ago \$egingroup\$ i guess the compound transistors (q +q and q +q ) are used because the driving signals are somewhat high impedance. the input impedance of darlington pair is nice and high. with ma flowing through q & q , you get a v drop across r , and a v drop across r . those two are big power resistors...
counter that i prefer the warm coloration that vacuum tubes provide. most of all, i know that i can repair the amp — regardless of what happens. the transformers are a bit scarce, but can be found on ebay and other online sources. otherwise, everything is ordinary electronics stock — capacitors, resistors...
applied on the utility distribution system or on a utility customer's low voltage bus, and is caused by a near-resonant condition between the switched capacitor bus and the capacitances at lower voltages. pre-insertion inductors are more effective than controlled-closing schemes and pre-insertion resistors...
converts to methylated mercury in sediments. the toxin can then accumulate in living organisms and travel up the food chain. mercury can adversely affect a baby's growing brain and nervous system. adults can suffer organ damage, mental impairment, and a variety of other symptoms. cadmium found in chip resistors...
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