Transmission Line Modelling Software - Page 46 - diyAudio
Go Back   Home > Forums > Design & Build > Software Tools

Software Tools SPICE, PCB CAD, speaker design and measurement software, calculators

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 29th May 2013, 12:44 PM   #451
aczern is offline aczern  Poland
diyAudio Member
 
Join Date: May 2008
Location: Poland
I do not know what was wrong, but now it works.
  Reply With Quote
Old 31st May 2013, 10:56 AM   #452
schmeet is offline schmeet  United Kingdom
diyAudio Member
 
schmeet's Avatar
 
Join Date: Mar 2008
I'm glad it's working for you. I said before that I used it on Windows 8, I actually meant Windows 7 but it's good that it works on 8 too!
__________________
Transmission Line Modelling Software
  Reply With Quote
Old 9th August 2013, 11:17 PM   #453
viki_v2 is offline viki_v2  India
diyAudio Member
 
viki_v2's Avatar
 
Join Date: Feb 2009
Location: India (Mumbai)
Hello Schmeet, I have installed the software and am exploring the many functions. Though many have shared the ways of creating a model. kindly guide How I can Stimulate a MLTL with certain port size. And also how to offset the driver location say driver position 9" from Internal top.
__________________
If you try to find a fool, the first person you find is yourself.

Last edited by viki_v2; 9th August 2013 at 11:26 PM.
  Reply With Quote
Old 9th August 2013, 11:33 PM   #454
diyAudio Member
 
Greebster's Avatar
 
Join Date: Aug 2010
Location: South of the Skyway
Select object, right click and select Split Element. This point can now be moved where you need. Now right click on the last element in the chain that was created and select Add Branch. This element can now be defined as your port.
  Reply With Quote
Old 10th August 2013, 12:02 AM   #455
viki_v2 is offline viki_v2  India
diyAudio Member
 
viki_v2's Avatar
 
Join Date: Feb 2009
Location: India (Mumbai)
Quote:
Originally Posted by Greebster View Post
Select object, right click and select Split Element. This point can now be moved where you need. Now right click on the last element in the chain that was created and select Add Branch. This element can now be defined as your port.
Can you do a sample diagram for me to understand.
i want to check the effect of driver when used in 7.5"W x 8"D x 38" H Enclosure. with port dimension of 7.2 cm x 4" length, and difference it would make by changing port length.

Also kindly verify the 1:10 tapered Tl enclosure I tried to Model.
Remove the txt tag from File name extension is tlp. I had to do this to get file attached.
Attached Files
File Type: txt M16KH - Copy.tlp.txt (619 Bytes, 15 views)
__________________
If you try to find a fool, the first person you find is yourself.

Last edited by viki_v2; 10th August 2013 at 12:13 AM.
  Reply With Quote
Old 13th August 2013, 09:12 AM   #456
schmeet is offline schmeet  United Kingdom
diyAudio Member
 
schmeet's Avatar
 
Join Date: Mar 2008
I have looked at your TL model and it looks fine. You have modelled a 1:10 tapered TL enclosure. (Whether that is a good enclosure I haven't considered though).

So, the steps I took to get your 7.5"W x 8"D x 38" H Enclosure are as follows:

Click on the element and set the start area and end area to 60in (7.5 x 8).
Set it's length to 38in.
Then click the boundary checkbox to make it a closed end. You now have a closed box.

We need to add a port so right click on whitespace and select "Add Rear Element".

This is your port. Make it 4in long and make the start/end areas 40.7cm (assuming 7.2cm is the diameter?).

You then need to make sure that the end of teh port is open so check the Boundary Checkbox.
Attached Files
File Type: txt viki_v2.tlp.txt (734 Bytes, 17 views)
__________________
Transmission Line Modelling Software
  Reply With Quote
Old 22nd October 2013, 10:44 PM   #457
abcdmku is offline abcdmku  United States
diyAudio Member
 
Join Date: Mar 2012
Location: Chicago
When adding stuffing to the simulation, lets say its set on medium. The element side bar shows it has a stuffing value of 1. What unit is that? Is that equivalent to one pound?
  Reply With Quote
Old 23rd October 2013, 08:55 AM   #458
Kolbrek is offline Kolbrek  Norway
diyAudio Member
 
Kolbrek's Avatar
 
Join Date: Aug 2007
Yes, it would be interesting to know what the stuffing value actually means. It would also be very interesting to know what mathematical model you use to simulate the effect of stuffing.

Regards,
Bjrn
__________________
Dynamics to the people!
  Reply With Quote
Old 23rd October 2013, 03:24 PM   #459
schmeet is offline schmeet  United Kingdom
diyAudio Member
 
schmeet's Avatar
 
Join Date: Mar 2008
Hi Bjorn, abc,

At present the stuffing just applies an empirically derived resistance into the model.
I have been trying to find something that is more based on physics but such models don't seem to exist.

So, the stuffing number doesn't have a unit it's just an arbitrary number. I added the Low,Medium and High values to give an idea of what kind of range you should be working with.

If you compare a model to measured or published data then the values are roughly about right.

In all honesty it doesn't really matter too much, because when you add stuffing, you add it by adding how much you need. You don't weigh out 3Kg of mineral and place it in the exact right position. You play with it until it's right.

This stuffing in the model should be used to give you an idea of how the response can be smoothed out with stuffing.

That said, I will still endeavour to implement a better model for stuffing if I come across one.
__________________
Transmission Line Modelling Software
  Reply With Quote
Old 24th October 2013, 01:34 PM   #460
abcdmku is offline abcdmku  United States
diyAudio Member
 
Join Date: Mar 2012
Location: Chicago
Quote:
You don't weigh out 3Kg of mineral and place it in the exact right position.
haha very true.

This is what I thought of whenever using the low medium and high:

Low:
Click the image to open in full size.

High: (im sure you guys will recognize this picture)
Click the image to open in full size.

and Medium just somewhere between there.

I wasn't sure if the number had an actual measurement though.

Thanks schmeet!
  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
TLwrx v 3.0 Transmission Line Software CarlosT Subwoofers 16 27th March 2008 04:25 PM
3 Way Crossover modelling Software? Grahame Multi-Way 3 13th May 2007 04:50 AM
Matlab-based triode modelling software Radames Tubes / Valves 1 16th September 2005 07:36 PM
3d modelling software greg_mcquaid Multi-Way 17 22nd May 2004 07:03 AM


New To Site? Need Help?

All times are GMT. The time now is 06:11 PM.


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