On 6/13/2025 11:34 AM, Ken WA8JXM wrote:
Not very well. The voltage on a matched 50 ohm line at a KW is only 223v.
On an open wire line presenting 2000 ohms at the arrestor, the voltage is
1400v.
This is really the heart of the problem, and even this value assumes a
matched load. But most two-wire line is used at frequencies where the
load is NOT even close to matched. In his excellent ARRL book on the
topic, N0AX recommended a spark gap at a properly bonded entry panel.
73, Jim K9YC
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