General Radio 1644 A Megohm Bridge Demos
The General Radio 1644-A was introduced in July of 1964. It is a remarkable piece of engineering to this day. It is spec'd to measure from 1K ohm to 1000T (era) ohms! In Part I the bridge is used to compare two 200 M Ohm (200x10^6) resistors and demonstrate why one is superior to the other. In Part II a wafer switch that has 600 G ohms (600x10^9) of isolation is treated with DeoxIT and re-measured. Can you predict the result ?
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