identification of diode and monolithic amplifier

Thread Starter


Joined Nov 28, 2020
hi, I need to identify the components in the circuit. Its noise source, old and from china. In left corner it must be zener diode, next to it monolithic amplifiers. If you have experience with these, please let me know.thx 20201128_105804-min.jpg20201128_105956-min.jpg


Joined Jan 21, 2019
That’s really pretty, what question do you have about it exactly? Are you trying to reverse engineer it? You can take the melf diode and check it in reverse bias, I would also guess Zener as the noise source.
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