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I do not understand how to change the default bridge rectifier to a
full wave. Trying to get my first PSU designed

Roger

If you right-click on the rectifer area when it is lit up, it should allow you some different choices.

Regards,
Duncan

Any possibility of having you add a GBL06 and GBU806 rectifiers to the list? I really don't understand how to find the "vlaw / vfac / and dres" fields.?

There's some resources which should help with this. You will need a data sheet (that's a must) but once you have this, the process is quite simple; there's a YouTube video which describes the process in some detail and some spreadsheets in the files area which help.

The YouTube video is at ->?

There's a couple of spreadsheet files here in groups.io that help with solid state and vacuum tube rectifier modelling ->?/g/duncanampspsud/files/documentation

Hope this helps.

Regards,
Duncan

Thanks! I'll check that out.
One more question, the capacitors have a resistance field. The start up schematic has 2 ohms here. Shouldn't this be in the megaohms for a cap? I don't understand where this measurment is derived from.

This is for series resistance. All capacitors have this, and it contributes to reducing the current that can flow in and out of a capacitor and therefore its effectiveness.

It's a necessity to make the simulation work, and manufacturers of capacitors (decent ones, anyway) will publish figures for the series resistance. Sometimes it's displayed on the data sheet as ESR (Effective Series Resistance), hope this helps.

Regards,
Duncan

Forgot I can measure ESR, the ESR readings are at 120, 1K, and 10KHz, should use the lowest resistance?

On 8/12/2023 6:54 PM, Eric W via groups.io wrote:

capacitors have a resistance field. The start up schematic has 2 ohms

This of this as "lead resistance".

Actually in electrolytics it is more like "paste resistance", the semi-damp electrolyte between the electrodes. In foil caps, foil resistance too.

If this series resistance could be ZERO, then INFINITE current could flow for an instant, and blow-up other parts. And blow-up the mathematics, which does not have infinite fingers to count on. Fortunately ZERO resistance doesn't happen in our everyday world.

120, 1K, and 10KHz, should use the lowest resistance? ie 120Hz?

Use the number for (nearest) YOUR power frequency. In 60Hz lands with full wave rectifier, the 120Hz number is perfect. Probably close-enough for 50Hz power or half-wave rects (DCR changes little with frequency). If on the other hand you are messing with power vibrators (1940s car radio) or switching supplies, you are filtering for 400Hz to 40kHz and should use the high-frequency numbers.

Shouldn't this be in the megaohms for a cap?

That's shunt (parallel) resistance. Yes, much higher than your load. May be "only" hundreds of Kohms for a high-uFd electrolytic, even less first thing after long storage; but the cap makers know it must be "negligible" compared to load or you will complain about waste power and heat. (Hasn't been a problem in almost 100 years?)