Shhhh, don't tell anyone you're doing that. You will need to change the LM3xxx's so that there is at least 2.5V overhead.Voltage Change Question
If I change the voltage of power supply from 24V to 20V, do I need to change parameters in Pearl circuit? Because I use shunt regulator instead of linear regulator. Voltage drop of my shunt regulator is very high. This circuit cannot produce 24V.
The Belleson regulator doesn't win any prizes for noise. (See attached chart, noise should be V/RtHz) In fact, if you dig way back in this thread I measured the Pearl II noise with the conventional regulators and the Jung-Didden regulator and couldn't detect any difference.Has anyone replaced the 7824/7924 regulators with Belleson or Sparkos units?
I purchased the Belleson to compare "blindly" to the regulators in the Linear Audio article. The Sparkos weren't on the horizon at that time. If they send a pair, I can re-run all the tests (PSRR, Noise, and Output Impedance).
Populated the regulators and filter components. Voltages checked out. Started populating the rest of the resistor. Very nice boards by the way!Coming along nicely. Just finished the PSU as the PCB's and FET's arrived from Pass. Unfortunately I did not see the "ugly psu cabinet" competition before I had ordered a rather nice box for my PSU View attachment 1078594 View attachment 1078597 . Oh well, I guess i can hide it away anyway, and it's too small to stack components on anyway