mark writes in response to thread:
>The danger of the two circuits meeting (improperly) is no greater thanthe
danger of a short >circuit in a standard setup. Why so worried??
A normal short circuit in the radio system would only happen if the _radio
hot lead_ touched ground. With the radio on a different circuit and a
different _reference to ground_ because of the second battery installed,
_any_ part of the new circuit met any differing voltage. For example, some
radios carry chassis ground at the speakers, all do at the antenna. There is
simply more places and opportunities for a problem to happen, as in _every_
piece of hardware and wire involved in the second system, and if it does,
you have the potential of melting more wires, the radio, or even exploding
either of your batteries.
You comment about originality not being maintained if you go to neg.
ground....Well, first, you are putting in a non-original radio, and then
proposing putting in a whole second battery and wiring circuit....so that
raises the question...which has more impact on originality, an invisible
wire-switching job and a little soldering inside the tach, or adding wires,
batteries and hardware???
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