It's plated with both metals. You should ask at a chemistry forum, I haven't built it yet -- probably the last part of the project.
Horn-loaded corona discharge... UGH
Horns ALWAYS add coloration and are a cheap way to extend the bottom of the frequency response.
Corona discharge is inferior to glow discharge, but much easier to get stable.
Horns ALWAYS add coloration and are a cheap way to extend the bottom of the frequency response.
Corona discharge is inferior to glow discharge, but much easier to get stable.
@bernard,
I have seen some pictures of your plasma tweeters. Do you have some more information regarding your speakers? I know you have solved the ozon problem with the high temp in your speaker. You use some kind of horn. What schematic do you use and what does your flame thrower look like?
I have seen some pictures of your plasma tweeters. Do you have some more information regarding your speakers? I know you have solved the ozon problem with the high temp in your speaker. You use some kind of horn. What schematic do you use and what does your flame thrower look like?
Nixie said:
Ummm... no. Horns do not ALWAYS add coloration. Much depends on two big factors: the inherent distortion of the driver and the HOM (higher order modes) for a given horn + driver combination!
One can make a horn with frighteningly low distortion and nil coloration. It's just that most examples that are found do not fit that bill. The addition of "coloration" is not an inherent quality of all horns by any stretch of the imagination.
_-_-bear
I did some research and I want to build one.
one question what is the differents in driving the flame with a fet in stead of a tube.
I don't understand why you can't get the same (good) results with a fet?
one question what is the differents in driving the flame with a fet in stead of a tube.
I don't understand why you can't get the same (good) results with a fet?
Is this of interest?
http://web.mit.edu/dzshen/www/home_...lPaperV1_3.pdf#search="plasma mosfet tweeter"
http://web.mit.edu/dzshen/www/home_...lPaperV1_3.pdf#search="plasma mosfet tweeter"
yeah this is probably the first hit of google if your searching for plasma tweeters. very usefull!
Yes it was, as a matter of fact, but I posted it for a reason. When I was building these tweeters, I was thinking along the same lines of using fets. I was following a project at some uni where the students were designing one from scratch. It wasn't finished.
Today whilst searching, I couldn't find the project I was following before, but I found this one, and it appears to be more complete than the other. Maybe it is the same one.
I didn't follow up with that project, so I can't help you further 🙁
Today whilst searching, I couldn't find the project I was following before, but I found this one, and it appears to be more complete than the other. Maybe it is the same one.
I didn't follow up with that project, so I can't help you further 🙁
Should have used the edit button... i know
But i had a question in my mind and i had to ask it; can the coil be replaced by a transmisionline.
It should have a few atvantages like no influences to other magnetic fields ect...
But i had a question in my mind and i had to ask it; can the coil be replaced by a transmisionline.
It should have a few atvantages like no influences to other magnetic fields ect...
The coil is the resonance device at the heart of a plasma tweeter. Yes, electromagnetic radiation is a drama with these tweeters (as the flourescent tubes will show 😀)
Hi,
my test plasma tweeter is working, but after few minutes tube PL519 get red. Maximum size of flame was 6mm. Sound is very pleasant.
I built this one:
http://www.hardcoreaudio.de/plasmatweeter.htm
Maybe someone can help how to optimize circuit.
I know that flame dont like metal near.
regards, Bostjan
my test plasma tweeter is working, but after few minutes tube PL519 get red. Maximum size of flame was 6mm. Sound is very pleasant.
I built this one:
http://www.hardcoreaudio.de/plasmatweeter.htm
Maybe someone can help how to optimize circuit.
I know that flame dont like metal near.
regards, Bostjan
Attachments
FWIW, I had the occasional red plate which IIRC was related to the coil. I experimented with various windings with various results. Your flame does look good. I feel you could extend it maybe 2-3 times in length and present a better load to the output device.
Your windings are very close. This creates a high interwinding capacitance and the resonance Q is less than optimum. You may have better results if you leave a 3-5mm gap between each winding. I would keep the same number of turns.
Nixie, that's a pretty impressive block of work you've done 🙂. Where could I find the latest info on it?
Your windings are very close. This creates a high interwinding capacitance and the resonance Q is less than optimum. You may have better results if you leave a 3-5mm gap between each winding. I would keep the same number of turns.
Nixie, that's a pretty impressive block of work you've done 🙂. Where could I find the latest info on it?
Hi Indm,
thank you for reply.
I will try today 3-5mm gap between each winding and make report.
Ceramic base i got as sample of one ceramic factory here in Slovenia.
I attach one foto more, if someone would interested to build.
This is just test setup. I plan to build maybe with alu horn.
regards, Bostjan
thank you for reply.
I will try today 3-5mm gap between each winding and make report.
Ceramic base i got as sample of one ceramic factory here in Slovenia.
I attach one foto more, if someone would interested to build.
This is just test setup. I plan to build maybe with alu horn.
regards, Bostjan
Attachments
Hi,
yesterday i tried with your sugestion of Tesla coil.
Distance between windings was 5mm.
Flame gets 2x bigger and efficiency is also better. javascript:smilie('😉')
wink
Music is now louder than before.
But still tube is getting red after 2 minutes.
Is it related this to the tesla coil?
regards, Bostjan😉
yesterday i tried with your sugestion of Tesla coil.
Distance between windings was 5mm.
Flame gets 2x bigger and efficiency is also better. javascript:smilie('😉')
wink
Music is now louder than before.
But still tube is getting red after 2 minutes.
Is it related this to the tesla coil?
regards, Bostjan😉
