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/diy/ - Do It Yourself

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>> No.2519724 [View]
File: 213 KB, 2054x2319, suiful.png [View same] [iqdb] [saucenao] [google]
2519724

this shit is starting to make me suicidal
After the mic preamp not working properly due to shitty fake chink instru. amplifier, i made a brand new pcb and this time used locally sourced high quality standalone grass fed opamps to make my own instrument amplifier, seen in the bottom of the pic
But it is still not fucking working.
I checked all the wires and they seem fine.
I even built the whole circuit in falstad and it works flawlessly there:
I have the audio output hooked up to a scope and i am getting nothing basically. A flat line (with a bunch of noise of course but that is fine since there is no shielding yet). Only if i blow into the mic hard i get slight wobble in the output voltage.
The capsule is electret (https://micbooster.com/jli-microphones/262-jli2555.html)) i am using the tranny they recommended. (2N4416) I measured the legs and they are correctly getting about 13V and -13V supplied to them, from my preamp circuit
The only chink part left is the 2N4416 attached to the capsule, so i could try to change that as well (i have some J111 njfets on hand), but i doubt that is the culprit

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