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.
The circuit shown enables dynamic diode testing with an oscilloscope. We found this configuration in a...
This circuit is from an American 1964 documentation. Transistors of the time are used, but modern...
This circuit is from a 90's Radio Electronics. The circuit operates accurately up to about 15 kHz...