Neighbor covenants and restrictions on extrnal antennas can severly limit amateur radio performance. When we were house hunting for the move back to Texas, I looked at quite a few attics as well as elevation maps. Austin is located on the edge of Texas "hill country"; so, it is not flat. We found a that met all our other requirements and is located on top of a 1050' ridge. I was looking for large attics with high cielings and did not want foil backed reflective roof surfaces. After the move from Portland, the work began with installing plywood flooring, lighting, and power in the attic space. This was no picnic in the Austin summer temperatures! The den on the ground level of the house is my radio shack. I was able to find a chase in a wall at the end of a second floor hallway that allowed coax and rotor feeds to run in PVC conduit from the attic to the den. Feeds to the UHF and 927 MHz repeaters are routed to the second floor home brew & test room.

The current residents of the antenna farm are as follows:
      10 GHz operation with a 1M X .65M offset feed dish with LNA and PA mounted at feed point,
      HF operation with a loop of 0.25" copper tubing around the perimeter of the house feed by a 10KW CWS 4:1 balun (QRO OK),
      6M operation with a circular collinear omni - the pattern is H-polarized and very similar to a "Big Wheel",
      144 MHz and 432 MHz weak signal operation with an array of three stacked short-boom log-periodic beams,
      222 MHz weak signal operation with a helical collinear omni (6 turn helix) - the pattern is mostly H-polarized,
      222 MHz beacon operation with stacked K5VH "Super Wheels" (Big Wheels with folded dipole radiating elements),
      902 MHz weak signal operation with an M2 17-element Yagi,
      902 MHz weak signal operation with a helical collinear omni (11 turn helix) - the pattern is mostly H-polarized,
      1296 MHz weak signal operation with a pair of stacked M2 22-element Yagis,
      1296 MHz weak signal operation with a helical collinear omni (15 turn helix) - the pattern is mostly H-polarized,
      902 / 927 MHz FM operation with 6 dB Scala V-polarized omni,
      902 / 927 MHz FM repeater operation with 9 dB Scala V-polarized omni (100W repeater on site),
      443 / 448 MHz FM repeater operation with 6 dB Phelps-Dodge V-polarized omni (100W repeater on site),
      70cm FM link (927 repeater) operation Diamond X-50 V-polarized omni,
      70cm FM link (EchoLink / K5TRA-R) operation and 2M remote base - Diamond X-50 V-polarized omni,
      2M / 70cm FM operation Diamond X-50 V-polarized omni,
      2M / 70cm FM operation (yes, another) Diamond X-50 V-polarized omni.

The attic amtenna farm also has remote switching for 902 & 1296 Yagi or OMNI selections, as well as the 222 MHz beacon and remote (TCPIP) ON/OFF control. Due to the limited number of 9913 coax runs, several crossband couplers (band split diplexers) are used to share runs.



SOME ATTIC ANTENNA PHOTOS



Stealth Antenna Farm     Presented at Austin Summerfest - August 2013