[TowerTalk] Antenna loads for bench testing

[n0tt1 at juno.com]

On Fri, 15 Feb 2019 15:37:40 -0800 "Richard (Rick) Karlquist"
<richard at karlquist.com> writes:
> 
> 
> On 2/15/2019 2:01 PM, n0tt1 at 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