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Date
Re: Graph Color
Hello Sven, 1. Attach a cursor to e.g. V(out). 2. Use the up/down arrow key of he keyboard to jump to the waveform you are interested. 3. Move the mouse cursor near the waveform-crosshair. The mouse
By Helmut Sennewald · #72660 ·
Simulating LM 6172
I am new to LT spice. I want to use the component LM 6172 in my schematic, I have downloaded the include file from the the path and used a generic opamp2.asy. However, the attributed is same as
By Aditi Jain · #72661 ·
Graph Color
Hi there, I am new here and have a newbie question. The .ac analysis of my tube schematic shows 27 graphs as I run 3 potentiometer with a step directive: .step param a list .1 .5 .99 .step param b
By Sven Bode · #72659 ·
Re: Pull-Push transformer for valve amp in LTspice
No, it wasn't about basic usage such as this, I think it was about analogspiceman's "xfrmr" library, two primaries for a push-pull or similar, some year or two ago. I tried to search the archives but
By Vlad · #72658 ·
Re: Pull-Push transformer for valve amp in LTspice
"... I really can't escape the feeling there was a topic somewhere about some impossibility of having two primaries in a transformer. " There may be special cases. Other than that, though, coupled
By Andy I · #72657 ·
Re: Pull-Push transformer for valve amp in LTspice
In message <537CC53F.1010307@...>, dated Wed, 21 May 2014, "Jerry Lee Marcel jerryleemarcel@... [LTspice]" <LTspice@...> writes: The model works as you say, but the total inductance
By John Woodgate <jmw@...> · #72656 ·
Re: Pull-Push transformer for valve amp in LTspice
Out of morbid curiosity, I opened the "transPPb.INC" model file, and noticed a gross error. The description says total primary L=100 and the individual inductances of both half-primaries is spec'd at
By Jerry Lee Marcel · #72655 ·
Re: Pull-Push transformer for valve amp in LTspice
In message <CALFKJk5yokRyVCrWd5VAgEppt-AGJ7Wy6+mx5utH+s0T8JX7_A@...>, dated Wed, 21 May 2014, "Vlad imbvlad@... [LTspice]" <LTspice@...> writes: It's not only you, by any
By John Woodgate <jmw@...> · #72654 ·
Re: Pull-Push transformer for valve amp in LTspice
Guilty, what can I say, but I really can't escape the feeling there was a topic somewhere about some impossibility of having two primaries in a transformer. Maybe there are some crossed neurons
By Vlad · #72653 ·
Re: Pull-Push transformer for valve amp in LTspice
In message <lli8ok+1jht4cj@...>, dated Wed, 21 May 2014, "pha0001@... [LTspice]" <LTspice@...> writes: Rather than point you to things to copy, I'll show you how to
By John Woodgate <jmw@...> · #72652 ·
Re: Pull-Push transformer for valve amp in LTspice
I believe you see why I prefer the multiple winding solution. Having to open the model with a text editor and reloading it in the .asc file is not my idea of immediacy.
By Jerry Lee Marcel · #72651 ·
Re: Pull-Push transformer for valve amp in LTspice
The problem with multiple primaries is that it may create conflictss if two sources are too strongly coupled. Indeed, when using multiple primaries, one must make sure the voltages, phases and source
By Jerry Lee Marcel · #72650 ·
Re: Reference Information
I'll add another vote. I've used LT Spice daily for many years now... The book is excellent even for people reasonably skilled in the art. The sections dealing with magnetics simulations are
By Harry Richman · #72649 ·
Re: Pull-Push transformer for valve amp in LTspice
in the Fender schemo. Using the "Fender Twin Reverb" example, the output transformer is modeled in the model file "transPPb.INC". Any text editor should do. I also see extra nodes/elements for
By Vlad · #72648 ·
Re: Pull-Push transformer for valve amp in LTspice
Well, I just tried it and you're right, it does work, but I know there was a discussion some time ago (years, probably) about not being able to make a more than one primary transformer in LTspice.
By Vlad · #72647 ·
Re: Pull-Push transformer for valve amp in LTspice
In fact all these examples use a sub-circuit instead of coupled inductors, but I know that coupled inductors work and are IMO easier to edit. To my great shame I must admit I haven't been able to edit
By Jerry Lee Marcel · #72646 ·
Re: Pull-Push transformer for valve amp in LTspice
Indeed a dual primary xfmr can be created in LTspice. You need to include all windings in the K statement. There is a beautiful example of tube amp in the Files, in fact more than one: Fender Twin
By Jerry Lee Marcel · #72645 ·
Re: Pull-Push transformer for valve amp in LTspice
I don't know if it's possible to simulate a double-primary transformer in LTspice. At least not with inductors and coupling between them. Still, if others have different answers, it would be useful to
By Vlad · #72644 ·
Pull-Push transformer for valve amp in LTspice
I am having trouble modelling an ideal Pull-Push center tap 8 ohms transformer with a 6.7k primary anode-anode impedance in LTspice. Formula: 8*(Np/Ns)^2=7.6k Thus, Np/Ns=30.82/1 Here are my LTspice
By tom tim · #72643 ·
Re: Regarding LT1521-5
In message <F95E7D51-CF12-459A-9C1E-8E9BFD35813C@...>, dated Wed, 21 May 2014, "Mark Gurries gurriesm@... [LTspice]" <LTspice@...> writes: I suspect that Kumar is from a
By John Woodgate <jmw@...> · #72642 ·