Need schematic for a 100 megawatt audio amplifier

On Sat, 10 Nov 2018 22:39:37 -0600, guitar-lead@myband.com wrote:

>Need schematic for a 100 megawatt audio amplifier using vacuum tubes.
>

So the entire world can hear you banging away on a guitar?


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

On Sun, 11 Nov 2018 00:59:17 -0500, bitrex <user@example.net> wrote:

>On 11/10/2018 11:39 PM, guitar-lead@myband.com wrote:
>> Need schematic for a 100 megawatt audio amplifier using vacuum tubes.
>> 
>
>You might have to compromise a bit and run it class B though. I hope 
>that's alright. It'll sound okay in the cheap seats but true audiophiles 
>won't be impressed.

I'm thinking 10,000,000 6L6's.


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

On Sat, 10 Nov 2018 22:39:37 -0600, guitar-lead@myband.com wrote:

>Need schematic for a 100 megawatt audio amplifier using vacuum tubes.

No problem and no vacuum tubes required.  A few diesel train engines
driving air compressors feeding a big Wagnerian horn should do the
trick.  Modulation would be by pneumatic valve control, fluidics, or
hydraulic modulators.  The audio frequency spectrum would need to be
split into octave sub-bands, each with their own diesel train engine,
compressor, and narrow band modulator.  The lower frequencies will
require more air and larger engines.  The horn end of the puzzle was
previously discussed in this newsgroup:
<https://groups.google.com/d/msg/sci.electronics.design/p-AnyFkn2Wg/j1HoQ8_7DQAJ>
<https://groups.google.com/d/msg/sci.electronics.design/p-AnyFkn2Wg/CA881vEEDgAJ>

Back of envelope power requirements might be:
  100 mega-watts for 1 second = 100 mJ
  Diesel fuel contains 36 mJ of energy per liter.
  Diesel at $1/liter.
Assuming the amplifier is running class A, the best it can do is 50%
efficiency.  My guess the diesel train engine, air compressor, and
modulator might operate at about 1% efficiency.  Therefore, to operate
your amplifier of 1 second, it would require:
  100 mJ/sec / 36 mJ/liter / 0.5 / 0.01 
  = 556 liters/sec = 33,000 liters/minute
At about $1/liter retail price of diesel:
<https://www.globalpetrolprices.com/diesel_prices/>
your amplifier might burn about $33,000 USD for every minute of
operation.  

Perhaps it would be easier to audio modulate or power the amp with a
hurricane:
<http://www.aoml.noaa.gov/hrd/tcfaq/D7.html>
Looks like a commodity hurricane will produce 1.5*10^12 watts/day.  At
50% amp efficiency, 10,000 of your amplifiers that require 200*10^6
watts each could easily be run by hurricane power.  All you need is a
very big wind turbine, some advanced mega-engineering, and the GDP
(gross domestic product) for about a year to pay for it.

Also, good luck finding a location where you can safely test your
amplifier.


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

On Sun, 11 Nov 2018 07:50:41 -0800, doh wrote:

>  I don't think the neighbors would be impressed, either.

There won't be any neighbours.



-- 
This message may be freely reproduced without limit or charge only via 
the Usenet protocol. Reproduction in whole or part through other 
protocols, whether for profit or not, is conditional upon a charge of 
GBP10.00 per reproduction. Publication in this manner via non-Usenet 
protocols constitutes acceptance of this condition.

On Sunday, 11 November 2018 04:39:41 UTC, guita...@myband.com  wrote:

> Need schematic for a 100 megawatt audio amplifier using vacuum tubes.

Mount the control rods on large long throw speaker coils, use the valve amp to drive those. No, won't work, steam doesn't have much frequency response. Maybe use the generators of a nuke plant in amplidyne mode. You'd need to make some custom ones to cover the higher frequencies if this is for audio - I hope it's not.

For speakers, air horns work but they're hissy. The hiss was a real problem with early powered gramophones. I'd think at 1MW it would be intolerable.

Plasma works but IIRC the efficiency is terrible. Maybe you could build a clingfilm factory & make an electrostatic speaker that floats over the nation's powerlines. Or maybe you could use lots of little explosive charges in class D mode - that way you get lots of additional amplification in the speakers, since a megawatt is barely sufficient.

Or you could do a conventional valve amp after buying ebay & misappropriating every valve, transformer and so on on there over a 5 year period. You'd need some ruse as to why sellers have posted their valves but won't get compensated for 5 years. Maybe introduce a new payment protection scheme that requires a vast number of ID checks, then joining a compensation queue that pays out at a dribble etc. Keep reminding them it's late or never. Add a central warehouse stocking system that automatically 'disposes' of the goods after 6 months of no sale, won't return the goods, and find ways to mess with the bids.

Happy dictating.


NT

On 11.11.18 19:32, Jeff Liebermann wrote:
> On Sat, 10 Nov 2018 22:39:37 -0600, guitar-lead@myband.com wrote:
> 
>> Need schematic for a 100 megawatt audio amplifier using vacuum tubes.
> 
> No problem and no vacuum tubes required.  A few diesel train engines
> driving air compressors feeding a big Wagnerian horn should do the
> trick.  Modulation would be by pneumatic valve control, fluidics, or
> hydraulic modulators.  The audio frequency spectrum would need to be
> split into octave sub-bands, each with their own diesel train engine,
> compressor, and narrow band modulator.  The lower frequencies will
> require more air and larger engines.  The horn end of the puzzle was
> previously discussed in this newsgroup:
> <https://groups.google.com/d/msg/sci.electronics.design/p-AnyFkn2Wg/j1HoQ8_7DQAJ>
> <https://groups.google.com/d/msg/sci.electronics.design/p-AnyFkn2Wg/CA881vEEDgAJ>
> 
> Back of envelope power requirements might be:
>    100 mega-watts for 1 second = 100 mJ
>    Diesel fuel contains 36 mJ of energy per liter.
>    Diesel at $1/liter.
> Assuming the amplifier is running class A, the best it can do is 50%
> efficiency.  My guess the diesel train engine, air compressor, and
> modulator might operate at about 1% efficiency.  Therefore, to operate
> your amplifier of 1 second, it would require:
>    100 mJ/sec / 36 mJ/liter / 0.5 / 0.01
>    = 556 liters/sec = 33,000 liters/minute
> At about $1/liter retail price of diesel:
> <https://www.globalpetrolprices.com/diesel_prices/>
> your amplifier might burn about $33,000 USD for every minute of
> operation.
> 
> Perhaps it would be easier to audio modulate or power the amp with a
> hurricane:
> <http://www.aoml.noaa.gov/hrd/tcfaq/D7.html>
> Looks like a commodity hurricane will produce 1.5*10^12 watts/day.  At
> 50% amp efficiency, 10,000 of your amplifiers that require 200*10^6
> watts each could easily be run by hurricane power.  All you need is a
> very big wind turbine, some advanced mega-engineering, and the GDP
> (gross domestic product) for about a year to pay for it.
> 
> Also, good luck finding a location where you can safely test your
> amplifier.
> 
> 

Jeff,

There is some difference between 1 mJ and 1 MJ.

-- 

-TV

On Sun, 11 Nov 2018 21:11:56 +0200, Tauno Voipio
<tauno.voipio@notused.fi.invalid> wrote:


>> Back of envelope power requirements might be:
>>    100 mega-watts for 1 second = 100 mJ
>>    Diesel fuel contains 36 mJ of energy per liter.
>>    Diesel at $1/liter.
>> Assuming the amplifier is running class A, the best it can do is 50%
>> efficiency.  My guess the diesel train engine, air compressor, and
>> modulator might operate at about 1% efficiency.  Therefore, to operate
>> your amplifier of 1 second, it would require:
>>    100 mJ/sec / 36 mJ/liter / 0.5 / 0.01
>>    = 556 liters/sec = 33,000 liters/minute
>> At about $1/liter retail price of diesel:
>> <https://www.globalpetrolprices.com/diesel_prices/>
>> your amplifier might burn about $33,000 USD for every minute of
>> operation.

>Jeff,
>
>There is some difference between 1 mJ and 1 MJ.

Yep.  mY mistake.  I obtained the conversion factor from:
<https://deepresource.wordpress.com/2012/04/23/energy-related-conversion-factors/>
which uses: "mJ = mega-Joules"


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

Jeff Liebermann <jeffl@cruzio.com> wrote in
news:5c5hud5vbqqcjfadcfh9lkgm0v5hs1k1no@4ax.com: 

> On Sun, 11 Nov 2018 21:11:56 +0200, Tauno Voipio
> <tauno.voipio@notused.fi.invalid> wrote:
> 
> 
>>> Back of envelope power requirements might be:
>>>    100 mega-watts for 1 second = 100 mJ
>>>    Diesel fuel contains 36 mJ of energy per liter.
>>>    Diesel at $1/liter.
>>> Assuming the amplifier is running class A, the best it can do is 50%
>>> efficiency.  My guess the diesel train engine, air compressor, and
>>> modulator might operate at about 1% efficiency.  Therefore, to
>>> operate your amplifier of 1 second, it would require:
>>>    100 mJ/sec / 36 mJ/liter / 0.5 / 0.01
>>>    = 556 liters/sec = 33,000 liters/minute
>>> At about $1/liter retail price of diesel:
>>> <https://www.globalpetrolprices.com/diesel_prices/>
>>> your amplifier might burn about $33,000 USD for every minute of
>>> operation.
> 
>>Jeff,
>>
>>There is some difference between 1 mJ and 1 MJ.
> 
> Yep.  mY mistake.  I obtained the conversion factor from:
> <https://deepresource.wordpress.com/2012/04/23/energy-related-
conversio
> n-factors/> which uses: "mJ = mega-Joules"
> 
> 

  Probably with the logic of "who uses millijoules?"

  I mean...  I know the measure exists.

  How much energy do the little two inch pads they use for open heart 
surgery defib?

  It is easily an order of magnitude less than the externally applied 
defib.  Those hit you with anywhere from 100 to 400 joules in a pop.

  The little guys must just do a few joules each pulse.

On Sun, 11 Nov 2018 21:17:18 +0000 (UTC),
DecadentLinuxUserNumeroUno@decadence.org wrote:

>  How much energy do the little two inch pads they use for open heart 
>surgery defib?
>
>  It is easily an order of magnitude less than the externally applied 
>defib.  Those hit you with anywhere from 100 to 400 joules in a pop.
>
>  The little guys must just do a few joules each pulse.

Yep:
"Open chest defibrillation during cardiac surgery: Energy and current
requirements"
<https://www.ajconline.org/article/0002-9149(80)90006-5/pdf>

Looks like there's a choice of 5, 10, or 20 Joules to restart the
heart with some repetition.  I had a triple bypass done in 2002.  I
remember the 10 Joules figure, but I'm not sure how many times I was
zapped.  I think it was 3 times with the surgeon later mentioning that
he was worried.  I suspect that the difficulty getting my heart kick
started might be responsible for my inability to properly abbrev.


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

On Sun, 11 Nov 2018 15:38:39 -0800, Jeff Liebermann wrote:

> I suspect that the difficulty getting my heart kick started
> might be responsible for my inability to properly abbrev.

Did it also leave you with a life-long stutter?
;)


-- 
This message may be freely reproduced without limit or charge only via 
the Usenet protocol. Reproduction in whole or part through other 
protocols, whether for profit or not, is conditional upon a charge of 
GBP10.00 per reproduction. Publication in this manner via non-Usenet 
protocols constitutes acceptance of this condition.