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Duncan, I'm a programmer with 40 years of experience in FORTRAN, C, C++ and Python. ?I've been been doing DSP lately but I've done some GUI development in the past. ?I'm generally known to be

Thank you so much! Pierre

I think PSUD assumes the full load is there at startup unless you set a delay. Normally, the cold valve does not conduct for a few seconds. The anode resistors are calculated for full voltage and

Hi Pierre, PSUD2 should be able to deal with this for you. If you measure the leg of the transformer at 70 ohms, simply add the required resistor value (100 ohms) to give your secondary of 170

Dear Members I am trying to design a PSU for a simple ECC88 line stage with a broken PSU. The original one has SS rectification but I'd like to rebuild it completely using EZ81 followed by CLCLC

Correction, the final paragraph should read as follows: Typically the bridge voltage is about 2x the full-wave voltage.

Can PSUD2 model the "dual voltage" circuit? This is where the topology looks like a bridge circuit with four diodes, but you also tap the circuit to get a second output as a full-wave

I have not touched a Mac in a decade. But a geek site reports that Mac is going to be less friendly toward un-signed apps: "... The right-click/control-click option for easily opening unsigned apps

Thanks for the guidance/idea. So the concepts is a dirty regulator circuit for the start up and a clean linear non-regulated for the in-use period. = sounds like a great idea :-) What I am unclear

I don't know what the powered circuit is, but all regulators are not created equal. They can have enormous phase & impedance non-linearities that really screw up the sonics. I can assure you that

Duncan, This is great! thanks so much I have only designed power supplies that are not regulated before :-) That approach makes life very simple! I can also add a capacitor after the Regulator,

Thanks Rich. For the load, is it a motor or something like that? Just trying to get my head round why the startup current is 10x the run current. Some feedback on the PSU, not trying to pick it

Duncan, Thanks for this; for some reason I had to really play with the circuit it get it to produce reasonable voltages in both scenarios. This is the regulator I was looking at

There's a couple of things I can think of. First is to ensure that the voltage feeding the regulator doesn't drop below the dropout voltage. You'd have to check the data sheet, but say the dropout

I have a design I want to explore to power a 5V device that consumes up to 3A on start up as the system boots up and consumes more power, and then settles and takes a steady state at 240mA How is

There's a guide in the help file which explains how to use the software and a video on how to make up your own custom rectifiers. Every on-topic question I get on here gets answered by me personally,

I found it intuitive and useful from the first click, but then I worked 45 years as an electrical engineer...? I think you need a bit more background first.? I'd suggest you Google "Vacuum tube

…and the question ‘where can [I] find a guide,’ or very similar, has been asked since at least 2006… except, all we get is avoidance and/or ‘nice’ obfuscations… Personally, I have come

Is there some reason you can't lower the input voltage. I built this two stage bucker to lower our 120v+ to ≈117 ieLogical BuckTrans

Topic locked, so I'll start a new one. A resistor inserted at the center tap of a full-wave rectifier acts the same as adding two resistors of the same value, one in series with each diode, and could