To me it is amazing the agreement of LT Spice nominal bias prediction vs. actual measurements (i.e. I have found less than about 5% discrepancies w.r.t. sim world).
For burn in I am just using my cell phone (and no feedback, as I planned 6 dB of GNFB but, right now, I do not feel compelled to try).
There in no hum at all and even by switching on and off neon lamps in the room there is any click coming from the speakers.
This is my first time that I do not use any pot for bias adjustment: the fixed bias comes directly from the filtered dual output of the auxiliary small toroid and series PP topology of the output stage does the rest.
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Topic - Initial burn-in.... - 6AS7_6SN7 03:24:48 02/10/16 (3)
- RE: Initial burn-in.... - 91derlust 04:04:39 02/10/16 (1)
- RE: Initial burn-in.... - 6AS7_6SN7 05:48:23 02/10/16 (0)
- RE: Initial burn-in.... - vinnie2 03:27:37 02/10/16 (0)