>R. Measures wrote:
>>
>>
>>>R. Measures wrote:
>>>>** The grid does not and can not draw current when a competent
>>>>operator sets the grid potential just above the level where it can draw
>>>>grid-current with the max PEP drive that's available.
>>>
>>>That is only true if the grid input circuit is guaranteed to be able to
>>>soak up all possible levels of drive without allowing grid current...
>>
>>** So you are essentially saying that if the grid terminating resistor
>>is blown away by the exciter, the grid driving potential could rise to a
>>higher level and grid-current could flow? Although this seems possible
>>with exciters that do not have an SWR-foldback, I have not seen such,
>>Ian. Have you? Would not such a scenario require that the
>>grid-terminator be grossly undersized?
>>
>No, I didn't say any of that - you said all of it yourself.
>
** A grid-terminator R either soaks up the power or it don't. If it
doesn't soak, it's croaked.
- If the grid-terminator is present and intact it presents the design
impedance at the grid over the full range of input power. If the grid
draws current, a competent operator knows to either reduce the power-out
limit on the exciter - or to increase the DC grid bias potential and
increase screen potential to restore the recommended ZSAC..
>Likewise most of what followed bore no relation to what I actually said.
** What did you have in mind regarding the terminating R not being able
to absorb power, Ian?
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