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You can purchase the official model (original creators of the model) at http://www.aeng.com/library.htm http://www.aeng.com/library.htm

You need to be careful about equating a JFET and a vacuum tube directly. Yes, they are very similar, but there are some very important physical differences. Because the frequency changes for one

In message <l9afub+10tlbe4@...>, dated Mon, 23 Dec 2013, sawreyrw@... writes: The OP asked how to do it in real life, and that is what I posted. -- OOO - Own Opinions Only. With best

In message <CANnsUMHruA-cbtCW3yswZaaKDayat7KKSm1wdPE3YZpvtmrAww@...>, dated Mon, 23 Dec 2013, Chris Maness <chris@...> writes: One way to tell is to analyse the circuit in

John, The 2 wattmeter method will work, but to avoid building a model of the wattmeters, it would easier to simply use the LTspice power plotting feature. You can easily get a numerical display of the

Jim, The standard LTspice JFET model includes 2 nonlinear caps. Rick

So would the change in gain due the change in B+ be the most likely cause of f_o change for a Clapp oscillator with a valve state amplifier? The reason for the inquiry is at this point mostly

In message <CANnsUMFiEqEOs9Si0pke8F-9R34KDT+DGL8kOgkA3oN15_WQ-g@...>, dated Mon, 23 Dec 2013, Chris Maness <chris@...> writes: Miller effect is feedback via the anode-to-control

In this case, "Miller Effect" capacitance is just the gate-drain capacitance multiplied by the stage gain. Miller capacitance won't change unless one or the other (gain, or Cdg) changes. Cdg WILL

The frequency does change in real life. I am working with the design limits of late 1950's technology. The radio in question uses an OA2 for a shunt regulator. I thought of replacing it with a high

In message <CANnsUMFQLY+eCBVz8ow+K+HLOREL12FBwcBXhgVO-DuQqOAfzQ@...>, dated Mon, 23 Dec 2013, Chris Maness <chris@...> writes: It ought not to in real life, of course. If it

Thanks, Tony. I actually got the Clapp oscillator working with a JFET substituted as a the vacuum tube. I didn't really even need to change the schematic. I just lowered B+ from 150V to 12V. Obviously

Hello Chris, I don't know what you expect to learn from substituting a JFET for the tube, but why not try with an actual tube model? You can find symbols for triodes, tetrodes and pentodes in the

In message <1387825178.9799.YahooMailNeo@...>, dated Mon, 23 Dec 2013, kim nielsen <dkkiboni@...> writes: 4 mm x 9 mm, about USD0.25 50-off. Those are checked for

Hi John Maybe a resistor across etch diode, but I think it is not necessary, the leakage current is big enough to balance the voltage across the diodes. Have used about 100,000 diode without resistor

In message <DUB110-W214CEC96F96D0814B332F3ACC10@...>, dated Mon, 23 Dec 2013, Michael Peter <michael883575@...> writes: In real life, use two wattmeters. Call the phases A, B and C. One

Measuring 3-Phase power is exactly the same as measuring single-phase power, except you have to do it 3 times. In practice you need a measurement set-up that monitors the vectorial product of voltage

While following this thread, it just dawned on me that I do not know how to measure 3 phase power. Any suggestions how to do this in real life and ofcourse in LTspice as well. Michael To:

Hello John I wish the wealth of information that can be found over the Internet could let me know about the exact nature of the problem LTspice shows for this particular schematic. Thinking of sparing

Hi, Does anyone have a UC1845A SPICE model they can share? Ken