If staying on subject, I estimate V1 Rp about 8k, V2 Rp about 2k, V3 Rp about 0.8k. (I'd like to know more exacting numbers, those are my guesses based on datasheets and operating points). We can calculate all the Xc's and Xl's. I mentioned the Tx's DCR's. Where can we find the phase shift resulting in instability right around 2Hz?
(Considering the above suggestions, I'm imagining my next 'try' might be a dedicated supply [for V1] much higher in output voltage, and RC coupling V1 to V2.) (but I'm still not thrilled with all the gain I have) (((this is my approach to the hobby. think, and try)))
(Considering the above suggestions, I'm imagining my next 'try' might be a dedicated supply [for V1] much higher in output voltage, and RC coupling V1 to V2.) (but I'm still not thrilled with all the gain I have) (((this is my approach to the hobby. think, and try)))
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