I simply can not understand how can npn output stage of an amplifier work without electrical conection (at least I`m not able to determine it using multimeter) from 1 (out of 4) transistor collectors to the rest of the circuit. But mesuring of the voltage (in working set up-sorce and loade on) show`s -45V on colector on that npn.
Marijan
Marijan
Ahh, now I see. It's very simple
Basically, the other three transistors are doing the work so the amplifier will appear to be fine until you stress it. You are seeing -45V on the one transistor that is unconnected simply because it's emitter is connected to the -ve rail and the device is turning on = low resistance.
Basically, the other three transistors are doing the work so the amplifier will appear to be fine until you stress it. You are seeing -45V on the one transistor that is unconnected simply because it's emitter is connected to the -ve rail and the device is turning on = low resistance.
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