2 wrote:
>>> The burst of grid/cathode current that accompanies a vhf parasite
>>> creates an EMF that can bend the hot (1820?K) filament perpindicular to
>>> the flow of grid current.
>>
>>Wouldn't this be describing some sort of a 'magnetic' event associated with
>>the current spike caused by the parasitic event?
>>
>Yes, electric current is accompanied by an EMF.
>
>> I always thought that EMF was a description of force resulting from a
>>difference in potential; with watt-seconds or some similar descriptor used
>>to describe the actual discharge event.
>>
>EMF is proportional to electon flow.
>
>> I believe other terms are used to refer to a magnetic pulse event, such as
>>EMP.
>
>A pulse of current produces a pulse of EMF. A nuclear explosion
>produces a large EMP.
One of you is talking about electromotive force, the normal meaning of
"EMF".
The other is talking about an electromagnetic field, usually abbreviated
"EM field".
--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek
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