Kind of cool check it out

nhuwar · 14th February 2008, 12:19 PM

http://matrixsynth.blogspot.com/2008...ntriguing.html

Nick

kevinkr · 14th February 2008, 04:36 PM

Hi Nick,
That was pretty weird...

An alcohol burning open air flame triode which apparently works...

poynton · 14th February 2008, 05:40 PM

I did an experiment while at school in the late '60s.
I got the idea from an American Hobbyist magazine.

It was essentially the same but using a lab. bunsen burner - a more controllable flame.

The metal burner was the 'cathode' - electrons supplied via a wick from a bottle of copper sulphate - nice bule flame

The modulation was supplied via a mains transformer in reverse between 'cathode' and 'grid'.

HT from a lab power supply.

At a school science fair, we placed it in the centre of the lab with a walkway round the outside (to prevent contact with the HT) and hid all the wires so we had a flame playing music !!

Andy

bigwill · 14th February 2008, 08:12 PM

One approach to a directly heated triode!

I wonder how it sounds?

nhuwar · 14th February 2008, 08:16 PM

Well a flame is plasma so it's basically the same as an electron beam. Just would have never thought to try it.

HaHaHa thats funny I never thought about that, Its a REAL dht LOL

Nick

14th February 2008, 12:19 PM	#1
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Kind of cool check it out http://matrixsynth.blogspot.com/2008...ntriguing.html Nick

14th February 2008, 04:36 PM	#2
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Hi Nick, That was pretty weird... An alcohol burning open air flame triode which apparently works... __________________ www.kta-hifi.net

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14th February 2008, 05:40 PM	#3
poynton Magneto the Gravity Man diyAudio Member Join Date: Mar 2005 Location: A life on the ocean waves when I'm not at home in N. Wales (but I'm not Welsh so no sheep jokes!)	I did an experiment while at school in the late '60s. I got the idea from an American Hobbyist magazine. It was essentially the same but using a lab. bunsen burner - a more controllable flame. The metal burner was the 'cathode' - electrons supplied via a wick from a bottle of copper sulphate - nice bule flame The modulation was supplied via a mains transformer in reverse between 'cathode' and 'grid'. HT from a lab power supply. At a school science fair, we placed it in the centre of the lab with a walkway round the outside (to prevent contact with the HT) and hid all the wires so we had a flame playing music !! Andy

14th February 2008, 08:12 PM	#4
bigwill diyAudio Member Join Date: Dec 2004 Location: UK	One approach to a directly heated triode! I wonder how it sounds?

14th February 2008, 08:16 PM	#5
nhuwar diyAudio Member Join Date: Jan 2007 Location: Tomball Texas	Well a flame is plasma so it's basically the same as an electron beam. Just would have never thought to try it. HaHaHa thats funny I never thought about that, Its a REAL dht LOL Nick

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