February 2016
Intermediate to advanced
216 pages
14h 38m
English
Content preview from Newnes Audio and Hi-Fi Engineer's Pocket Book, 3rd Edition
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186
Phase-splitter A transformer with a split secondary winding
is one type of phase-splitter, but as transformers introduce
distortion, a superior method is to use a triode with equal
cathode and anode loads. The signal at the unbypassed cathode
of a valve is in opposite phase to that at the anode, and is equal
to it providing the loads are equal. Anode and cathode are
coupled via capacitors to the grids of the push-pull drivers.
The cathode is thus at about half the supply potential and
the grid must be just a few volts below it. This enables a direct
coupling to be made to the anode of the preceding stage. Both
phase-splitter and preamplifie ...
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