Anyone have any ideas on how to remotely switch balanced lines. The idea being to have 2 dipoles/doublets on a tower with one balanced feedline running to the shack and be able to switch the feedline
Assuming you want to fabricate something: Double pole double throw relay, coil operated by DC carried on the feedline, decoupled with a choke. Use any of the relays that folks use in antenna switch b
You will want to have something better than the type of relay used to switch 50 ohm coax though. 1500 watts at 50 ohms is 273 volts. 1500 watts at 600 ohms is 948 volts and that is providing the swr
And those are RMS voltages... what you need to be thinking about here is peak voltage. The relays used in most amateur market antenna switches are usually AC power relays of one sort or another. Gran
There are still some "old time" open-frame RF relays available from Eastern Europe, for example: RF Relay: Open frame 2 position relays. Using a pair of these relays it is possibly to build 5 bands s