I have a very small radiation detector that outputs signal of small amplitude. Requires preamplification before going to an actual amplifier. When constructing the system prior to the preamp, would I like to have higher resistance or lower resistance? I know ohms law, and smaller wires have higher resistance thus greater induced voltage from the sensor. The key factor for me is signal to noise ratio.
So in summary small vs. large wires and any other recommendations to keep in mind?