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In the Forum: Analog Playback
In the Thread: The last phonocorrector: “End of Life" Phonostage
Post Subject: Works +/- properlyPosted by Romy the Cat on: 8/3/2011
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 N-set wrote: |
| Sorry Romy, I did not want to sound nitpicking. I'm rather trying to understand if my copy works +/- properly. |
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I do not see you nitpicking, you do the right things and I wools do the very same if I was at your place. 1V at the 12AX7 bias is more or less where it has to be. My phonostage is an inspiration from Tim de Paravicini’s EAR but it was a few modifications made. The one that you are dealing is that I wanted the cathode of the second stage to sit on ground, aka Melquiades.
Anyow, it is not difficult to find out if your copy works +/- properly. If you have right plate voltage and the tube has the expected gain then the stage works fine. I do not remember now but I believe in closed loop the corrector shall give 55dB or something like this, it is not difficult to calculate. Did you use air caps or cheated and used mica?
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