I found three pcb like these today in a second hand shop:
It writes "no feedback non inverting i/v" on it, symmetrical supply, power ground signal ground and 4 parallel pnp/npn transistors in the input can be identified, but other than that I'd need some help to figure out the original circuit's schematic.I might use it for an MCcart phono preamp adapter, but I hope to identify the original circuit if anyone can help me to.
It writes "no feedback non inverting i/v" on it, symmetrical supply, power ground signal ground and 4 parallel pnp/npn transistors in the input can be identified, but other than that I'd need some help to figure out the original circuit's schematic.I might use it for an MCcart phono preamp adapter, but I hope to identify the original circuit if anyone can help me to.
Attachments
No feedback and non-inverting, make it a grounded base I/V. As for translating the PCB layout in to it's circuit, you're going to have to take the time to trace each connection on the board and translate that to a schematic. While a bit tedious, this is achievable with a little care and patience.
I usually do it myself , but I wanted to see if anyone knows the circuit already.Might be smth well known by someone willing to let me work less 🙂
I forgot to mention that, of course, tracing the PCM layout still won't identify individual parts types (resistor, capacitor, etc.), or their values.