance and also allows us to match 50 ohm coaxial cable – a very short run of just a few feet to a manual antenna switch and an LDG AT-200Pro automatic antenna tuner.
The antenna must be tuned to receive and transmit properly, so the LDG takes care of that when RF is applied. Tuning takes up to 10-15 seconds if a frequency has not previously been tuned. Once the LDG has automatically tuned a frequency, it is memorized and tuning is nearly instantaneous.