Re: Negative Resistance

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <teslalist-at-qwest-dot-net>" <davep-at-quik-dot-com>


>I am wondering how a spark gap compares to a lambda diode.
>Both are "negative resistance" devices;
>with spark gap increase in current coincides with decrease

>in voltage.

>It is also possible to have an increase in voltage coincides with decrease 
>in current-
>is this also negative resistance?

         I would say yes.
         Resistance is defined (can be defined....) as the
         slope of the e-i plot.

>Is this not what happens with the lambda diode and also with

>the tunnel diode?

         I'd say not.
         Common _effects_ may have different _causes_.
         The behaviour of an arc is a result of the properties
         of ionized gas.

         The behaviour of tunnel diodes has to do with
         solid state physics and quantum effects.

>Is this behavior the same or different to the spark gap?
         Depends, i should think, on the exact definition of

         'behavior' and of 'same'.


         best
         dwp

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         Vernor Vinge
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