Monday, May 26, 2008

Five Over Five

Recently I have managed to aquire 2 TH5 DX antennas. The one in the foreground needs a new plastics kit and has suffered from electrolysis. As the saying goes... We can rebuild him. The one in the background (Traps boxed) has a new plastics kit and shows less signs of wear and tear. It is hard to say how old these antennas are but my guess is between 20 - 30 years old. The Thunderbird has a mighty fine reputation with countless stations using them to this day.

The plan is to put both of the TH5's on the tower below. One at 25 feet and the other at 50 feet. I have seen a couple of ideas for a matching network but I do not like either of them. I have a few ideas of my own that I may expand on later. It is going to take a few rainy day missions in the garage to clean them up. As with the TH3DX I have I will take to the TH5's with a wire brush (Brackets) and a poly pad (Pot scrourer). The TH5 has an average gain of 8.5db. Stacking a pair of them will add 3 - 4 db. Giving a total gain of around 12 db. Add 500 watts of RF and I will be one of the stronger stations in NZ on 20, 15 and 10 meters.

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