Spark gaps are much cheaper.
And nobody uses load variables made for 5 or 6 KV with a simple Pi net.
73
Peter
-----Original Message-----
From: Amps [mailto:amps-bounces@contesting.com] On Behalf Of Bill Turner
Capacitors don't arc at the RMS voltage. They arc at the peak of the RF
cycle. For 1500 watts into 50 ohms, the peak is about 387 VAC. And that's
with a 1:1 SWR.
A high SWR can cause voltage nodes many times the normal voltage to appear
on the coax, and if the coax is just the wrong length, one of those nodes
may appear right at your load cap. Have you ever transmitted into the wrong
antenna?
IMO, padder caps rated at 5 or 6 kV are NOT overkill.
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