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RV: PSUDII giving enough power but real world not!!!

felipe cerrillo vindel All Messages By This Member #383 开云体育 Hi Duncan, Tried without the choke with success. Regards Felipe De: felipe cerrillo vindel <fcv@...> Enviado: lunes, 17 de febrero de 2025 12:28 Para: [email protected] <[email protected]> Asunto: PSUDII giving enough power but real world not!!! ? Hi Duncan, Attached simulations with PSUDII of the PSU not giving enough power? but real world not enough power, any idea why? Thanks & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro <duncan@...> Enviado: sábado, 12 de febrero de 2022 22:47 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] Rectifiers.txt ? Hi Felipe, This is the old version so the previous advice will not help you. Could you please email your rectifiers.txt file to me at postmaster@... and I will take a look at it for you, thanks. Regards, Duncan ?
Duncan Munro All Messages By This Member #385 Hi Felipe, ? I ran this circuit with the choke through LTSpice and it gives 323.2 Volts, quite close to the results you are getting from PSUD. ? PSUD might be getting confused by the very low value or R on the final RC filter (0.75 ohms) but other than that, the results look OK. ? When you say not enough power, what are you seeing from your real world circuit? ? Regards, Duncan ?
felipe cerrillo vindel All Messages By This Member #386 开云体育 Hi Duncan, Yes not enough power for my real world circuit, when I use CCS as anode load maximum can get is 26mA so 13mA per channel in place of 30mA per channel. Thanks & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via groups.io <duncan@...> Enviado: lunes, 17 de febrero de 2025 14:15 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I ran this circuit with the choke through LTSpice and it gives 323.2 Volts, quite close to the results you are getting from PSUD. ? PSUD might be getting confused by the very low value or R on the final RC filter (0.75 ohms) but other than that, the results look OK. ? When you say not enough power, what are you seeing from your real world circuit? ? Regards, Duncan ?
Duncan Munro All Messages By This Member #387 Hi Felipe, Thanks for the feedback. My suggestion would be to measure the voltage before the choke and after the choke, please do these for both on load and off load it might point to what is going wrong. Regards, Duncan toggle quoted message Show quoted text On Mon, 17 Feb 2025 at 13:31, felipe cerrillo vindel via <fcv=[email protected]> wrote: Hi Duncan, Yes not enough power for my real world circuit, when I use CCS as anode load maximum can get is 26mA so 13mA per channel in place of 30mA per channel. Thanks & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via <duncan=[email protected]> Enviado: lunes, 17 de febrero de 2025 14:15 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I ran this circuit with the choke through LTSpice and it gives 323.2 Volts, quite close to the results you are getting from PSUD. ? PSUD might be getting confused by the very low value or R on the final RC filter (0.75 ohms) but other than that, the results look OK. ? When you say not enough power, what are you seeing from your real world circuit? ? Regards, Duncan ? -- Duncan Munro
felipe cerrillo vindel All Messages By This Member #388 开云体育 Hi Duncan, Isn't the choke because connected without the choke & problem remains. Thanks for help & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via groups.io <duncan@...> Enviado: lunes, 17 de febrero de 2025 14:46 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, Thanks for the feedback. My suggestion would be to measure the voltage before the choke and after the choke, please do these for both on load and off load it might point to what is going wrong. Regards, Duncan On Mon, 17 Feb 2025 at 13:31, felipe cerrillo vindel via <fcv=[email protected]> wrote: Hi Duncan, Yes not enough power for my real world circuit, when I use CCS as anode load maximum can get is 26mA so 13mA per channel in place of 30mA per channel. Thanks & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via <duncan=[email protected]> Enviado: lunes, 17 de febrero de 2025 14:15 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I ran this circuit with the choke through LTSpice and it gives 323.2 Volts, quite close to the results you are getting from PSUD. ? PSUD might be getting confused by the very low value or R on the final RC filter (0.75 ohms) but other than that, the results look OK. ? When you say not enough power, what are you seeing from your real world circuit? ? Regards, Duncan ? -- Duncan Munro
felipe cerrillo vindel All Messages By This Member #389 开云体育 Hi Duncan, Attached power transformer specs. Regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via groups.io <duncan@...> Enviado: lunes, 17 de febrero de 2025 14:46 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, Thanks for the feedback. My suggestion would be to measure the voltage before the choke and after the choke, please do these for both on load and off load it might point to what is going wrong. Regards, Duncan On Mon, 17 Feb 2025 at 13:31, felipe cerrillo vindel via <fcv=[email protected]> wrote: Hi Duncan, Yes not enough power for my real world circuit, when I use CCS as anode load maximum can get is 26mA so 13mA per channel in place of 30mA per channel. Thanks & regards Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via <duncan=[email protected]> Enviado: lunes, 17 de febrero de 2025 14:15 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I ran this circuit with the choke through LTSpice and it gives 323.2 Volts, quite close to the results you are getting from PSUD. ? PSUD might be getting confused by the very low value or R on the final RC filter (0.75 ohms) but other than that, the results look OK. ? When you say not enough power, what are you seeing from your real world circuit? ? Regards, Duncan ? -- Duncan Munro Cerillo Felipe TA CF125 scheda cliente (2019_07_02 11_22_03 UTC).pdf Cerillo Felipe TA CF125 scheda cliente (2019_07_02 11_22_03 UTC).pdf
Duncan Munro All Messages By This Member #390 Hi Felipe, ? I'm unsure of what further help I can offer; PSUD seems to give the right numbers against LTSpice, so based on the information you have provided, the supply should give 60mA at 323 Volts or so.? All I can suggest is checking each component in turn to check for failure as part of the fault finding routine. ? Start at the beginning, test the transformer off load then with a light bulb attached - check the AC voltages in both cases. Check that the rectifiers are giving a reading in one direction on an ohmmeter, but not in the other. Check the capacitors with an ohm meter for shorts (sometimes the dielectric can puncture). ? Regards, Duncan ?
felipe cerrillo vindel All Messages By This Member #395 开云体育 Hi Duncan, Thank you, could adding more capacitance to the PSU be the solution? Bst rgds Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via groups.io <duncan@...> Enviado: lunes, 17 de febrero de 2025 19:06 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I'm unsure of what further help I can offer; PSUD seems to give the right numbers against LTSpice, so based on the information you have provided, the supply should give 60mA at 323 Volts or so.? All I can suggest is checking each component in turn to check for failure as part of the fault finding routine. ? Start at the beginning, test the transformer off load then with a light bulb attached - check the AC voltages in both cases. Check that the rectifiers are giving a reading in one direction on an ohmmeter, but not in the other. Check the capacitors with an ohm meter for shorts (sometimes the dielectric can puncture). ? Regards, Duncan ?
felipe cerrillo vindel All Messages By This Member #396 开云体育 Hi Duncan, I'm using a bleeder resistor of 100K to discharge the capacitors of the raw PSU, could be a problem? Bst rgds Felipe De: [email protected] <[email protected]> en nombre de felipe cerrillo vindel via groups.io <fcv@...> Enviado: miércoles, 26 de febrero de 2025 15:03 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Duncan, Thank you, could adding more capacitance to the PSU be the solution? Bst rgds Felipe De: [email protected] <[email protected]> en nombre de Duncan Munro via groups.io <duncan@...> Enviado: lunes, 17 de febrero de 2025 19:06 Para: [email protected] <[email protected]> Asunto: Re: [duncanampspsud] RV: PSUDII giving enough power but real world not!!! ? Hi Felipe, ? I'm unsure of what further help I can offer; PSUD seems to give the right numbers against LTSpice, so based on the information you have provided, the supply should give 60mA at 323 Volts or so.? All I can suggest is checking each component in turn to check for failure as part of the fault finding routine. ? Start at the beginning, test the transformer off load then with a light bulb attached - check the AC voltages in both cases. Check that the rectifiers are giving a reading in one direction on an ohmmeter, but not in the other. Check the capacitors with an ohm meter for shorts (sometimes the dielectric can puncture). ? Regards, Duncan ?
Duncan Munro All Messages By This Member #397 Hi Felipe, ? "Thank you, could adding more capacitance to the PSU be the solution?" "I'm using a bleeder resistor of 100K to discharge the capacitors of the raw PSU, could be a problem?" ? I've already offered some advice on troubleshooting to take this forward. No disrespect, but I'm not looking to type the same reply out again. ? As this is clearly not a PSUD2 related issue, I'm closing the topic. ? Regards, Duncan ?

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