[Amps] RF ground

[Richard]

>
>
>Richard wrote:
>
>> >
>> >
>> >Richard wrote:
>> >
>> >>
>> >> €   I use a Hertz antenna  (end-fed multi half-wave; high feed-Z).  Equal
>> >> currents flow into the antenna and the antenna tuner ground.  The lead to
>> >> the ground system is 5' of two-inch wide copper strap (c. 200nH of
>> >> inductance).  Thus, there is an RF voltage drop across the tuner ground
>> >> lead.  If the tuner ground is connected to the radio ground, the radio
>> >> becomes hot with RF.  I installed a coaxial choke balun to prevent RF
>> >> from going back to the radio.
>> >
>> >If you got an 18 kA lightning strike the voltage on the ground at your 
tuner
>> >would rise to around 18 kV due to the impedance of the 5 foot ground lead.
>> >That is assuming you had a perfect ground at the other end of the strap