TI-Sziklai Rangemaster Pair
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A "hybrid" NPN Germanium Rangemaster device built with a Fairchild "Dot" as Q1 and a Texas Instruments 2G30x as Q2. All pairs are audited and tested to bias to the GEO spec if wired as a Sziklai Darlington pair with the bias resistors we specify. More information on Germanium Darlington setups is in this article, and a complete project build is here.