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In Reply to: RE: My mistake posted by Jeff Davison on May 31, 2012 at 09:20:39:
"Some on the aforementioned thread have opted for a single shunt regulator that accomplishes control of both current and voltage."The regulated supply that I showed regulates the total current draw from the supply but it does not make the amplifier stage constant current.
If your output transformer has high enough inductance and low enough shunt capacitance and if it's secondary is not loaded down then your amplifier stage will be constant current without the use of a CCS.
It's really all about load lines. If the load line is horizontal enough then the stage is said to be constant current even though nothing is totally constant current.
The idle current of the 26 is set by it's bias voltage (cathode resistor value).
If the OPT represents a high enough impedance the current through the 26 will not change much at all as you modulate the it.
In other words, the OPT IS the CCS.
Tre'
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Edits: 05/31/12
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- RE: My mistake - Tre' 10:39:24 05/31/12 (0)
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