Tom Danley's TOWER OF POWER - Page 17

GM · 24th January 2008, 03:15 PM

Interesting, I just assumed it was the same as the Contrabass.

djk · 24th January 2008, 08:03 PM

"does the motor rotate continuously in only one direction, "

How could that possibly work?

ed777 · 26th January 2008, 04:34 PM

So maybe the motor shaft turns back and forth. anyway, thanks again for the pictures djk.

Don Bunce · 26th January 2008, 05:06 PM

The audio signal is fed directly to the servo motor,which turns back and forth depending on polarity,driving the cones via the belts.

Page 2 of this link shows a diagram of how it works.

http://www.servodrive.com/Download_f...ContraBass.pdf

djk · 26th January 2008, 05:57 PM

"Interesting, I just assumed it was the same as the Contrabass."

It is, just the nomenclature is different. In the blurb on the Contrabass since it is a vented direct radiator system the vent substitutes are 18" passive radiators and the 15" passive radiators driven by the S shaped belt are called 'the active radiators'.

GM · 26th January 2008, 09:36 PM

Hmm, I guess I can't 'see the forest for the trees' because I'm looking at an assembled CB belt drive system and I wouldn't describe the belt drive as 'S' shaped or the stabilizer belt system as idler pulleys.

Oh well, it's academic since Don's posted something with a drawing of it. Thanks for clarifying the BT7 uses the same system if not the same parts.

GM

ed777 · 30th January 2008, 02:25 PM

any additional info with the BT7? How about the internal and external dimensions of the box? Does anyone have this info?

djk · 30th January 2008, 08:21 PM

Look at the Lab 12 sub, very close to what you want, and something you can actually build.

qi · 12th February 2008, 01:54 PM

...from the patent (page 25)

It is tri-fold -- appox 205"

The driver "taps in" at the beginning of the horn (0% offset)

The driver "taps out" 20% from the undersized mouth

microsound · 7th November 2008, 02:19 PM

Quote:

Originally posted by qi
...from the patent (page 25)

It is tri-fold -- appox 205"

The driver "taps in" at the beginning of the horn (0% offset)

The driver "taps out" 20% from the undersized mouth

Can you send the Link of this patent page...

24th January 2008, 03:15 PM	#161
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Interesting, I just assumed it was the same as the Contrabass. __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.

24th January 2008, 08:03 PM	#162
djk diyAudio Member Join Date: Feb 2001 Location: USA	"does the motor rotate continuously in only one direction, " How could that possibly work? __________________ Candidates for the Darwin Award should not read this author.

26th January 2008, 04:34 PM	#163
ed777 diyAudio Member Join Date: Jan 2008	oops So maybe the motor shaft turns back and forth. anyway, thanks again for the pictures djk.

26th January 2008, 05:57 PM	#165
djk diyAudio Member Join Date: Feb 2001 Location: USA	"Interesting, I just assumed it was the same as the Contrabass." It is, just the nomenclature is different. In the blurb on the Contrabass since it is a vented direct radiator system the vent substitutes are 18" passive radiators and the 15" passive radiators driven by the S shaped belt are called 'the active radiators'. __________________ Candidates for the Darwin Award should not read this author.

26th January 2008, 09:36 PM	#166
GM diyAudio Member Join Date: Jun 2003 Location: Chamblee, Ga.	Hmm, I guess I can't 'see the forest for the trees' because I'm looking at an assembled CB belt drive system and I wouldn't describe the belt drive as 'S' shaped or the stabilizer belt system as idler pulleys. Oh well, it's academic since Don's posted something with a drawing of it. Thanks for clarifying the BT7 uses the same system if not the same parts. GM __________________ Loud is Beautiful if it's Clean! As always though, the usual disclaimers apply to this post's contents.


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26th January 2008, 05:06 PM	#164
Don Bunce diyAudio Member Join Date: Mar 2007	The audio signal is fed directly to the servo motor,which turns back and forth depending on polarity,driving the cones via the belts. Page 2 of this link shows a diagram of how it works. http://www.servodrive.com/Download_f...ContraBass.pdf

30th January 2008, 02:25 PM	#167
ed777 diyAudio Member Join Date: Jan 2008	BT7 any additional info with the BT7? How about the internal and external dimensions of the box? Does anyone have this info?

30th January 2008, 08:21 PM	#168
djk diyAudio Member Join Date: Feb 2001 Location: USA	Look at the Lab 12 sub, very close to what you want, and something you can actually build. __________________ Candidates for the Darwin Award should not read this author.

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