thanks ,fotios.
I replaced all the old schema's with ones that say "update"
It is final, works bery good . No noise, no "thump"
and is VERY loud.
(slew at 40v/us, but no 5v input)
frugal 2 will be done soon, with 100+ v/uS or better.
(balanced diff. VAS)
OS
I replaced all the old schema's with ones that say "update"
It is final, works bery good . No noise, no "thump"
and is VERY loud.
(slew at 40v/us, but no 5v input)
frugal 2 will be done soon, with 100+ v/uS or better.
(balanced diff. VAS)
OS
OS sorry for my mistake, but i am under moderation and i can't edit my posts:
"Without load, with a square wave of 5Vpp in input, how much is the output rise time in 10KHz and in 20KHz?"
I meant: Without load, with a square wave of 10KHz and 20KHz in input, how much is the corresponding rise time in output at 5Vpp?
Of course 5V it is very high for input! 😀
From the slew you reffer you must have about 1,6 to 1,7 ìsec rise time. The same i have and me in my amplifier.
Indeed, with double LTPs in input you must have the half rise time (thus the double slew rate).
Regs
Fotios
You have to use one Image Editor program.
To make them less than 1000x1000 pixels and less than 100 kB file size .
I use XnView freeware. Has got Image Resize function.
http://pagesperso-orange.fr/pierre.g/xnview/endownloadwin32.html
And when I save JPG image I can select reduced quality of the copy saved:
... from 0% - 100% JPG image quality.
Usually 60-70% quality gives a small enough file. Compressed in format.
To make them less than 1000x1000 pixels and less than 100 kB file size .
I use XnView freeware. Has got Image Resize function.
http://pagesperso-orange.fr/pierre.g/xnview/endownloadwin32.html
And when I save JPG image I can select reduced quality of the copy saved:
... from 0% - 100% JPG image quality.
Usually 60-70% quality gives a small enough file. Compressed in format.
Attachments
In use:
That's Marcus Miller and Eric Clapton's jazz band, Live at Montreux 1987 (a great album).
The Grandfather's old windup Edison, left. The Amp drives two Magnapan MG-1.6, signal conditioned by Bottlehead tube pre-amp ... Yes, I did straighten the picture after this was taken.
That's Marcus Miller and Eric Clapton's jazz band, Live at Montreux 1987 (a great album).
The Grandfather's old windup Edison, left. The Amp drives two Magnapan MG-1.6, signal conditioned by Bottlehead tube pre-amp ... Yes, I did straighten the picture after this was taken.
Attachments
Very nice FastEddy. Those Aussie amp modules sure look good I must say.
Tip: Use a big washer or better still for DIY a piece of PCB between your mosfets and the wing nuts or mounting screw. This will spread the force on the package and prevent die crack inside the package.
I know well of what I speak - you would never guess the number of customer complaints I've seen because of cracked power device due due to excessive mounting torque or lack of a spreader of some sort .
Tip: Use a big washer or better still for DIY a piece of PCB between your mosfets and the wing nuts or mounting screw. This will spread the force on the package and prevent die crack inside the package.
I know well of what I speak - you would never guess the number of customer complaints I've seen because of cracked power device due due to excessive mounting torque or lack of a spreader of some sort .
" ... Use a big washer or better still for DIY a piece of PCB between your mosfets and the wing nuts or mounting screw. ..."
Now that's a good idea!! Thanks.
Now that's a good idea!! Thanks.
MY Darlington transistor 300W Amp
This is Darlington transistor 300W amp original from a tukish book . But after few changing. it workes at 300w and power my subwoofer.
Have a look
http://img247.imageshack.us/img247/4451/copyof113kv7.png
http://img247.imageshack.us/img247/4827/img0366my7.jpg
http://img110.imageshack.us/img110/7640/img0367qd5.jpg
http://img123.imageshack.us/img123/4397/img0368xa5.jpg
This is Darlington transistor 300W amp original from a tukish book . But after few changing. it workes at 300w and power my subwoofer.
Have a look
http://img247.imageshack.us/img247/4451/copyof113kv7.png
http://img247.imageshack.us/img247/4827/img0366my7.jpg
http://img110.imageshack.us/img110/7640/img0367qd5.jpg
http://img123.imageshack.us/img123/4397/img0368xa5.jpg
Nice work rakesh_sharma23. You must continue the good work by making a good case for your project... or you can put the amplifier in a place inside the subwoofer.
Regs
Fotios
Regs
Fotios
Axial: Roderstein KP1832. 0.43uF 200V polypropylene
RIFA: PHE 351 HE 715 250V
I found a whole bunch of these 1.5uF caps at an old PCB.
They look quality. But I am not sure what they are.
The value of 1.5uF would be good for some amplifier input.
Match: Swedish Safety Match for making fire.
First invented in 1844 by one of our swedish inventors.
RIFA: PHE 351 HE 715 250V
I found a whole bunch of these 1.5uF caps at an old PCB.
They look quality. But I am not sure what they are.
The value of 1.5uF would be good for some amplifier input.
Match: Swedish Safety Match for making fire.
First invented in 1844 by one of our swedish inventors.
Safety matches
Household safety matches, including one burnt match
The safety match was invented in 1844 by the swedish Gustaf Erik Pasch (1788-1862) and was improved by Johan Edvard Lundström (1815-1888).
Johan Edvard and his younger brother Carl Frans Lundström (1823-1917) started a large scale match industry in Jönköping (Sweden) around 1847, but the improved safety match was not introduced until around 1850-55.
In 1858 their company produced around 12 million match boxes.
