Joel Kolstad wrote:
Hi Dave,

"Dave Platt" wrote in message
...

One of the recipes for making stable, friendly, and reproducible
designs at RF seems to be to minimize the impact of parasitic
reactances.


Certainly true, although my feeling is that 'ugly' construction above a ground
plane creates _well controlled_ parasitics that tend not to change much based
on, e.g., waving your hand above the PCB, mounting the PCB close to a metal
chassis, etc.

My experience is that the most common and troublesome parasitic
reactance in modern solid-state circuitry is, by far, the inductance of
the ground system. And that's just where "ugly" construction shines --
it makes that inductance as small as possible.

Roy Lewallen, W7EL