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4hv.org :: Forums :: High Voltage
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NAGRA Chief Designer uses that PLASMA Speaker, picture of it and DIY

Author Post
Mustafa Umut Sarac
Tue May 16 2017, 12:49AM Print View
Registered Member #8520
Joined: Wed Dec 05 2012, 02:21PM
Location:
Posts: 1
Hello there,

NAGRA is one of the best HI FI designers in the world and equipment goes for 50K and several times more. But their chief designer uses an plasma speaker for to listen the electronics. Here is the picture of the circuit and I want to build the same.

Please help me , I want to own a high end speaker like it.

FIND ATTACHHED OPEN CIRCUIT PICTURE. He uses Shuguang 807.

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johnf
Tue May 16 2017, 05:14AM
Registered Member #230
Joined: Tue Feb 21 2006, 08:01PM
Location: Gracefield lower Hutt
Posts: 213
Ionofane used a cathode modulated class C rf oscillator at 27MHz.
cathode AM modulation does not allow 100% modulation so the arc of the ion source never extinguishes.
There was another in the late 70's that used a helium tank to supply the ion source so the quartz ionisation chamber lasted longer and helium has a much better expansion ratio so was louder
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Sulaiman
Fri Aug 11 2017, 11:51AM
Registered Member #162
Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 2820
Mustafa Umut Sarac wrote ...

Hello there,

NAGRA is one of the best HI FI designers in the world and equipment goes for 50K and several times more. But their chief designer uses an plasma speaker for to listen the electronics. Here is the picture of the circuit and I want to build the same.

Please help me , I want to own a high end speaker like it.




I suspect that is a staged photograph,
what kind of expert leaves the high voltage parts exposed,
generates high power rfi next to their test equipment,
likes to inhale vapourised copper,
and mounts it so that the heat of the valve softens the plastic ?
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Conundrum
Sat Aug 12 2017, 06:03AM
Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: Republic of Guernsey
Posts: 3803
Might be a prototype?
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