This circuit was obtained from HAM Radio magazine in an 80's issue. The FETs are types of the time and the frequency is determined by the crystal. The circuit operates at voltages from 3 to 9 V.
This low noise preamplifier has a gain of 19 dB in the 30 MHz band. The circuit is from the 80s....
The shock is 2.5mH for frequencies between 3 and 30MHz. C is 1nF, R is 47k and the transistor can...
This traditional doubler configuration with the 555 can be found in other articles on the author’s site....