This circuit was obtained from a 1980's QST magazine. The circuit can generate 1 to 15 MHz signals with 1 Vpp at 50 ohms load. Used transistors are still common today.
The Texas Instruments TPS7A92 integrated circuit consists of a low-voltage (LDO) linear voltage...
This circuit to increase the sensitivity of instruments to 100 uA (or close to it) was found in...
This voltage controlled oscillator uses a varicap to change the frequency. Usin a 100 turns coil...