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Hello Group! Through trial and error I have discovered the directory structure required to make customize libraries work seamlessly with LTspice24: Step 1. First click on "tools", "settings", "Search

Hi Andy, I am sorry, I got around the issue and completely forgot about sending this until I wanted to look up something else in the IO Group today.? The way that I got around it was to just sim with

I think you misunderstood that somewhat. *.TRAN 60 UIC* means "Skip initial operating point solution". *.TRAN 60 Startup* means "Start external DC supply voltages at 0V". Do not confuse these two.?

Also missing the symbol for PZ200_Voltage_Sense. If it's missing the symbol, chances are it is missing the model or schematic for that part too. Your .zip file has three schematics in it.? Is there

Hello I am using python to run LTSpice simulations on a server (not currently using PyLTSpice). I am leveraging the cli to kick off asynchronous background tasks of LTSpice. The line of code looks

Great point ! Let me check whether my understanding is correct. ITS step of .TRAN analysis without UIC works out the initial DC operating

You haven't included the LMV324 symbol and model. They don't come with LTspice as far as I can see. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Trying to create a model from my 3 phase voltage sense circuit and having issues with the model.? Placed a zip file (3Phase_Voltage_Sense.zip) in the Temp directory which contains all the files along

I'v enever seen a warning not to power only one half of the filament, and there are many examples of this arrangement that work flawlessly.

Probably, but the precise value doesn't matter here. The point was to hit the heater model with an AC voltage source. This works better of course because the initial voltage (for the DC operating

Yee, that would explain, but the resistance/temperature law for pure(sh) metals is a quadratic function, which does not blow up.

I wrote: Oops, typo!? That should be: " *fit* the formulas".

A good question. This model can fail because it has more than one stable operating point.? Think about flip-flops.? They have two stable states, and neither is guaranteed to happen initially.? A

I wrote: This is just a quick guess about what might be happening in this 12AU7 heater SPICE model.? I did not attempt to verify this, so do not accept that this is what happened. I think it's

I suspect that the manufacturer wouldn't recommend powering just one half of the double-triode in case that poisoned the cathode of the other half, making it unusable elsewhere. -- This email has been

It is one of Duncan's collection of tube models.? ?duncanamps.com Andy

Adding 0 V voltage sources lets you use that current to control other devices (e.g., F or H elements, B sources). The Alt+Left Click feature is nothing more than a shortcut to adding up those device

I almost always avoid using UIC, but this 12AU7 model recommends it, so I tried it.? I think a better approach might be to use the STARTUP qualifier, which also starts with everything set to 0 and

I have only seen split heaters wired either in series or in parallel.? I don't think I ever saw the two halves powered separately before. But it has been so long since I worked much with

4.2 V peak is 3 V RMS, not 6. Did you write those numbers backwards?? Did you mean 6 V peak, 4.2 V RMS? Andy