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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

Resistors have an arrow when you hover the mouse pointer over them.? It shows the reference direction. There is no question but the current was flowing backwards.? More embarrassingly, current was

Where did you get your tube subcircuit?? If you open your subcircuit in notepad, is it copyrighted by Ayumi?

And you can also probe a ground wire between some parts and a node 0 ground triangle. Probe the ground wire that connects one corner of a bridge rectifier (D10 & D11) to ground and it creates the plot

I'm pretty sure that he meant wiring or routing, like plumbing in a house. Plumbing generally has to have its installation pre-designed, or otherwise installed by a certain set of rules, much like

Indeed; it's not safe to report current direction through? a passive component. I think that the direction of current measured through a 'wire'? is always correct. To measure it may require

I haven't checked your schematic, but did you know that current through a 2 port device always flows into port 1 and out of port 2. The standard symbol has no visual indication which is port 1. Try

I mean Mathias, not Mattias, sorry.

You're right John, but the point the I was making was the vagaries of finding the frequency when something happened. I do tend to blunder my way through .meas syntax and get there in the end...

The two .MEAS expressions are not consistent. -- This email has been checked for viruses by AVG antivirus software. www.avg.com

Current version 24.1.3 is still plagued with a few .meas bugs. The upcoming release 24.1.4 will have all these resolved. Then, your two examples below will all work again. The documentation of .meas

I was looking at the slope of some filters and had been using the line below .meas ac V3dBf find FREQUENCY when mag(S21(V1))=Vmax/sqrt(2) I don't think it is documented but I think it worked in 24.1.2

It is converted to a B-source, but it's name doesn't change in the process. That's why it's still listed as an E-source. The expanded netlist is currently not suited for simulation. It's just a

Yes, I have, and the return of the expanded netlist is welcome. I was surprised to see the E-source with a value expression rendered that way instead of being converted to a B-source.

I think P = pin, given to device pins that have no wire attached. Significance?? None, really. Andy

I just learned something I'd never seen documented (but there's a lot Docs I haven't studied in detail!) I placed two V-sources in series, "close coupled", with their extended pins touching - no wire

Preamp tubes are very often heated at reduced voltage, for noise optimization. Particularly in condenser microphones, where secondary emission (grid current) is to be avoided at any cost. E seies

This is often the cause of filament failure. On the baby computer replica we run the heaters at around 3v for a short while before switching to 6.3v to limit the initial "shock". I can't remember the