Anyone come across an exponentially tapered
transmission line, apart from the B&W Nautilus?
It looks like it would be an amusing project.
An infinite length exponential taper has a finite
internal volume so all I need is to find a wall material
with zero thickness :-)

Roger.

"The Old Fogey" wrote in message
om...
Anyone come across an exponentially tapered
transmission line, apart from the B&W Nautilus?
It looks like it would be an amusing project.
An infinite length exponential taper has a finite
internal volume so all I need is to find a wall material
with zero thickness :-)

Roger.

try here http://www.t-linespeakers.org/projects/index.html

"The Old Fogey" wrote in message
om...
Anyone come across an exponentially tapered
transmission line, apart from the B&W Nautilus?
It looks like it would be an amusing project.
An infinite length exponential taper has a finite
internal volume so all I need is to find a wall material
with zero thickness :-)

Roger.

try here http://www.t-linespeakers.org/projects/index.html

"malcolm" wrote in message news:PPQ9b.480052$Ho3.81431@sccrnsc03...


try here http://www.t-linespeakers.org/projects/index.html

No good. They are almost all quarter-wave lagged organ-pipes and the
tapered ones are so short that they are really closed-boxes or
bass-reflex.

This is more the thing:

http://www.bwspeakers.com/index.cfm/...del%20Nautilus

Though a TL for a tweeter is rather pointless, it looks good.

Roger.

"malcolm" wrote in message news:PPQ9b.480052$Ho3.81431@sccrnsc03...


try here http://www.t-linespeakers.org/projects/index.html

No good. They are almost all quarter-wave lagged organ-pipes and the
tapered ones are so short that they are really closed-boxes or
bass-reflex.

This is more the thing:

http://www.bwspeakers.com/index.cfm/...del%20Nautilus

Though a TL for a tweeter is rather pointless, it looks good.

Roger.

"The Old Fogey" wrote in message
...
"malcolm" wrote in message
news:PPQ9b.480052$Ho3.81431@sccrnsc03...


try here http://www.t-linespeakers.org/projects/index.html

No good. They are almost all quarter-wave lagged organ-pipes and the
tapered ones are so short that they are really closed-boxes or
bass-reflex.

This is more the thing:


http://www.bwspeakers.com/index.cfm/.../label/Model%2
0Nautilus

Though a TL for a tweeter is rather pointless, it looks good.

Roger.

yes , but what price?
they look like they are made of plastic!!

"The Old Fogey" wrote in message
...
"malcolm" wrote in message
news:PPQ9b.480052$Ho3.81431@sccrnsc03...


try here http://www.t-linespeakers.org/projects/index.html

No good. They are almost all quarter-wave lagged organ-pipes and the
tapered ones are so short that they are really closed-boxes or
bass-reflex.

This is more the thing:


http://www.bwspeakers.com/index.cfm/.../label/Model%2
0Nautilus

Though a TL for a tweeter is rather pointless, it looks good.

Roger.

yes , but what price?
they look like they are made of plastic!!

In article , The Old
Fogey wrote:
Anyone come across an exponentially tapered transmission line, apart
from the B&W Nautilus? It looks like it would be an amusing project. An
infinite length exponential taper has a finite internal volume so all I
need is to find a wall material with zero thickness :-)

It has just occurred to me that another problem in use would be the
propagation delay along an infinitely long transmission line might mean
you'd have to wait some time after starting to play the music before you
heard anything! Might be best to press 'play' then go and have your
dinner... :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

In article , The Old
Fogey wrote:
Anyone come across an exponentially tapered transmission line, apart
from the B&W Nautilus? It looks like it would be an amusing project. An
infinite length exponential taper has a finite internal volume so all I
need is to find a wall material with zero thickness :-)

It has just occurred to me that another problem in use would be the
propagation delay along an infinitely long transmission line might mean
you'd have to wait some time after starting to play the music before you
heard anything! Might be best to press 'play' then go and have your
dinner... :-)

Slainte,

Jim

--
Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm
Audio Misc http://www.st-and.demon.co.uk/AudioMisc/index.html
Armstrong Audio http://www.st-and.demon.co.uk/Audio/armstrong.html
Barbirolli Soc. http://www.st-and.demon.co.uk/JBSoc/JBSoc.html

On Fri, 19 Sep 2003 09:12:46 +0100, Jim Lesurf
wrote:

In article , The Old
Fogey wrote:
Anyone come across an exponentially tapered transmission line, apart
from the B&W Nautilus? It looks like it would be an amusing project. An
infinite length exponential taper has a finite internal volume so all I
need is to find a wall material with zero thickness :-)

It has just occurred to me that another problem in use would be the
propagation delay along an infinitely long transmission line might mean
you'd have to wait some time after starting to play the music before you
heard anything! Might be best to press 'play' then go and have your
dinner... :-)

Um, the line absorbs the back radiation.......
--

Stewart Pinkerton | Music is Art - Audio is Engineering