Re: 4000 watt Audio Amp to drive Tesla coil (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Wed, 12 Sep 2007 17:31:50 +0200
From: Finn Hammer <f-h@xxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 4000 watt Audio Amp to drive Tesla coil (fwd)

Gary,

I was a lot like that back then :-)

And 2 years ago, I built these 6 coils together with Stephen Conner. We 
  made it possible that they could also play music.

http://youtube.com/watch?v=kjG4nVTKNHo

Cheers, Finn Hammer

Tesla list skrev:
> ---------- Forwarded message ----------
> Date: Tue, 11 Sep 2007 21:39:13 -0500 (GMT-05:00)
> From: gary350@xxxxxxxxxxxxx
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: 4000 watt Audio Amp to drive Tesla coil (fwd)
> 
> I have not read any of these posts yet so I have no idea what it is about.  
> The subject line, "4000 watt Audio Amp to drive Tesla coil." gave me an
> idea.
> 
> When I was in college I built some electro static speakers about 1974 or
> 1975.  That was so long ago I don't remember much other than the speakers
> worked on high voltage producing sound by repelling a surface because of
> the HV static charge.  The idea just came to me, wonder if you can
> modulate the tesla coil and play music over the sparks and streamers.  
> Would a 5KW TC produce 5KW of music and sparks? That would be cool a Tesla
> Coil musical concert with sparks and arcs.  When I was in college I was a
> long hair hippy freek, a bag of weed, a bottle of wine and a musical tesla
> coil would be far out, groovy man, I'm hip.  LOL..
> 
> 
> 
> 
> 
> 
> -----Original Message----- >From: Tesla list <tesla@xxxxxxxxxx> >Sent: Sep
> 11, 2007 2:31 PM >To: tesla@xxxxxxxxxx >Subject: Re: 4000 watt Audio Amp
> to drive Tesla coil (fwd) > > >---------- Forwarded message ----------
>> Date: Tue, 11 Sep 2007 10:11:36 EDT >From: FIFTYGUY@xxxxxxx >To:
> tesla@xxxxxxxxxx >Subject: Re: 4000 watt Audio Amp to drive Tesla coil
> (fwd) >
>>
>> In a message dated 9/11/07 9:31:15 A.M. Eastern Daylight Time,  
>> tesla@xxxxxxxxxx writes:
>>
>>>   Soooooooo, how and where in the world do I get a  source of 200 constant 
>> amps at 13.8 volts? This >is not your average power  supply you can plug into 
>> a wall.
>>
>>    Depends on your plug.
>>
>>    If you plug it into a 30A 220V single-phase dryer  receptacle, 4kW should 
>> be no problem.
>>
>>    You can use a "buck/boost" transformer in an  isolating configuration 
>> (added bonus!) to get low voltage/high current AC, then  rectify. Big diodes are 
>> relatively cheap. You could use phase-controlled SCRs to  help regulate the 
>> average voltage, but it makes a brutal mess of an output  waveform when you need 
>> *clean* DC. This is what we've done to make 12V DC at  1500 amps for 
>> electrolysis cells. 
>>    Filtering will depend on your needs. Maybe you can  wind your own big 
>> choke on some scrap iron to save on filter cap expenses, as  you'd be looking at 
>> a lot of very big, very robust caps. But suitable choke  design is 
>> *non-trivial*.
>>    The MG set approach would be fine, using multiple  car alternators, but 
>> the problem is finding a 5 or 7-1/2 HP *single-phase*  motor. 
>>    In this kind of application, polyphase AC is your  friend. Maybe run a 5 
>> HP 3-phase motor as a rotary phase convertor, then use it  to drive the car 
>> alternators? You might be able to rectify directly from  the  other two motor 
>> legs (probably the cheapest and simplest approach,  worth a shot to try first?). 
>> You might be able to scrounge up an old 5 or 10 HP  3-phase motor that has a 
>> broken or irreparable shaft for cheap (scrap metal). 
>>
>>
>> -Phil LaBudde
>> Center for the Advanced Study of Ballistic  Improbabilities
>>
>>
>>
>> ************************************** See what's new at http://www.aol.com
>>
>>
> 
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> 
> 
>