[Amps] AL-80A troubleshooting

[Ian White, G3SEK]

2 wrote:
>>> The burst of grid/cathode  current that accompanies a vhf parasite
>>> creates an EMF that can bend the hot (1820ºK) 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