So I replaced q4 and q3 the 840. Retested q3 the 840 and still no vg's? I am looking for dc volts right? I know it's a dumb question just want to make sure.
Look if you got any structural damage also, like a broken via or an intermittent sense/force connection/wire, broken isolation etc.
Thanks good to know. This is the same w/ dummy load or my circuit attached?
Dummy load or real load it owes to show Vgs (gate source characteristic like Vbe in BJTs). In what conditions it stopped working as it should?
It was in the my circuit. I found after that I had swapped the 1.8 ohm r6 with the 1.8k r8.
So I changed out q1, q2 and q3, q4,5,6 also the zeners I still have the same results. I can set the mV's but no voltage traveling all the way thru. I have 330vdc should see 310vdc coming out. Oh, currently it seems to pull my power supply down to 285vdc
So I changed out q1, q2 and q3, q4,5,6 also the zeners I still have the same results. I can set the mV's but no voltage traveling all the way thru. I have 330vdc should see 310vdc coming out. Oh, currently it seems to pull my power supply down to 285vdc
Salas,
I think your builders would benefit from an instruction set showing how to build and test the HV in easy stages.
LV AC into the CCS stage with a simple shorted output and no components stuffed for the regulator part.
The builder can then experiment with the current setting resistor and prove that the CCS is working properly.
Then add on the regulator components, but with a LOW VOLTAGE setting resistor/reference tacked on so that it is easy to replace with the final value. Test the CCS+REG using LV AC.
Finally go to HV AC and final Voltage Setting Reference and test with an HV dummy load.
I think your builders would benefit from an instruction set showing how to build and test the HV in easy stages.
LV AC into the CCS stage with a simple shorted output and no components stuffed for the regulator part.
The builder can then experiment with the current setting resistor and prove that the CCS is working properly.
Then add on the regulator components, but with a LOW VOLTAGE setting resistor/reference tacked on so that it is easy to replace with the final value. Test the CCS+REG using LV AC.
Finally go to HV AC and final Voltage Setting Reference and test with an HV dummy load.
That would be alright for understanding the circuit, put it to pace without HV hazards, experimenting etc. This one we try find why there is no VGS on the output Mosfet was a a working one that failed or one that never worked though I am not sure yet. Visually is OK for components stuffing.
I think your talking about the current trimmer here. How about the voltage trimmer, is it working?
When I happend to short the CSS sink with Vin the IRF, 2SK117 and D1 putted their ski's in the weather.
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