I am convinced that there should be a static drain resistor. But since I
don't know anything about this antenna, I cannot suggest a value.
If I owned one, I might even add a GDT (and/or a low-capacitance TVS diode)
in parallel with the resistor, to help prevent damage from close lightning
strikes. They only have about 2 pF of capacitance, IIRC.
Actually, now that I think about it the TVS diode has a much lower voltage
than a GDT (minimum 75 volts). I don't know if any suitable TVS diode has a
20 kA rating like a GDT does.
Only Lee would know whether my ideas here have any merit. :-)
73, Mike
www.w0btu.com
On Tue, Sep 24, 2019, 2:17 PM Mike Waters <mikewate@gmail.com> wrote:
> Can't you install a static drain resistor to keep that voltage from
> building up so high?
>
> 73, Mike
> www.w0btu.com
>
> On Tue, Sep 24, 2019, 2:09 PM Lee STRAHAN <k7tjr@msn.com> wrote:
>
>> Hi Guys,
>> Assuming your verticals have a very good insulator there is NOTHING to
>> stop that input capacitor from charging to very high like kilovolt static
>> voltage levels. What I don’t understand is why leakage in that capacitor
>> would cause any trouble or differences if it were not even there. All that
>> would happen is the vertical would assume about 5 volts DC on the elements.
>> This problem rearing its head would indicate the vertical insulators or
>> something in that path must be compromised as well. Or is the 8055 possibly
>> going in to oscillation with a leaky connection to the element.
>> Something does not add up here.??? What is the clue that tells you the
>> capacitor has failed. Lack of performance/directivity or noise. Noise might
>> indicate oscillation.
>> Lee K7TJR
>> Hi-Z Antennas
>> ...
>>
>>
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