That antenna and down-lead have obviously seen better days. There are one or more broken elements and I suspect that the cable is well weathered. All this adds up to plenty of reason to expect the antenna to be far from it's original tuned state and any signal picked up, may or may not have a path to the tuner. Just some random bit of wire attached to the tuner can act as a crude antenna, but the results will be unpredictable.
If you don't want to take advantage of the free HD and SD programing available to you, I won't waste your time with an antenna suggestion.
But best regards anyway...
