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#41 |
diyAudio Member
Join Date: Jun 2014
Location: New Hamburg, Ontario
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[QUOTE=Mooly;4030525]
And just as in the first sims, hovering over circuit lines and nodes shows the DC conditions. We will elaborate on that and actually "click and attach" voltages to the diagram. I keep getting question marks instead of voltage values. Any idea what I'm doing wrong? |
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#42 | |
diyAudio Moderator
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[QUOTE=jwilhelm;4033016]
Quote:
Make sure you have the DC op pnt selected initially and then run the simulation. Does that work ![]()
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Installing and using LTspice IV. From beginner to advanced. |
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#43 |
diyAudio Member
Join Date: Jun 2014
Location: New Hamburg, Ontario
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[QUOTE=Mooly;4033034]No it doesn't. They remain question marks.
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#44 |
diyAudio Moderator
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Hmmm... well go through it from the start.
I'll have to just break off for a little while first though. Back later ![]() Try this though... attached is a basic file for the amp. Run it (close the first window of text that appears) and then left click say the collector twice and attach a voltage to the trace. If that's OK then close the file completely, reopen it (it should show a question mark) and then run it (should revert to the voltage again)
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Installing and using LTspice IV. From beginner to advanced. |
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#45 |
diyAudio Moderator
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When you close the file completely make sure to save the changes of course
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Installing and using LTspice IV. From beginner to advanced. |
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#46 | |
diyAudio Member
Join Date: Jun 2014
Location: New Hamburg, Ontario
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Quote:
Last edited by jwilhelm; 22nd August 2014 at 01:40 PM. |
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#47 |
diyAudio Moderator
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OK, I'll just talk you through what I am doing... you do exactly the same.
Attached to this post is another LT file devoid of all the commands. Its called Test Two. 1/ Download and open it. 2/ Right click the workspace and select <Edit Simulation> 3/ Select the DC op pnt tab and click OK. That lets you drop the .op command onto the diagram. 4/ Right click the workspace and select <run> 5/ Close the new window that opens. 6/ Move the cursor over the horizontal trace wire that goes to the base of the transistor. 7/ Left click it slowly twice and you should be able to attach a voltage. Do you get that far ?
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Installing and using LTspice IV. From beginner to advanced. |
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#48 |
diyAudio Moderator
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It should look like this.
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Installing and using LTspice IV. From beginner to advanced. |
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#49 |
diyAudio Member
Join Date: Jun 2014
Location: New Hamburg, Ontario
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I've figured out what I'm doing wrong. My mouse is set too fast. By the time I get the second click I've moved off the wire slightly. Thanks.
Last edited by jwilhelm; 22nd August 2014 at 02:08 PM. |
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#50 |
diyAudio Moderator
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Excellent. A speedy mouse
![]() (these are all useful things to know actually because if its done it for you it will do it for others too)
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Installing and using LTspice IV. From beginner to advanced. |
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