New simplistic Salas shunt regulator V1.2R
Hey, I finished the first reg V1.2R, a photo just for fun
Hey, I finished the first reg V1.2R, a photo just for fun
An externally hosted image should be here but it was not working when we last tested it.
Salas,
Built the V1.2R, but can't seem to get the negative side up and running. The diode is quite dim. 69v in 4.1 vout. I've attached my schematic with measured voltages. I've already replaced the diode and Q9, double checked solder joints and resistor values. Your thoughts?
Thanks
Ken
Built the V1.2R, but can't seem to get the negative side up and running. The diode is quite dim. 69v in 4.1 vout. I've attached my schematic with measured voltages. I've already replaced the diode and Q9, double checked solder joints and resistor values. Your thoughts?
Thanks
Ken
Attachments
Salas,
Built the V1.2R, but can't seem to get the negative side up and running. The diode is quite dim. 69v in 4.1 vout. I've attached my schematic with measured voltages. I've already replaced the diode and Q9, double checked solder joints and resistor values. Your thoughts?
Thanks
Ken
The LED is dim since there is little Vo that is fed from. Make that BC546 a BC550C. 4.1Vout means just Vgs. There is no Vref functioning. See about Q3, Q6 correct practical orientation or being busted. Check correct JFET connections. Check its alive. I don't see that circuit part in your pic clip.
You miss a connecting line between S & G of Q5. If you miss it for real, you got no Vref.
Thanks you Salas!
Did you make new R PCBs or modded the 1.2? Also is the positive side steady and oscillation free? Any pic to see the layout?
Yes, I made new R PCBs, the positive side is steady though haven't checked for oscillations yet. Photos coming soon.
Nice. Check it all works steady and giving straight scope lines. Will be happy to know it all went OK since you use strong voltages and non used before Mosfets and layouts. Enough differences right from the start. If it will be success without many changes for both +/- regs, it will mean 1.2R is very elastic.
Any pic to see the layout?
A few pics, not the best lighting...
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