R1 may be 10k and R2 100k. The transistor can be the BC548 and instead of the small lamp we can use a series LED with a 1k resistor. D1 is germanium and C1 is 10 nF. C2 can be 47 nF.
Author: Newton C. Braga Published:Aug, 2016 Formato:Book and e-Book Pages:...
This circuit is from a 1980s Signetics documentation. The circuit separates the modulation signal from a...
This old oscillator using germanium transistors has a high impedance headphone as inductor to...