James E. LaBarre wrote:
Of course, this is assuming that the tradeoff in my time vs just buying
a new item is worth the cost.
The problem being there is there doesn't appear to be anyplace to buy
such parts locally anymore (Pok or Pawling areas).
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Mid-Hudson Valley Linux Users Group http://mhvlug.org
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Upcoming Meetings (6pm - 8pm) Vassar College
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Hi!
I was really not paying much attention as I saw this developing. If
you are working on stuff that runs at low frequency then it does not
make a lot of difference whether the PCB is enclosed or not and you can
use clip leads or what ever to supply power and make many test
connections. As you push the frequency up and get to either very low
signal levels or very high currents then things change rapidly. If you
are running an electric car controller at 16 kc and 600 amps then
inductance is a big problem. Likewise if you are working on a microwave
transceiver at 10GHz then everything enters the picture. You should look
at the notion of a field cell and realize that capacity is 8.85 x 1-^-12
farads per merer and that inductance is 4 pi x 10 ^-7 henries per meter.
This will get you to realize that impedances are a function of geometry
and frequency. That should make your technical life easier.
73 Burt N2YYU
_______________________________________________
Mid-Hudson Valley Linux Users Group http://mhvlug.org
http://mhvlug.org/cgi-bin/mailman/listinfo/mhvlug
Upcoming Meetings (6pm - 8pm) Vassar College
Apr 4 - An Intro to Chef
May 2 - May 2012 Meeting
Jun 6 - June 2012 Meeting
