James: I have 5 outside antennas and just 2 coax lines in to the house. All switching is done outside via coax relays I found on eBay. Each antenna feeds an impedance transformer first, so all switching, as Nick suggests, is done at 50 ohms. Each relay has 4 male BNC connections which could allow me to ground the antenna not in use if I wanted to, but I haven't found this to be necessary. Beside my phaser I have a small panel with switches and indicator LEDs which allows me to switch between antennas and to know which 2 are in use at all times. There's also a small power supply which supplies the 26vdc for the relays, and the 5vdc for the LEDs. Quite complex and not easy to install, but works very well considering one antenna is about 200' from my shack. And the best part, switching between antennas is achieved by just flicking a simple on/off switch and is virtually instantaneous. With recent temperatures going down around 25 below at night, switching the relays hasn't been a problem.
Mike in St Isidore, AB _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
