Some comments on the grounding thing. Ed, k4sb, sugested using
battery cable from an auto parts store and soldering connectors on the
ends. However, I have been tought that nothing in a ground path
should be soldered - everything should be clamped only. The reason is
that a soldered connection might heat to the point of melting and
separating the connection if it is required to cary a large amount of
current. This then causes that joint to have a relativly high
impedance, causing the current to seek a different path - one you
might want it to take.
This is just my two cent worth.
Cheers - Chuck de NJ6D.
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