BTW...
John R. Whittaker has also newer site with some practical construction tips for ~2 meter long true ribbons:
http://www.snippets.org/alsr/
go ->
"Considerations on the Optimal Design of True Ribbon Loudspeakers - A Cautionary Tale."
This information is just GREAT but still under construction. Last update was 22 June 2003. I would like to know more about details. Anyone know what mr Whittaker is doing nowdays and if there is updated pages somewhere? Couldn´t find one.
John R. Whittaker has also newer site with some practical construction tips for ~2 meter long true ribbons:
http://www.snippets.org/alsr/
go ->
"Considerations on the Optimal Design of True Ribbon Loudspeakers - A Cautionary Tale."
This information is just GREAT but still under construction. Last update was 22 June 2003. I would like to know more about details. Anyone know what mr Whittaker is doing nowdays and if there is updated pages somewhere? Couldn´t find one.
How about the paper with an aluminum layer that can be found in sigarette packs, it might make a nice ribbon.
It can easily be cut with a pair of siccors.
It can also be found in some rolls of candy too.
It can easily be cut with a pair of siccors.
It can also be found in some rolls of candy too.
The links below are in swedish but might be of som use 🙂
a lot of pictures
The first 2 URL's are articles the thirs is a forum with pictures
and descriptions.
http://www.hififorum.nu/artiklar/Dahlbergsband/del1/Dahlbergsband_3.htm
http://www2.hififorum.nu/artiklar/dahlbergsband/del2/Dahlbergsband.htm
http://www2.hififorum.nu/forum/topic.asp?TOPIC_ID=34799
- B
a lot of pictures
The first 2 URL's are articles the thirs is a forum with pictures
and descriptions.
http://www.hififorum.nu/artiklar/Dahlbergsband/del1/Dahlbergsband_3.htm
http://www2.hififorum.nu/artiklar/dahlbergsband/del2/Dahlbergsband.htm
http://www2.hififorum.nu/forum/topic.asp?TOPIC_ID=34799
- B
I just did a quick test with a small ribbon made from the paper/aluminum foil from a sigarette pack.
I don't have any fancy magnets so I used a 40 watt elektromagnet, the efficiency was extremely low, I could only get the spl of a normal headphone, and it catches fire when you put in about 300 watts 😀
By examining some pieces of aluminum from the incinerated project I came to the conclusion that the alumimun layer is very very thin, it almost tears when touching it.
The paper might even help to damp some resonances I believe.
I don't have any fancy magnets so I used a 40 watt elektromagnet, the efficiency was extremely low, I could only get the spl of a normal headphone, and it catches fire when you put in about 300 watts 😀
By examining some pieces of aluminum from the incinerated project I came to the conclusion that the alumimun layer is very very thin, it almost tears when touching it.
The paper might even help to damp some resonances I believe.
Finished 4 Inch Ribbon Tweeters
I already finished these 4 inch ribbon tweeters. They are very efficient compared to other tweeters I have or have had. N52 Neo magnets and very efficient RF type matching transformer 18 to 1 It is basically primary inside of a copper tube. Idea is used for wideband high power RF amplifiers and works very well for this also. I have many photo's of one being made. Not an easy project.
I already finished these 4 inch ribbon tweeters. They are very efficient compared to other tweeters I have or have had. N52 Neo magnets and very efficient RF type matching transformer 18 to 1 It is basically primary inside of a copper tube. Idea is used for wideband high power RF amplifiers and works very well for this also. I have many photo's of one being made. Not an easy project.
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