Thank you for your help.
R103/203 now 4K7, can adjust Vout to as low as 24.5v. It’s set and stable at 30now
R101 18R7, Vdrop 3.1v (165mA)
Behold the precision 18R7 resistor! 🤣
R103/203 now 4K7, can adjust Vout to as low as 24.5v. It’s set and stable at 30now
R101 18R7, Vdrop 3.1v (165mA)
Behold the precision 18R7 resistor! 🤣
Salas I'm using a +- BiB regs. I usually with + reg ground the negative mains reservoir capacitor to chassis GND, the question is: could I do the same for the - reg so ground the positive mains reservoir capacitor to chassis GND, right?
TIA
Felipe
TIA
Felipe
Better at the main capacitors (- leg in positive section + leg in negative section).
When the main capacitors - leg in positive section is chassis grounded the two LEDs at the voltage reference doesn't lights up & Vout goes near 0V, when I disconnect the wire the positive reg works ok, any idea what's happening?
N.B. Negative reg is working ok with the main capacitors (+ leg in negative section) is connected to chassis GND.
N.B. Negative reg is working ok with the main capacitors (+ leg in negative section) is connected to chassis GND.
Maybe something with the load needing to float or the sense lines impedances. If it doesn't hum with one section only 0V referenced to chassis, don't modify the approach further.
Thanks Salas, I have both output RCAs GND also grounded to chassis: I left or have I to disconnect?
So your advice is only negative reg mains capacitor +leg grounded to chassis?
+-regs are powering Nelson Pass BA-3 +-25V
So your advice is only negative reg mains capacitor +leg grounded to chassis?
+-regs are powering Nelson Pass BA-3 +-25V
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OK thank you.
Last question: it's better 4 wire kelvin connection or 2 wires for BA-3?
N.B. Now it's connected 2 wires.
Last question: it's better 4 wire kelvin connection or 2 wires for BA-3?
N.B. Now it's connected 2 wires.
More or less 30 cm.
The regs. are connected for two wires downside the PCB because I use the four outputs to powering the separate +- supply that needs each channel. So will be too much complicated if I have to use the 4 wire Kelvin or using a very small wire 24 or 26AWG or less?
Best will be two power tx in place of one with 2 secondaries each power tx and four regs. so 2 positive and 2 negative to power each channel separately.
The regs. are connected for two wires downside the PCB because I use the four outputs to powering the separate +- supply that needs each channel. So will be too much complicated if I have to use the 4 wire Kelvin or using a very small wire 24 or 26AWG or less?
Best will be two power tx in place of one with 2 secondaries each power tx and four regs. so 2 positive and 2 negative to power each channel separately.
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Best use two thick wires because long Kelvin can attract interference.