Grundig AM/FM portable "Transistor 305" troubleshooting
I'm guessing that the 7.5V specs are for the lowest voltage the designers
felt gave acceptable performance.
Regardless, the important thing is the /relative/ voltages on a device's
terminals.
The base-emitter junction is forward-biased, about 0.3V for Ge devices, 0.6V
for Si. The base-collector junction is reverse-biased.
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