Quote:
Originally Posted by wd40addict
The concertina type phase splitter is operating its cathode at around 80v, giving plenty of headroom for swing, so it gets its DC bias straight from the previous stage.
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Yes...notice the cathode of the ECC82 is at 80V and the grid directly connected to the anode of the previous stage is at 75V making the grid of the ECC82 5V negative with respect to it's cathode.....As far as the valve is concerned it has a nice negative voltage on its grid irrespective of the fact that it's grid is 75V positive (with respect to chassis).