On Fri, 15 Feb 2019 15:37:40 -0800 "Richard (Rick) Karlquist"
<richard@karlquist.com> writes:
>
>
> On 2/15/2019 2:01 PM, n0tt1@juno.com wrote:
>
> >
> > The question is, if a builder wants to make "loads" for bench
> testing
> > (to simulate the actual antenna feed point impedances), how is
> the
> > negative
> > load resistance simulated? If there is, say an impedance of -27 +
> j3.0
> > Ohms,
> > does the builder just ignore the negative sign of the resistive
> part of
> > the load
> > and use a 27 Ohm resistor in series with the required amount of
> inductive
> >
> > reactance or what?
> >
> > Thanks,
> > Charlie, N0TT
>
> No, you definitely can't ignore the sign of the resistance.
>
> See this construction article about how to realize a negative RF
> resistance:
>
> http://www.vk6fh.com/vk6fh/lambda_diode.htm
>
> VK6FH shows how to use this to make a "Tunnel Dipper"
> without the tunnel diode, but you can repurpose.
>
> Rick N6RK
Thanks very much, Rick! I've printed out that info and I'll
study it carefully.
73,
Charlie, N0TT
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