This 1965 Philips circuit uses old company transistors like the BFY51 and BFY50. The circuit is powered by 12 V and the power gain is 8.9 dB.
This circuit generates signals from 50kHz to 10MHz, depending on the crystal used. The transistors can be...
The transistors in this circuit from a 1994 technical publication may be BC548 and the 12 V supply...
In the figure we have a simple logic level indicator for TTL circuits or powered by 5 V....