Topband: K9ay loop not performing

Raoul Coetzee raoulcoetzee at
Wed Dec 11 07:47:17 EST 2019

 Yes Rob, my TX vertical feedpoint was closer to 7 ohm before it being transformed to 50 ohm by means of a auto transformer style bottom coil and tap.
I have used a big fat relay with massive silver contacts, (it was used in a UPS to switch battery banks)  but with the actuator coil wires fed trough a choke. 
So the whole relay was at RF potential, that way you do not need to worry about coil/contact isolation spacing.
Raoul ZS1C

    On Wednesday, December 11, 2019, 2:38:50 PM GMT+2, Rob Atkinson <ranchorobbo at> wrote:  
 Actually, if you have a quarter wave driven element and you are
disconnecting it at the feedpoint, your relay concern shouldn't be
voltage so much as current.  Fast switching and large contact surface
is more important than voltage handling.

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