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Simulation of ML-TQWT with Mathcad question
Simulation of ML-TQWT with Mathcad question
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Old 10th January 2021, 10:03 AM   #1
sladdbarn is offline sladdbarn  Sweden
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Default Simulation of ML-TQWT with Mathcad question

Im doing a ML-TQWT simulation with Mathcad worksheet ML TQWT.mcd.

Is it possible to simulate with for an example 10*12" at the bottom and 6*8" at the top?

Another question, is it possible to change from inch to cm?
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Old 18th January 2021, 06:22 PM   #2
sladdbarn is offline sladdbarn  Sweden
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I think i figured it out, used a different worksheet.

Can anyone confirm that it does look okay?
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File Type: pdf Windows XP printed document.pdf (803.2 KB, 21 views)
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Old 19th January 2021, 01:01 AM   #3
GM is offline GM  United States
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At a glance it looks fine except the sim doesn't match your original dimensions/shape, but haven't used the later worksheets, so best to ask at his FB Grp.
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Old 19th January 2021, 05:24 AM   #4
sladdbarn is offline sladdbarn  Sweden
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Quote:
sim doesn't match your original dimensions/shape
You mean the numbers in the first post? Thats just an example

Whats the name of the facebook group?

Last edited by sladdbarn; 19th January 2021 at 05:27 AM.
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Old 19th January 2021, 05:47 AM   #5
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by sladdbarn View Post
Whats the name of the facebook group?
DIY Transmission Line Loudspeakers - Theory, Design, and Building
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www.hornresp.net
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Old 19th January 2021, 07:32 AM   #6
sladdbarn is offline sladdbarn  Sweden
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Thank you David!
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Old 21st January 2021, 05:07 AM   #7
BP1Fanatic is offline BP1Fanatic  United States
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Looking at your attachment, that is not a TQWT.

TQWT can have 2 meanings.

1. Tapered Quarter Wave Tube or basically the whole enclosure is a negative flare port and the speaker is mounted on an external panel.

Positive flare = Back Loaded Horn.
Straight flare = Transmission Line.

2. Tapped Quarter Wave Tube or a straight flare tapped horn where the speaker is mounted on an internal panel.

Positive flare = Tapped Horn.
Negative flare = Tapered Tapped Quarter Wave Tube.

Here is my T-TQWT.
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File Type: jpg from Handset_20120103120908_61.jpg (35.1 KB, 68 views)
File Type: jpg 20200118_140416.jpg (755.6 KB, 68 views)
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Old 21st January 2021, 05:10 PM   #8
GM is offline GM  United States
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Per MJK he has a positive flare vented [ML] TQWT whereas me and some others prefer to further define them as ML-horns. This disagreement with him was one of the reasons he left the forums.
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Old 21st January 2021, 05:15 PM   #9
GM is offline GM  United States
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Yeah, I made the mistaken assumption that by using his software that he was familiar with MJK's site where both FB links are prominently displayed: Quarter Wavelength Loudspeaker Design
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Old 21st January 2021, 05:48 PM   #10
Booger weldz is offline Booger weldz  United States
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Quote:
Originally Posted by GM View Post
Per MJK he has a positive flare vented [ML] TQWT whereas me and some others prefer to further define them as ML-horns. This disagreement with him was one of the reasons he left the forums.
But his constant pointless name game nitpicking and unfortunate ..(since then slowly the ‘horn’ word became less of a pet peeve...but too late and the clash of the titans could gave been the brainstorming or two well equipped brain powers( fact, not brown nosed .), is a shame. Because to anyone whos messed around with the top pictured, its clear what that can and is able yo uniquely give unit a hornlike name. Put a hivi 4”b4n in there and its akwardly at 40hz Fb and its a bit serious about making sure you cab hear it. mass loaded sensitive with an attitude mini monster horn shaped expanding path TL , whatever! But more importantky Mr King, sir. Its a great design for some legitimate and real reasons..
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