Tube circuit sim software for free? - Page 2 - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 31st March 2014, 03:56 PM   #11
diyAudio Member
 
Join Date: May 2010
Quote:
Originally Posted by dirkwright View Post
Any of the flavors of Spice (sorry.... <g>) will be able to simulate vacuum tube circuitry.
hahaha lets spice it up.

beautiful work on your facebook page. fredericksburg VA is one of my favorite towns, especially for antique hunting. your front panels look great!
  Reply With Quote
Old 31st March 2014, 06:16 PM   #12
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by buildafriend View Post
hahaha lets spice it up.

beautiful work on your facebook page. fredericksburg VA is one of my favorite towns, especially for antique hunting. your front panels look great!
Thanks! much appreciated. It's really amazing how much it takes to make something that looks good enough that someone would like to buy it. I don't think we are there yet, but we're getting better.
  Reply With Quote
Old 31st March 2014, 07:29 PM   #13
diyAudio Member
 
Join Date: May 2010
are you working in front panel express? I only got one made but it was a good experience. they went as far as contacting me with a real human being to correct a small mistake I made. The product looked great too.
  Reply With Quote
Old 31st March 2014, 07:34 PM   #14
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by buildafriend View Post
are you working in front panel express? I only got one made but it was a good experience. they went as far as contacting me with a real human being to correct a small mistake I made. The product looked great too.
No, they are expensive. The panels you see on the FB page are from a trophy shop. I made the design by hand on paper, brought it to them, and they made it out of thin self-stick aluminum sheet. Then I stuck it on the panel that came with the box. We are moving away from this technique to engraving directly on the aluminum front panel. I bought an engraver for this purpose and we are working out the details of how to do it best.
  Reply With Quote
Old 31st March 2014, 07:49 PM   #15
diyAudio Member
 
Join Date: May 2010
great idea with the trophy shop thing. I might try that soon! front panel express can be a bit costly.. but I do believe that its a good product. If you can afford a milling/CNC system at home then more power to you! congrats on sling-shotting yourself forward and I look forward to seeing what you end up with.

I watched a tutorial video on youtube about the spice engine. it explained that the spice engine was designed at berklee and that its the basis of most circuit simulator programs, even some very expensive ones. I'm currently trying to sort out how to enter the tube characteristics of a 12AX7.. I figured out that the component libraries are under the logic gate looking symbol. I found the triode, I right clicked and figured out how to somewhat alter the connections of the schematic symbol but how do I change the mu, transconductance curves, and or operational parameters..

Last edited by buildafriend; 31st March 2014 at 07:51 PM.
  Reply With Quote
Old 31st March 2014, 07:58 PM   #16
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
Quote:
Originally Posted by buildafriend View Post
great idea with the trophy shop thing. I might try that soon! front panel express can be a bit costly.. but I do believe that its a good product. If you can afford a milling/CNC system at home then more power to you! congrats on sling-shotting yourself forward and I look forward to seeing what you end up with.

I watched a tutorial video on youtube about the spice engine. it explained that the spice engine was designed at berklee and that its the basis of most circuit simulator programs, even some very expensive ones. I'm currently trying to sort out how to enter the tube characteristics of a 12AX7.. I figured out that the component libraries are under the logic gate looking symbol. I found the triode, I right clicked and figured out how to somewhat alter the connections of the schematic symbol but how do I change the mu, transconductance curves, and or operational parameters..
Yes, Front Panel Express makes an excellent product. We just didn't want to pay their price. The trophy shop was much less expensive.

We do not have a CNC engraver/router. I bought an old fashioned pantagraph type of hand engraver. I still paid $350 for it brand new. They normally sell for over $1,000. A CNC engraver with computer would be at least that much for a cheap Chinese one.

Ok, to get a 12AX7, you need to find in your software where you can create a macro. In Tina, it's under "Tools". Here is a PSpice compatible model:

.subckt 12ax7 P G K
Gp P K VALUE={((0.001149607902m)+(0.0001063352726m)*V(G,K ))*limit((91.16514401)*V(G,K)+V(P,K)+(52.29904339) ,0.0,1.0e16)**1.5 * V(P,K)/(V(P,K)+(2.177964467))}
Cgp G P 1.7pF
Cgk G K 1.6pF
Cpk P K 0.46pF
.ends 12ax7

You save this as a .lib file and then find it from your spice software macro wizard/creator. You should be able to follow the instructions from there.

At the top of this forum is an entire thread devoted to spice models of vacuum tubes.
  Reply With Quote
Old 31st March 2014, 08:02 PM   #17
diyAudio Member
 
Join Date: May 2010
THANKS!!

best of luck with the pantograph.

Last edited by buildafriend; 31st March 2014 at 08:08 PM.
  Reply With Quote
Old 1st April 2014, 12:12 AM   #18
diyAudio Member
 
Join Date: May 2010
ugh.. I spent all day trying to get this working and still no luck. I think the insert macro button is the one of the top far right? that allowed me to put what you see on the page with dirkwrights code.

I got this far..
Click the image to open in full size.

and then every time I click run it tells me "can not detect this circuits steady state."

I don't think I am skilled enough with computers to insert the macros on my own. I wish these programs could just come with the basic tubes.. like 12ax7, 6L6.. etc.

I downloaded TINA 9 from the link on the first page of this thread. it opens fine and it seems like there are more TINA users here over LTspice users. I would prefer to be on the same platform as most of the folk in this forum. Maybe some kind soul could help me get started with importing tube models into TINA - 9?

Last edited by buildafriend; 1st April 2014 at 12:39 AM.
  Reply With Quote
Old 1st April 2014, 01:54 AM   #19
diyAudio Member
 
dirkwright's Avatar
 
Join Date: May 2011
Location: Virginia
There are probably more LTspice users, but I can help you with Tina.

Here is what you do. As I said, use Notepad (or a text only editor) and put that code in there. Save the file as 12AX7.lib. Open Tina, and go to "Tools", then "New Macro Wizard". In the window, give your macro a name, like 12AX7. Then just below that is "from file" and on the right is a small button. Click that button and a window opens. Find your 12AX7.lib file and select it. Then click "Next" and continue until it compiles and says it's ready to use. Good luck.

In your simulation above, you have the output connected to the grid when it should be connected to the plate.
  Reply With Quote
Old 1st April 2014, 02:07 AM   #20
diyAudio Member
 
Join Date: May 2010
Quote:
Originally Posted by dirkwright View Post
There are probably more LTspice users, but I can help you with Tina.

Here is what you do. As I said, use Notepad (or a text only editor) and put that code in there. Save the file as 12AX7.lib. Open Tina, and go to "Tools", then "New Macro Wizard". In the window, give your macro a name, like 12AX7. Then just below that is "from file" and on the right is a small button. Click that button and a window opens. Find your 12AX7.lib file and select it. Then click "Next" and continue until it compiles and says it's ready to use. Good luck.

In your simulation above, you have the output connected to the grid when it should be connected to the plate.
ahaha thanks for catching that. maybe thats why it wont work! Because the circuit is wrong!

as for TINA
I got up to here and then the next button stops working. Should I just exit the window and search for my 12ax7?
Click the image to open in full size.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
questions about some sim software TUBESMAN Tubes / Valves 12 15th March 2013 12:57 AM
crossover sim software? mondogenerator Software Tools 5 19th January 2011 06:05 AM
Free software for logic circuit simulator mannycc Digital Source 2 16th September 2010 04:09 PM
free Tina ti circuit sim for crossover design sreten Multi-Way 2 2nd February 2006 12:10 AM
I'm searching spl file to be import in my sim. software ermes Multi-Way 2 25th October 2004 05:44 PM


New To Site? Need Help?

All times are GMT. The time now is 06:38 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2