This circuit was found on an 80's Ham Radio. The transistor admits equivalent. The circuit can generate 20 to 100 MHz signals operating at the fifth harmonic of the crystal.
This circuit appears in several configurations in this site. This is from American documentation from...
We found this circuit in a 90s Radio Electronics. The circuit generates frequency-modulated 220 kHz signals. The...
El circuito de la figura es un regulador de corriente con ajuste en el rango de 0 a 3 ampères. El...