[GreenKeys] Loop power supplies

[drlegendre .]

Yeah, now I see what's going on. In the quiescent state, the tube is biased
fully 'on' but it only conducts minimally through the 100K pot load. One it
begins to conduct current, the bias begins to change but in a non-linear
fashion. The tube is intentionally being operated in a non-linear way such
that it remains more fully 'on' until the current reaches a certain set
point at which it is held in equilibrium by the bias scheme.

On Mon, Mar 5, 2018 at 5:56 AM, Jeffrey Angus <jdangus at att.net> wrote:

> On 3/5/18 4:50 AM, Nick England wrote:
>
>> I think the pass tube isn’t equivalent to a fixed value resistor.
>>
> The word you're looking for is "In place of."
>
>> The effective R is higher at turn on, lower at steady state.
>>
> That's backwards.
>
>> So snappier RL time constant?
>>
> Due to the much lower R at turn on.
>
>> Note the grid bias pot is across the load.
>>
> Which is why it has to be readjusted every time the load changes.
>
>
>
> --
> "I am a river to my people."
> Jeff-1.0
> WA6FWI
> www.foxsmercantile.com
>
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