Jim Miller wrote:
> Rain, interesting thought. Can they be mounted horizontally so the raindrop
> will not tend to close the gap? OR the contacts separately mounted up at 45
> degrees with the contact points of EACH pointed up so the rain will run away
> from the spark gap? Can they be shielded? With a plastic soda bottle or a
> plastic kit box?
>
> I haven't seen these things but have been considering one and the pictures
> seem to be from a museum or belong in a dungeon or something.
>
> 73, Jim
>
Arrange em any old way.. you're looking at something to short on a 10kV
potential at 10kA.. On high power MW broadcast, they use sphere gaps
because the actual RF voltage is pretty high. At 1.5 kW on a ham rig
feeding a 1/4 wave monopole with 35 ohm impedance.. You're not talking
kilovolts here.
plastic bottle if you want is fine. Horizontal gap is fine. If a
raindrop happens to bridge it when you're keydown with the high powered
active antenna tuner at 5kVA, the raindrop vanishes in the blink of an eye.
If you live in a frost/snow area, that's more of an issue.
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