[Elecraft] Manhattan-style pad capacitance

[Jack Smith]

The link I posted has a direct jump to bookmark and might cause some 
browsers a problem.  The main prototyping page is at
http://www.cliftonlaboratories.com/Prototyping.htm and might be a better 
starting point.

Jack K8ZOA


Jack Smith wrote:
> Geoff, GM4ESD, has asked the relevant question "how much shunt 
> capacitance is present in a PCB island" when cut with a core drill?
>
> I've tried to answer that question with a combination of theory and 
> measured data, which are in close agreement. The details are at 
> http://www.cliftonlaboratories.com/Prototyping.htm#Island_Pad_Prototyping. 
> You can read the entire page, or jump to the capacitance discussion 
> via the in-page link.
>
> The short answer to the questions is "some" and whether "some" is too 
> much depends on a variety of things discussed in the analysis. I will 
> say, however, that the data has caused me to reconsider using the very 
> thin 0.029" PCB stock for work at higher frequencies, as convenient as 
> it may be for cutting and hole punching.
>
> Jack K8ZOA
>
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