Re: Pale green compressor!
Posted: Sat Mar 24, 2012 3:13 am
BJF wrote:Hi,
Slight misscommunication here but yes if you have to you can run Bearfoot PGC at 18V by all means and it follows that same specifications as BJF PGC quite simply
Actually the datasheet for NE5534 states that it can be run from 6V's to 44V's in single supply.
I would also like to say that if 18V was the standard supply rather than 9V different design choices could be made.
What happens when you run PGC at 18V is simplified that influence of the compressor amplifier limitations will be lessened.
Other parts of circuit remain as far as possible the same at the expense of heat, while eventually the output voltage swing of the compressor amplifier will exceed the window in which the detector works.
There's also a limit to how wide the detection window can be without linearization of control elements rather than mere selecting, which however doesn't really matter for the circuit since the window is wide enough for the intended application.
Have fun
BJ
Am I damaging my PGC at 18 Volts? Would Bjorn have designed it differently if he made one strictly for 18 Volts?
Has anyone had a chance to compare a Bearfoot and BJFE?