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Terry Gerdes AB5K

[NOTE: Terry is in the process of moving to a new QTH in Bell County, Texas. This is a description of his former QTH in Travis County, Texas.]

AB5K Towers

The station at AB5K has three towers, a 90' rotating tower, a 106' crank-up tower, and another tower (not shown.) The current antenna lineup on the 90' rotating tower is:

  • 20, 15 and 10 meters - Stacked Forece 12 CX31's at 80' and 40'
  • 40 meters - Force 12 EF-240 at 60'
  • 6 meters - Three M2 6M7's at 70', 50' and 30'
  • 2 meters and 70 centimers - DX-Cluster antenna at 90'

Being on top of a hill, the effective height of all antennas is higher than the physical height. In the background is a Mosley Pro-96 (for 40, 20, 17, 15, 12, and 10 meters) on a 106' crank-up tower. Not shown is a tower with an HF antenna fixed to the southeast.

The station uses three WX0B StackMatches. One feeds the six meter stack, one feeds the HF stack, and the third one feeds the three towers (crank-up tower, rotating tower and fixed SE tower). The typical mode of operation is to place the stacked Force 12 CX31's on the rotating tower toward EU in the morning and JA in the afternoon, and use the antennas on the other two towers pointed in other directions to fill in the gaps. Feeding all three towers with a StackMatch allows the "spraying" of a wide azimuth pattern by using two or all three tower/antenna combinations at once.

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Last updated: 8 January 2016