On Saturday 23 May 2009, John Doty wrote:
>On May 23, 2009, at 7:56 PM, Gene Heskett wrote:
>> To me, a 6AU6 is a newer
>> tube. 6SJ/K7's are middle aged, and the 4X's were popular for
>> small signal &
>> 2A3's for audio output's about the time I was born. And all are
>> transconductance pikers
On May 23, 2009, at 7:56 PM, Gene Heskett wrote:
> To me, a 6AU6 is a newer
> tube. 6SJ/K7's are middle aged, and the 4X's were popular for
> small signal &
> 2A3's for audio output's about the time I was born. And all are
> transconductance pikers compared to a 7788. :) And my spell
> che
On Saturday 23 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Friday 22 May 2009, Joerg wrote:
>>> I'll second that. Did it in Spain but the track owner from whom I also
>>> rented the go-kart didn't want me on there anymore after my power-slides
>>> blew out the 2nd tire (including some smoke p
On Saturday 23 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Friday 22 May 2009, Joerg wrote:
>>> John Doty wrote:
On May 21, 2009, at 6:00 PM, Joerg wrote:
> Chris Albertson wrote:
>
> [...]
>
>> I'm thinking about tube amps that had an output impedance of about 1M
>>>
Gene Heskett wrote:
> On Friday 22 May 2009, Joerg wrote:
>
>> I'll second that. Did it in Spain but the track owner from whom I also
>> rented the go-kart didn't want me on there anymore after my power-slides
>> blew out the 2nd tire (including some smoke plumes). They must be rather
>> expensive
Gene Heskett wrote:
> On Friday 22 May 2009, Joerg wrote:
>> John Doty wrote:
>>> On May 21, 2009, at 6:00 PM, Joerg wrote:
Chris Albertson wrote:
[...]
> I'm thinking about tube amps that had an output impedance of about 1M
> ohm that used transformers to drive 8 ohm sp
I have not made it to Akihabara, but if you are around the Nagoya area
you can try Osu it has the same kind of stuff. I always have to plan
for a side trip and a little extra spending money.
On Fri, May 22, 2009 at 2:49 PM, John Doty <[1]...@noqsi.com> wrote:
On May 22, 2009, at
On Friday 22 May 2009, Joerg wrote:
>I'll second that. Did it in Spain but the track owner from whom I also
>rented the go-kart didn't want me on there anymore after my power-slides
>blew out the 2nd tire (including some smoke plumes). They must be rather
>expensive.
40 years ago, those slicks we
On Friday 22 May 2009, Joerg wrote:
>John Doty wrote:
>> On May 21, 2009, at 6:00 PM, Joerg wrote:
>>> Chris Albertson wrote:
>>>
>>> [...]
>>>
I'm thinking about tube amps that had an output impedance of about 1M
ohm that used transformers to drive 8 ohm speakers. About a 100,000
t
On May 22, 2009, at 12:35 PM, Joerg wrote:
>
>> In Japan, Tokyu Hands (a division of the Tokyu department store
>> chain) sells tube amplifier kits.
>>
>
> The dream of any electronics engineer, one whole day for an extended
> stroll through Akihabara,
Hai, shimashita. Been there, done that. But
John Doty wrote:
> On May 22, 2009, at 10:47 AM, Joerg wrote:
>
>> As for tubes I found that HV-driver tubes for color TVs were the best
>> deal. But this was decades ago, today you'd have to take a look at
>> which
>> current production tubes are available and at what cost. Sovtek,
>> Svetlana
On May 22, 2009, at 10:47 AM, Joerg wrote:
> As for tubes I found that HV-driver tubes for color TVs were the best
> deal. But this was decades ago, today you'd have to take a look at
> which
> current production tubes are available and at what cost. Sovtek,
> Svetlana and so on.
Still lots of
Gene Heskett wrote:
> On Thursday 21 May 2009, Joerg wrote:
> [...]
>> Wow, I've never been in a close call like that one. Only once in a small
>> Dornier aircraft when the (otherwise totally quiet) bush pilot kind of
>> guy let off a lot of cuss words, the stall horn was blaring, pine tree
>> tops
Chris Albertson wrote:
> On Thu, May 21, 2009 at 5:00 PM, Joerg wrote:
>> Chris Albertson wrote:
>>
>> [...]
>>
>>> I'm thinking about tube amps that had an output impedance of about 1M
>>> ohm that used transformers to drive 8 ohm speakers. About a 100,000
>>> to 1 ratio.
>>>
>> 1M? What kind of
On Thu, May 21, 2009 at 5:00 PM, Joerg wrote:
> Chris Albertson wrote:
>
> [...]
>
>> I'm thinking about tube amps that had an output impedance of about 1M
>> ohm that used transformers to drive 8 ohm speakers. About a 100,000
>> to 1 ratio.
>>
>
> 1M? What kind of tube was that? I think the high
John Doty wrote:
> On May 21, 2009, at 6:00 PM, Joerg wrote:
>
>> Chris Albertson wrote:
>>
>> [...]
>>
>>> I'm thinking about tube amps that had an output impedance of about 1M
>>> ohm that used transformers to drive 8 ohm speakers. About a 100,000
>>> to 1 ratio.
>>>
>> 1M? What kind of tube wa
John Doty wrote:
> And finally, the real issue here is the current required. 100 amps
> will melt the wire in any audio transformer I've ever seen.
>
> Everybody seems to think Mark's soldering gun suggestion is a joke,
> but I don't know. I think I'd get one, pull the transformer, measure
On Thursday 21 May 2009, Joerg wrote:
[...]
>Wow, I've never been in a close call like that one. Only once in a small
>Dornier aircraft when the (otherwise totally quiet) bush pilot kind of
>guy let off a lot of cuss words, the stall horn was blaring, pine tree
>tops came at us and it was of course
On Thursday 21 May 2009, John Doty wrote:
> Everybody seems to think Mark's soldering gun suggestion is a
> joke, but I don't know. I think I'd get one, pull the
> transformer, measure its characteristics,
Maybe someone has a broken one laying around. I recall those
plastic (Bakelite??) housin
On May 21, 2009, at 6:00 PM, Joerg wrote:
> Chris Albertson wrote:
>
> [...]
>
>> I'm thinking about tube amps that had an output impedance of about 1M
>> ohm that used transformers to drive 8 ohm speakers. About a 100,000
>> to 1 ratio.
>>
>
> 1M? What kind of tube was that?
Well, that's a typ
Chris Albertson wrote:
[...]
> I'm thinking about tube amps that had an output impedance of about 1M
> ohm that used transformers to drive 8 ohm speakers. About a 100,000
> to 1 ratio.
>
1M? What kind of tube was that? I think the highest I had was about 5K.
At 5000 volts on the plates ...
T
On Wed, May 20, 2009 at 8:37 AM, Levente Kovacs wrote:
> Ok,
>
>
> I guess I wasn't clear, so I have to add that it won't be used to drive a
> speaker, I used the word "audio" to refer the frequency range. 500W audio
> amplifier that designed to drive 4-8 Ohms is easy. But 100A, is something you
>
>> [...] I'm having trouble seeing the error.
> [...various people...]
Ah, yes, if you compute the number of pounds you have and then think -
or inadvertently tell your aircraft - that number is how many kilograms
you have...yes, I can see the problem now. It's not clear from the
article whether
Gene Heskett wrote:
> On Thursday 21 May 2009, Joerg wrote:
>> der Mouse wrote:
Or it produces nailbiters like this one:
http://www.wadenelson.com/gimli.html
>>> It's a very interesting story, to be sure, but I'm having trouble
>>> seeing the error. It says
>>>
>>> [...] each ti
On Thursday 21 May 2009, Joerg wrote:
>der Mouse wrote:
>>> Or it produces nailbiters like this one:
>>>
>>> http://www.wadenelson.com/gimli.html
>>
>> It's a very interesting story, to be sure, but I'm having trouble
>> seeing the error. It says
>>
>> [...] each time using 1.77 pounds/liter
der Mouse wrote:
>> Or it produces nailbiters like this one:
>
>> http://www.wadenelson.com/gimli.html
>
> It's a very interesting story, to be sure, but I'm having trouble
> seeing the error. It says
>
> [...] each time using 1.77 pounds/liter as the specific gravity
> factor. [..
> It's a very interesting story, to be sure, but I'm having trouble
> seeing the error.
The error was in using 1.77 kg/liter. Keep track of your units!
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo/g
> Or it produces nailbiters like this one:
> http://www.wadenelson.com/gimli.html
It's a very interesting story, to be sure, but I'm having trouble
seeing the error. It says
[...] each time using 1.77 pounds/liter as the specific gravity
factor. [...] The factor the refuelers
On Thursday 21 May 2009, Joerg wrote:
>Gene Heskett wrote:
[...]
>>> But I can't really bleed off freon. Plus AFAIK they don't sell that
>>> stuff to ordinary folk anymore unless you have a contractor's license. I
>>> mean, I could get one, but that would go a bit far ;-)
>>
>> Its no better on thi
On Thursday 21 May 2009, DJ Delorie wrote:
>> I'd kill 2 birds then, and grab a lawn chair and a beer, and sit
>> beside it while its running long enough to run out of beer. :)
>
>Or just ask Pat to listen for it. She sits out there a lot - the A/C
>is next to the screen porch.
>
Chuckle, passing
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> Gene Heskett wrote:
>>> On Wednesday 20 May 2009, Joerg wrote:
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> DJ Delorie wrote:
>>> Levente Kovacs writes:
230V times 100A is something I dont
John Doty wrote:
> On May 20, 2009, at 6:05 PM, Joerg wrote:
>
>> John Doty wrote:
>>> On May 20, 2009, at 2:36 PM, der Mouse wrote:
>>>
>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>> one ton of water, per hour.
>>> Why do engineers use so many whacky units?
>>
> I'd kill 2 birds then, and grab a lawn chair and a beer, and sit
> beside it while its running long enough to run out of beer. :)
Or just ask Pat to listen for it. She sits out there a lot - the A/C
is next to the screen porch.
___
geda-user mailin
On Wednesday 20 May 2009, DJ Delorie wrote:
>> It is _your_ AC, right?
>
>Well yeah, but I don't want to fiddle with it *that* much. Besides, I
>don't know that they don't already do what you've suggested. IIRC the
>fan and compressor turn on separately, they might turn off separately
>too. I've
> It is _your_ AC, right?
Well yeah, but I don't want to fiddle with it *that* much. Besides, I
don't know that they don't already do what you've suggested. IIRC the
fan and compressor turn on separately, they might turn off separately
too. I've never paid that much attention to them.
__
On Wednesday 20 May 2009, DJ Delorie wrote:
>> Then put a time delay to off of at least 3 to 5 minutes into the
>> condensor fan circuit only,
>
>I don't have that kind of control over it. I have one low-voltage
>control loop to tell it on/off, and that's it.
It is _your_ AC, right? You have eve
On Wednesday 20 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Wednesday 20 May 2009, Joerg wrote:
>>> Gene Heskett wrote:
On Wednesday 20 May 2009, Joerg wrote:
> DJ Delorie wrote:
>> Levente Kovacs writes:
>>> 230V times 100A is something I dont want to even calculate.
>>
On May 20, 2009, at 6:05 PM, Joerg wrote:
> John Doty wrote:
>> On May 20, 2009, at 2:36 PM, der Mouse wrote:
>>
> A ton of cooling is 12 Kbtu, about the heat of crystallization of
> one ton of water, per hour.
>> Why do engineers use so many whacky units?
> [...], tradition and c
> Then put a time delay to off of at least 3 to 5 minutes into the
> condensor fan circuit only,
I don't have that kind of control over it. I have one low-voltage
control loop to tell it on/off, and that's it.
> By the same token, if the evaporator fan in the furnace is being
> stopped at the s
John Doty wrote:
> On May 20, 2009, at 2:36 PM, der Mouse wrote:
>
A ton of cooling is 12 Kbtu, about the heat of crystallization of
one ton of water, per hour.
> Why do engineers use so many whacky units?
[...], tradition and convenience.
>>> Good excuses for the masses. Not s
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> Gene Heskett wrote:
>>> On Wednesday 20 May 2009, Joerg wrote:
DJ Delorie wrote:
> Levente Kovacs writes:
>> 230V times 100A is something I dont want to even calculate.
> It's 23000 :-)
>
> My air conditioner
On Wednesday 20 May 2009, der Mouse wrote:
>>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>>> one ton of water, per hour.
>>>
Why do engineers use so many whacky units?
>>>
>>> [...], tradition and convenience.
>>
>> Good excuses for the masses. Not so good for engineer
On Wednesday 20 May 2009, Levente Kovacs wrote:
>We want to avoid transformers. The older version of this equippment had the
>good old Quad-405 power amplifiers, and transformers at the end. It is so
>heave, that one man can hardly lift the unit.
>
>Btw... the same unit must also provide a voltage
On Wednesday 20 May 2009, DJ Delorie wrote:
>> Not even a 40 horse compressor in a 22 ton (rated, yeah sure) Lennox
>> will draw that much for that long.
>
>Gee, you guys are making me feel bad. Now I have to go out and
>research air conditioners :-P
>
>Anyway, I know I have a 60 amp circuit for i
DJ Delorie wrote:
>> But if your computer and network gear uses anywhere close to half of
>> your grand total I think that stuff needs some "greenification"
>> attention. Even if it was 1/4 that's huge.
>
> Agreed, but keep in mind I work from home, so this is all high power
> equipment that get
> But if your computer and network gear uses anywhere close to half of
> your grand total I think that stuff needs some "greenification"
> attention. Even if it was 1/4 that's huge.
Agreed, but keep in mind I work from home, so this is all high power
equipment that gets used all day. Not a lot
On Wednesday 20 May 2009, Joerg wrote:
>Gene Heskett wrote:
>> On Wednesday 20 May 2009, Joerg wrote:
>>> DJ Delorie wrote:
Levente Kovacs writes:
> 230V times 100A is something I dont want to even calculate.
It's 23000 :-)
My air conditioner draws 123 amps at 240 volt
--Original Message-
>> From: geda-user-boun...@moria.seul.org
>> [mailto:geda-user-boun...@moria.seul.org] On Behalf Of Gene Heskett
>> Sent: Wednesday, May 20, 2009 3:12 PM
>> To: gEDA user mailing list
>> Subject: Re: gEDA-user: [OFF] high current amplifier
>
On May 20, 2009, at 2:36 PM, der Mouse wrote:
>>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>>> one ton of water, per hour.
Why do engineers use so many whacky units?
>>> [...], tradition and convenience.
>> Good excuses for the masses. Not so good for engineering, w
Gene Heskett wrote:
> On Wednesday 20 May 2009, Joerg wrote:
>> DJ Delorie wrote:
>>> Levente Kovacs writes:
230V times 100A is something I dont want to even calculate.
>>> It's 23000 :-)
>>>
>>> My air conditioner draws 123 amps at 240 volts for the first few
>>> seconds. That's almost 30kW
DJ Delorie wrote:
> DJ Delorie writes:
>> I think it's a 60 ton.
>
> Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
>
Ok, that sounds more reasonable. I thought you guys lived in a structure
similar to Hearst Castle.
But if your computer and network gear uses anywhere
Levente Kovacs wrote:
> On Wed, 20 May 2009 09:26:07 -0700
> Joerg
> wrote:
>
>> I'd wear eye protection :-)
>>
>> I can already picture it, on day a connection comes loose, we all
>> hear a muffled *BOOM* and see an orange glow over Budapest ...
>
> Well... I will do it in Budakalász. :-) But y
ul.org
> [mailto:geda-user-boun...@moria.seul.org] On Behalf Of Gene Heskett
> Sent: Wednesday, May 20, 2009 3:12 PM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: [OFF] high current amplifier
>
...
> Is this data obtained from a Kill-a-watt?
D
Hi Levente,
On Wed, 2009-05-20 at 22:02 +0200, Levente Kovacs wrote:
>
> We want to avoid transformers. The older version of this equippment had the
> good old Quad-405 power amplifiers, and transformers at the end. It is so
> heave, that one man can hardly lift the unit.
>
> Btw... the same uni
> You might as well ask why motor power is measured in horsepower -
> that's another historical unit that's cryptic and baffling to the
> uninitiated, but is perfectly good to those in the industry.
Bad example, though - motor horsepower is not a regulated measurement
like amps is, so marketing f
>> A ton of cooling is 12 Kbtu, about the heat of crystallization of
>> one ton of water, per hour.
>>> Why do engineers use so many whacky units?
>> [...], tradition and convenience.
> Good excuses for the masses. Not so good for engineering, which
> depends on precise communication.
Which measu
> Is this data obtained from a Kill-a-watt?
No, from the prototype powermeter board.
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
On Wednesday 20 May 2009, DJ Delorie wrote:
>> Seconds and not fractions or a second? Yikes! Unless it's a 10-15
>> ton unit that doesn't sound normal.
>
>I think it's a 60 ton. It draws 30 amps once it's running. Yeah,
>seconds, not fractions. They had to upgrade the transformer on the
>pole to
We want to avoid transformers. The older version of this equippment had the
good old Quad-405 power amplifiers, and transformers at the end. It is so
heave, that one man can hardly lift the unit.
Btw... the same unit must also provide a voltage output up to 300V, but only
100Watts. For that, we'
On May 20, 2009, at 1:31 PM, der Mouse wrote:
> ~5 tons, enough for a 3000 sq ft house.
And neither makes dimensional sense ;-)
>>> 1 ton refers to the equivalent cooling power as melting 1 ton of
>>> ice -
>> Still not dimensionally right. Need time in the denominator.
>
> Yes - "per
~5 tons, enough for a 3000 sq ft house.
>>> And neither makes dimensional sense ;-)
>> 1 ton refers to the equivalent cooling power as melting 1 ton of ice -
> Still not dimensionally right. Need time in the denominator.
Yes - "per hour". A ton of cooling is 12 Kbtu, about the heat of
cryst
> Not even a 40 horse compressor in a 22 ton (rated, yeah sure) Lennox
> will draw that much for that long.
Gee, you guys are making me feel bad. Now I have to go out and
research air conditioners :-P
Anyway, I know I have a 60 amp circuit for it, and it hits 123 amps
long enough for my DVM to
On May 20, 2009, at 1:10 PM, Ethan Swint wrote:
>
> I think it's a 60 ton.
Or it's a 60 kbtu, I don't recall - it's got "60" in the model
number
>>> 60 tons would be almost enough for a big-box store! 60kbtu sounds
>>> more
>>> like it, ~5 tons, enough for a 3000 sq ft house.
>>>
>
I think it's a 60 ton.
>>> Or it's a 60 kbtu, I don't recall - it's got "60" in the model
>>> number
>> 60 tons would be almost enough for a big-box store! 60kbtu sounds
>> more
>> like it, ~5 tons, enough for a 3000 sq ft house.
>>
>
> And neither makes dimensional sense ;-)
>
1
On Wednesday 20 May 2009, Joerg wrote:
>DJ Delorie wrote:
>> Levente Kovacs writes:
>>> 230V times 100A is something I dont want to even calculate.
>>
>> It's 23000 :-)
>>
>> My air conditioner draws 123 amps at 240 volts for the first few
>> seconds. That's almost 30kW.
>
>Seconds and not fracti
True... But I think they use tons once you reach about 1 ton of
cooling. (12000BTU/Hr)
Mark
> Most window air-conditioners I see in stores are rated in BTU's.
>
> D
>
___
geda-user mailing list
geda-user@moria.seul.org
http://www.s
> -Original Message-
> From: geda-user-boun...@moria.seul.org
> [mailto:geda-user-boun...@moria.seul.org] On Behalf Of Mark
> Cianfaglione
> Sent: Wednesday, May 20, 2009 2:12 PM
> To: gEDA user mailing list
> Subject: Re: gEDA-user: [OFF] high current amplifier
DJ
Knowing that you live in the North-East I'd say it's a 6.0 ton unit. A
60 Kbtu unit (btus are normally only for heating) would be too small
and a 60 ton would imply that you are running Antartic winter
simulations in your house in the summer... ;-)
Mark
geda-user-boun...@mo
On May 20, 2009, at 12:04 PM, Ethan Swint wrote:
>
> DJ Delorie wrote:
>> DJ Delorie writes:
>>
>>> I think it's a 60 ton.
>>>
>>
>> Or it's a 60 kbtu, I don't recall - it's got "60" in the model
>> number.
>>
> 60 tons would be almost enough for a big-box store! 60kbtu sounds
> more
> like
On Wed, 20 May 2009 09:26:07 -0700
Joerg
wrote:
> I'd wear eye protection :-)
>
> I can already picture it, on day a connection comes loose, we all
> hear a muffled *BOOM* and see an orange glow over Budapest ...
Well... I will do it in Budakalász. :-) But yes, I know it is a crazy toy! :-)
--
> 60 tons would be almost enough for a big-box store! 60kbtu sounds
> more like it, ~5 tons, enough for a 3000 sq ft house.
It's 4000 sq ft.
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
DJ Delorie wrote:
> DJ Delorie writes:
>
>> I think it's a 60 ton.
>>
>
> Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
>
60 tons would be almost enough for a big-box store! 60kbtu sounds more
like it, ~5 tons, enough for a 3000 sq ft house.
-Ethan
___
DJ Delorie writes:
> I think it's a 60 ton.
Or it's a 60 kbtu, I don't recall - it's got "60" in the model number.
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
> Seconds and not fractions or a second? Yikes! Unless it's a 10-15
> ton unit that doesn't sound normal.
I think it's a 60 ton. It draws 30 amps once it's running. Yeah,
seconds, not fractions. They had to upgrade the transformer on the
pole to supply enough juice.
> Did you find some of the
DJ Delorie wrote:
> Levente Kovacs writes:
>> 230V times 100A is something I dont want to even calculate.
>
> It's 23000 :-)
>
> My air conditioner draws 123 amps at 240 volts for the first few
> seconds. That's almost 30kW.
>
Seconds and not fractions or a second? Yikes! Unless it's a 10-15
On May 20, 2009, at 12:27 PM, Mark Rages wrote:
> You need a high-current, low-voltage transformer:
>
> http://www.cooperhandtools.com/brands/CF_Files/model_detail.cfm?
> upc=037103079480
ROFL!!
--
Dave McGuire
Port Charlotte, FL
___
geda-user m
John Doty wrote:
> On May 20, 2009, at 9:43 AM, Levente Kovacs wrote:
>
>> we want to test a current sensor with mains' frequency. However
>> there are
>> transient once in a while on the line, so we must simulate them too.
>
> Why not just use the mains, then? Step down volts to get current,
On May 20, 2009, at 9:43 AM, Levente Kovacs wrote:
> we want to test a current sensor with mains' frequency. However
> there are
> transient once in a while on the line, so we must simulate them too.
Why not just use the mains, then? Step down volts to get current,
make your transients by sw
On Wed, 2009-05-20 at 11:27 -0500, Mark Rages wrote:
> On Wed, May 20, 2009 at 11:16 AM, Levente Kovacs
> wrote:
> > On Wed, 20 May 2009 10:48:53 -0500
> > Mark Rages wrote:
> >
> >> What kind of transient are you trying to simulate? Maybe it would be
> >> easier to make a circuit to add the tr
On Wed, May 20, 2009 at 11:16 AM, Levente Kovacs wrote:
> On Wed, 20 May 2009 10:48:53 -0500
> Mark Rages wrote:
>
>> What kind of transient are you trying to simulate? Maybe it would be
>> easier to make a circuit to add the transient to mains power, instead
>> of recreating mains power with an
Levente Kovacs writes:
> 230V times 100A is something I dont want to even calculate.
It's 23000 :-)
My air conditioner draws 123 amps at 240 volts for the first few
seconds. That's almost 30kW.
___
geda-user mailing list
geda-user@moria.seul.org
ht
Levente Kovacs wrote:
> On Wed, 20 May 2009 11:45:55 -0400 (EDT)
> der Mouse
> wrote:
>
>> What _is_ this driving? Ten feet of #3 copper?
>
> A current sensor.
>
I'd wear eye protection :-)
I can already picture it, on day a connection comes loose, we all hear a
muffled *BOOM* and see an or
On Wednesday 20 May 2009, Steve Underwood wrote:
>Levente wrote:
>> Hi,
>>
>>
>> I have to design an audio amplifier that can deliver 100Amps. It should
>> work around 50Hz, and the maximum output power shall be 500W. I am
>> currently reading articles about this topic, but it is very hard to find
On Wed, 20 May 2009 10:48:53 -0500
Mark Rages wrote:
> What kind of transient are you trying to simulate? Maybe it would be
> easier to make a circuit to add the transient to mains power, instead
> of recreating mains power with an amplifier.
230V times 100A is something I dont want to even cal
On Wed, 20 May 2009 11:45:55 -0400 (EDT)
der Mouse
wrote:
> What _is_ this driving? Ten feet of #3 copper?
A current sensor.
--
Levente Kovacs
http://logonex.eu
___
geda-user mailing list
geda-user@moria.seul.org
http://www.seul.org/cgi-bin/mailm
Levente Kovacs wrote:
> Ok,
>
>
> I guess I wasn't clear, so I have to add that it won't be used to drive a
> speaker, I used the word "audio" to refer the frequency range. 500W audio
> amplifier that designed to drive 4-8 Ohms is easy. But 100A, is something you
> won't get in a pro audio store.
> I guess I wasn't clear, so I have to add that it won't be used to
> drive a speaker, I used the word "audio" to refer the frequency
> range. 500W audio amplifier that designed to drive 4-8 Ohms is easy.
> But 100A, is something you won't get in a pro audio store.
100A 500W...5V...that's .05 ohm
On Wed, May 20, 2009 at 10:43 AM, Levente Kovacs
<[1]leventel...@gmail.com> wrote:
On Wed, 20 May 2009 10:33:30 -0500
Mark Rages <[2]markra...@gmail.com> wrote:
> 100 amps and 500 watts implies a load impedance of 0.05 ohms. Some
> professional audio amplifiers may handle this,
On Wed, 20 May 2009 10:33:30 -0500
Mark Rages wrote:
> 100 amps and 500 watts implies a load impedance of 0.05 ohms. Some
> professional audio amplifiers may handle this, but I think most will
> go into self-protect mode.
>
> Best bet might be a car amp:
> http://www.sonicelectronix.com/item_11
Ok,
I guess I wasn't clear, so I have to add that it won't be used to drive a
speaker, I used the word "audio" to refer the frequency range. 500W audio
amplifier that designed to drive 4-8 Ohms is easy. But 100A, is something you
won't get in a pro audio store. The coldamp design provides 25Amps.
On Wed, May 20, 2009 at 10:14 AM, Steve Underwood
<[1]ste...@coppice.org> wrote:
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It
should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently readin
On May 20, 2009, at 11:17 AM, John Griessen wrote:
>>I believe this is commonly referred to as a "Class D" amplifier.
>> It is basically a switching regulator with a loop response time that
>> is fast enough to handle audio frequencies.
>
> Sure. and he says to operate "around 50 Hz", which I
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently reading articles about this topic, but it is very hard to find
> things like this. If someone has some experience wi
Dave McGuire wrote:
>I believe this is commonly referred to as a "Class D" amplifier.
> It is basically a switching regulator with a loop response time that
> is fast enough to handle audio frequencies.
Sure. and he says to operate "around 50 Hz", which I take as 35 to 65 Hz...fog
hor
On May 20, 2009, at 10:33 AM, der Mouse wrote:
>>> I have to design an audio amplifier that can deliver 100Amps.
>>> [...50Hz...500W...]
>> [...sketch...]
>> This is the highest efficiency type of driver since [its] driving
>> transistors are never in active region -- always full on or off.
>> High
>> I have to design an audio amplifier that can deliver 100Amps.
>> [...50Hz...500W...]
> [...sketch...]
> This is the highest efficiency type of driver since [its] driving
> transistors are never in active region -- always full on or off.
> High efficiency is what you need to put out 500W.
It occ
Levente wrote:
> Hi,
>
>
> I have to design an audio amplifier that can deliver 100Amps. It should
> work around 50Hz, and the maximum output power shall be 500W. I am
> currently reading articles about this topic, but it is very hard to find
> things like this. If someone has some experience
Hi,
I have to design an audio amplifier that can deliver 100Amps. It should
work around 50Hz, and the maximum output power shall be 500W. I am
currently reading articles about this topic, but it is very hard to find
things like this. If someone has some experience with, or some
documentation
98 matches
Mail list logo
