Bryan WA7PRC
80/160m Antenna Relay
With the use of a vacuum relay in the feedline, the 80m inverted vee dipole can be operated as a top hat vertical on 160m. The feedline is about 85' long and the two legs of the inverted vee are 65' long each. With about a dozen 50 to 83' radials, this is conveniently within the range of my TS850SAT's antenna tuner but, when I get a round tuit, I'll still be adding a LOT more wire in the radial field.
The feedline from the shack supplies 13.8VDC to the relay from a "bias tee". A choke (a few hundred uH) and a couple of 0.1uF/6KV disc ceramic capacitors provide the decoupling.
The box wasn't perfect. I did some creative "carving" and filling inside. Thankfully, PVC can be worked fairly easily with woodworking tools.
80/160m Antenna Relay
With the use of a vacuum relay in the feedline, the 80m inverted vee dipole can be operated as a top hat vertical on 160m. The feedline is about 85' long and the two legs of the inverted vee are 65' long each. With about a dozen 50 to 83' radials, this is conveniently within the range of my TS850SAT's antenna tuner but, when I get a round tuit, I'll still be adding a LOT more wire in the radial field.
The feedline from the shack supplies 13.8VDC to the relay from a "bias tee". A choke (a few hundred uH) and a couple of 0.1uF/6KV disc ceramic capacitors provide the decoupling.
The box wasn't perfect. I did some creative "carving" and filling inside. Thankfully, PVC can be worked fairly easily with woodworking tools.