Search found 15 matches
- Mon Apr 20, 2015 8:03 pm
- Forum: Sim City
- Topic: IEC Tape Source Model
- Replies: 0
- Views: 9359
IEC Tape Source Model
With the help of others, I've been able to create LTspice Laplace models for both RIAA phono and NAB tape sources, which I use to evaluate RIAA and NAB playback circuits. But I haven't figured out how to model an IEC tape source. The difference between NAB and IEC, as I understand it, is that the NA...
- Wed Apr 09, 2014 4:31 am
- Forum: Phono
- Topic: One of Arthurs early schematics.
- Replies: 2
- Views: 7496
- Tue Mar 18, 2014 5:48 pm
- Forum: Sim City
- Topic: LTspice - simulation error
- Replies: 1
- Views: 8274
If you would post your schematic and the SPICE models you are trying to use someone might be able to help. Having said that, it's important to make sure that the symbols you use in your LTspice schematic match the device models you have. From your description, here is what I think is going on. First...
- Fri Jun 14, 2013 8:43 pm
- Forum: Sim City
- Topic: Help needed with tube simulation by LTSpice
- Replies: 2
- Views: 7372
There are a few things that I recommend you change in this circuit. First, the tube has about 0 volts grid-to-cathode bias, owing to a signal source with a 2 volt DC offset. In a Class A circuit you always want the grid to be negative with respect to the cathode; if not, you will get significant out...
- Tue Mar 19, 2013 4:39 am
- Forum: Sim City
- Topic: Drop Down Menus for selecting your tube
- Replies: 28
- Views: 62458
You really don't have to go through the steps in section 2 of Stephie's original email because the resulting files are contained in the tubestuff.zip file. Unzip the files in that archive and copy them into the suggested folders. Then you will be able to add the drop-down symbol to your schematic (l...
- Wed Jan 09, 2013 4:47 pm
- Forum: Sim City
- Topic: how to translate spice model to ltspice standard?
- Replies: 4
- Views: 12139
Make sure that the name you give to the MOSFET in your schematic matches the subcircuit definition exactly (except for upper/lower case, which isn't important). In your subcircuit file, this would be ZVN0545G (the G is part of the name). It looks like you have left the device name as NMOS, which is ...
- Mon Jan 07, 2013 4:28 pm
- Forum: Sim City
- Topic: how to translate spice model to ltspice standard?
- Replies: 4
- Views: 12139
The devices in the standard.mos file are defined by the MODEL directive, whereas your ZVN0545G model is a SUBCKT (subcircuit). So you can't easily add this model to the standard.mos file. Instead, here is what I recommend you do. Save the Zetex ZVN0545G model to a file named ZVN0545G.inc. Put this f...
- Wed Nov 21, 2012 8:43 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
Stephie, I'm simulating the stock Dynaco ST-70 in stages and ran into some warnings and errors when using the 6CA7_EL34 model in the tetrode.txt library. I've attached the LTspice schematic for the output stage only, along with the log file from a transient simulation. (The warning about the single ...
- Tue Nov 20, 2012 8:38 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
- Sat Nov 17, 2012 8:31 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
Thanks, Stephie. My original ST-70 schematic had an incorrect B+ supply but the corrected version I posted shortly thereafter seems to produce reasonable results with your new model. The plate currents for the pentode and triode sections look about right, based on analysis of the original power supp...
- Wed Nov 07, 2012 8:29 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
- Tue Oct 16, 2012 8:00 pm
- Forum: Sim City
- Topic: Drop Down Menus for selecting your tube
- Replies: 28
- Views: 62458
- Mon Oct 15, 2012 9:33 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
- Mon Oct 15, 2012 7:03 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
- Sun Oct 14, 2012 5:56 pm
- Forum: Sim City
- Topic: SPICE Models for the 7199 Pentode-Triode
- Replies: 13
- Views: 20254
SPICE Models for the 7199 Pentode-Triode
For Stephie: I am a newcomer to this forum and would like to say "thanks" for all the work you have put into making SPICE models available to the rest of us. One model that I miss is the 7199 pentode-triode used in the Dynaco amplifiers. I've simulated the ST-70 driver circuit in LTspice u...