> >>> >>On 11/10/2018 11:39 PM, guitar-lead@myband.com wrote:> >>> >>> Need schematic for a 100 megawatt audio amplifier using vacuum > >>> >>> tubes.Got it! Finally a commercially viable solution. Take a pocket radio & relabel it 100MW PMPO. If you rearrange all the atoms in the 9v battery & power capacitor, lob it into the temperature of the sun & you should get that 100MW. So it's a justifiable claim. Better glue a small valve into a convenient gap somewhere. Or just find a radio that's tube shaped. NT
Need schematic for a 100 megawatt audio amplifier
Started by ●November 11, 2018
Reply by ●November 15, 20182018-11-15
Reply by ●November 15, 20182018-11-15
upsidedown@downunder.com wrote in news:sm9pudt7fngb5efg63pmtl0ldnpr8krn0b@ 4ax.com:> > ENIAC was originally just a manually reprogrammable calculator, only > much later it was capable of execute stored programs. >That "MANUAL program" was for calculating artillery trajectories.
Reply by ●November 15, 20182018-11-15
On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr@gmail.com wrote:>On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: >> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: >> >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. >> >> There are some thousands-of-PSI multi-horsepower hydraulic servo >> valves that get into the hundreds of Hz. Hydraulic bass drivers? > >hydraulics are just control & gearing, but it's a way to use a cheap high power drive, the compressor. > >> I'm always impressed by big hydraulics. They move mountains, usually >> with reversed mechanical advantage. But my knees work with reversed >> mechanical advantage; if I lift a hundred pounds, my muscles must be >> pulling tons. >> >> I wonder why so many guys fanticize about being rock stars. Sounds >> dreadful to me. > >Sounds great to people with no other opportunities. Not stuck in an office all day, saying yes sir yes sir for a bit above minimum wage. Most buy into the money wasted on superficial junk thing. I prefer to do something useful. > > >NTThe fraction of people with enough musical talent to be stars is in the parts-per-million. What's the SPL where air goes nonlinear, where the negative peaks hit vacuum? That 100 megawatts wouldn't work on any rock-concert soundstage. -- John Larkin Highland Technology, Inc lunatic fringe electronics
Reply by ●November 15, 20182018-11-15
John Larkin <jjlarkin@highlandtechnology.com> wrote in news:p34rudtt20od5stvddvqdb0kbfm97m3a9n@4ax.com:> On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr@gmail.com wrote: > >>On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: >>> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: >>> >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. >>> >>> There are some thousands-of-PSI multi-horsepower hydraulic servo >>> valves that get into the hundreds of Hz. Hydraulic bass drivers? >> >>hydraulics are just control & gearing, but it's a way to use a cheap >>high power drive, the compressor. >> >>> I'm always impressed by big hydraulics. They move mountains, usually >>> with reversed mechanical advantage. But my knees work with reversed >>> mechanical advantage; if I lift a hundred pounds, my muscles must be >>> pulling tons. >>> >>> I wonder why so many guys fanticize about being rock stars. Sounds >>> dreadful to me. >> >>Sounds great to people with no other opportunities. Not stuck in an >>office all day, saying yes sir yes sir for a bit above minimum wage. >>Most buy into the money wasted on superficial junk thing. I prefer to >>do something useful. >> >> >>NT > > The fraction of people with enough musical talent to be stars is in > the parts-per-million. > > What's the SPL where air goes nonlinear, where the negative peaks hit > vacuum? That 100 megawatts wouldn't work on any rock-concert > soundstage. > >The word for today is "slew rate". And building a mechanical transducer to reproduce sound with these pressure levels is immpossible with our current material science.
Reply by ●November 15, 20182018-11-15
On 11/15/18 10:31 AM, John Larkin wrote:> On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr@gmail.com wrote: > >> On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: >>> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: >>>> 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. >>> >>> There are some thousands-of-PSI multi-horsepower hydraulic servo >>> valves that get into the hundreds of Hz. Hydraulic bass drivers? >> >> hydraulics are just control & gearing, but it's a way to use a cheap high power drive, the compressor. >> >>> I'm always impressed by big hydraulics. They move mountains, usually >>> with reversed mechanical advantage. But my knees work with reversed >>> mechanical advantage; if I lift a hundred pounds, my muscles must be >>> pulling tons. >>> >>> I wonder why so many guys fanticize about being rock stars. Sounds >>> dreadful to me. >> >> Sounds great to people with no other opportunities. Not stuck in an office all day, saying yes sir yes sir for a bit above minimum wage. Most buy into the money wasted on superficial junk thing. I prefer to do something useful. >> >> >> NT > > The fraction of people with enough musical talent to be stars is in > the parts-per-million. > > What's the SPL where air goes nonlinear, where the negative peaks hit > vacuum? That 100 megawatts wouldn't work on any rock-concert > soundstage.Air goes nonlinear way before you get there. Sound is basically adiabatic, so near the positive pressure peaks the air is hotter and the speed of sound correspondingly faster. Thus the positive peaks get steeper and steeper as the wave propagates. Doesn't take long to build up shock waves, or very nearly. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
Reply by ●November 15, 20182018-11-15
On Thursday, 15 November 2018 15:31:29 UTC, John Larkin wrote:> On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr wrote: > >On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: > >> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: > >> >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. > >> > >> There are some thousands-of-PSI multi-horsepower hydraulic servo > >> valves that get into the hundreds of Hz. Hydraulic bass drivers? > > > >hydraulics are just control & gearing, but it's a way to use a cheap high power drive, the compressor. > > > >> I'm always impressed by big hydraulics. They move mountains, usually > >> with reversed mechanical advantage. But my knees work with reversed > >> mechanical advantage; if I lift a hundred pounds, my muscles must be > >> pulling tons. > >> > >> I wonder why so many guys fanticize about being rock stars. Sounds > >> dreadful to me. > > > >Sounds great to people with no other opportunities. Not stuck in an office all day, saying yes sir yes sir for a bit above minimum wage. Most buy into the money wasted on superficial junk thing. I prefer to do something useful. > > > > > >NT > > The fraction of people with enough musical talent to be stars is in > the parts-per-million.1ppm is 300 people per America, 65 per UK. Certainly there's a huge mismatch between demand & self-assessed supply. For those that want it it's a dream.> What's the SPL where air goes nonlinear, where the negative peaks hit > vacuum? That 100 megawatts wouldn't work on any rock-concert > soundstage.where 'work' includes the audience surviving, no, regardless of anything else. P_diss alone would cook them before the band started playing. NT
Reply by ●November 15, 20182018-11-15
On Sun, 11 Nov 2018 23:35:55 -0800, Jeff Liebermann <jeffl@cruzio.com> wrote:>There might be a PCB in the low >level part of the amplifier, but stages operating at over 1000 watts >need big fat conductors, physically large capacitors, heavy duty >transformers, oil bath capacitors, and high current knife switches.Really? The last induction heater I designed before I retired is rated at 5kW. Everything is on a 4oz, 4 layer board. My IR camera shows about 25 deg C rise at full power. My PFC/boost universal boost controller boosts incoming line to 385 volts. 5kW is only about 13 amps. The current in the tank runs around 80 amps at 80kHz. I have a 10kW unit on my bench that I will test after the Thanksgiving holiday. Same board and SiC FETs. There are two differences. One is the resonating capacitor is split into 2 smaller capacitance units. The second is that I've applied vertical bus bars on the power traces. John John DeArmond http://www.neon-john.com http://www.tnduction.com Tellico Plains, Occupied TN See website for email address
Reply by ●November 15, 20182018-11-15
On Thu, 15 Nov 2018 10:44:41 -0500, Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:>On 11/15/18 10:31 AM, John Larkin wrote: >> On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr@gmail.com wrote: >> >>> On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: >>>> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: >>>>> 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. >>>> >>>> There are some thousands-of-PSI multi-horsepower hydraulic servo >>>> valves that get into the hundreds of Hz. Hydraulic bass drivers? >>> >>> hydraulics are just control & gearing, but it's a way to use a cheap high power drive, the compressor. >>> >>>> I'm always impressed by big hydraulics. They move mountains, usually >>>> with reversed mechanical advantage. But my knees work with reversed >>>> mechanical advantage; if I lift a hundred pounds, my muscles must be >>>> pulling tons. >>>> >>>> I wonder why so many guys fanticize about being rock stars. Sounds >>>> dreadful to me. >>> >>> Sounds great to people with no other opportunities. Not stuck in an office all day, saying yes sir yes sir for a bit above minimum wage. Most buy into the money wasted on superficial junk thing. I prefer to do something useful. >>> >>> >>> NT >> >> The fraction of people with enough musical talent to be stars is in >> the parts-per-million. >> >> What's the SPL where air goes nonlinear, where the negative peaks hit >> vacuum? That 100 megawatts wouldn't work on any rock-concert >> soundstage. > >Air goes nonlinear way before you get there. Sound is basically >adiabatic, so near the positive pressure peaks the air is hotter and the >speed of sound correspondingly faster. Thus the positive peaks get >steeper and steeper as the wave propagates. Doesn't take long to build >up shock waves, or very nearly. > >Cheers > >Phil HobbsSounds like a shock line, NLTL. Fast samplers use them. Superheated shock waves would impress the crowd at the concert. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●November 15, 20182018-11-15
On Thu, 15 Nov 2018 12:25:21 -0500, Neon John <no@never.com> wrote:>On Sun, 11 Nov 2018 23:35:55 -0800, Jeff Liebermann <jeffl@cruzio.com> >wrote: > >>There might be a PCB in the low >>level part of the amplifier, but stages operating at over 1000 watts >>need big fat conductors, physically large capacitors, heavy duty >>transformers, oil bath capacitors, and high current knife switches. > >Really? The last induction heater I designed before I retired is >rated at 5kW. Everything is on a 4oz, 4 layer board. My IR camera >shows about 25 deg C rise at full power. My PFC/boost universal boost >controller boosts incoming line to 385 volts. 5kW is only about 13 >amps. The current in the tank runs around 80 amps at 80kHz. > >I have a 10kW unit on my bench that I will test after the Thanksgiving >holiday. Same board and SiC FETs. There are two differences. One is >the resonating capacitor is split into 2 smaller capacitance units. >The second is that I've applied vertical bus bars on the power traces. > >John > >The OP can maybe live with peak music power, or Chinese watts, which is easier to manage on PC boards. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Reply by ●November 15, 20182018-11-15
On 11/15/18 2:44 PM, John Larkin wrote:> On Thu, 15 Nov 2018 10:44:41 -0500, Phil Hobbs > <pcdhSpamMeSenseless@electrooptical.net> wrote: > >> On 11/15/18 10:31 AM, John Larkin wrote: >>> On Wed, 14 Nov 2018 23:14:59 -0800 (PST), tabbypurr@gmail.com wrote: >>> >>>> On Wednesday, 14 November 2018 21:04:51 UTC, John Larkin wrote: >>>>> On Sun, 11 Nov 2018 10:51:34 -0800 (PST), tabbypurr wrote: >>>>>> 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. >>>>> >>>>> There are some thousands-of-PSI multi-horsepower hydraulic servo >>>>> valves that get into the hundreds of Hz. Hydraulic bass drivers? >>>> >>>> hydraulics are just control & gearing, but it's a way to use a cheap high power drive, the compressor. >>>> >>>>> I'm always impressed by big hydraulics. They move mountains, usually >>>>> with reversed mechanical advantage. But my knees work with reversed >>>>> mechanical advantage; if I lift a hundred pounds, my muscles must be >>>>> pulling tons. >>>>> >>>>> I wonder why so many guys fanticize about being rock stars. Sounds >>>>> dreadful to me. >>>> >>>> Sounds great to people with no other opportunities. Not stuck in an office all day, saying yes sir yes sir for a bit above minimum wage. Most buy into the money wasted on superficial junk thing. I prefer to do something useful. >>>> >>>> >>>> NT >>> >>> The fraction of people with enough musical talent to be stars is in >>> the parts-per-million. >>> >>> What's the SPL where air goes nonlinear, where the negative peaks hit >>> vacuum? That 100 megawatts wouldn't work on any rock-concert >>> soundstage. >> >> Air goes nonlinear way before you get there. Sound is basically >> adiabatic, so near the positive pressure peaks the air is hotter and the >> speed of sound correspondingly faster. Thus the positive peaks get >> steeper and steeper as the wave propagates. Doesn't take long to build >> up shock waves, or very nearly. >> >> Cheers >> >> Phil Hobbs > > Sounds like a shock line, NLTL. Fast samplers use them.Same idea, yeah.> > Superheated shock waves would impress the crowd at the concert.The first one would blow out their ear drums, at which point they'd have other things on their minds besides music, like whether it would also homogenize their internal organs. The kids dancing in front of the speaker stacks would have a poor prognosis. Cheers Phil Hobbs (Who used to stand down in the mosh pits of prog rock concerts in the mid-70s wearing ear plugs and taking photos. He still has several hundred slides to prove it, not that he wants to.) :) -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
