It's basically the same as you did.
Day-night temperature difference at Curaçao is 4-5 degrees celsius.
Day temperature tomorrow will be 32C, with a 7mph wind speed.
Power amps inside would load hvac higher, or require to have aircon running.
But there's always wind on the island, and always blowing from the east, very little variation in the heading.
The solution is a modular power amp, as yours.
Front-end module inside the house, heatsink with output-stage outside, only requires a hole and sockets with the right terminals/connectors on both sides of the wall.
Additional plus is that the power amps need not be heat savers, but can be class A.
7mph wind speed is 3m/s, more than halves the C/W number of a heatsink with natural convection (~ 0.3 m/s)
The wind isn't always 7mph, can be multiple times that number, and it can turn hurricane grade.
So : folding and rotating heatsink modules, folded-in when not in use, rotating to adjust the angle to the incoming wind.
The hardware is cheap, 2 times a wall-mounted rotating/directional tv-antenna, but without the antenna
(my compliments for your creativity, Sergiu)
Day-night temperature difference at Curaçao is 4-5 degrees celsius.
Day temperature tomorrow will be 32C, with a 7mph wind speed.
Power amps inside would load hvac higher, or require to have aircon running.
But there's always wind on the island, and always blowing from the east, very little variation in the heading.
The solution is a modular power amp, as yours.
Front-end module inside the house, heatsink with output-stage outside, only requires a hole and sockets with the right terminals/connectors on both sides of the wall.
Additional plus is that the power amps need not be heat savers, but can be class A.
7mph wind speed is 3m/s, more than halves the C/W number of a heatsink with natural convection (~ 0.3 m/s)
The wind isn't always 7mph, can be multiple times that number, and it can turn hurricane grade.
So : folding and rotating heatsink modules, folded-in when not in use, rotating to adjust the angle to the incoming wind.
The hardware is cheap, 2 times a wall-mounted rotating/directional tv-antenna, but without the antenna
(my compliments for your creativity, Sergiu)
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CFA headphone amplifier using JFET input (2SK246 and 2SJ103). It inspired by RN Marsh design (a thread here although I did know the exact circuit).
My jfet model in simulation seem not good enough. Some value determine empirically. Now, I use it as pre-amp. It sound very good.
Next time I will try to drive headphone.
My jfet model in simulation seem not good enough. Some value determine empirically. Now, I use it as pre-amp. It sound very good.
Next time I will try to drive headphone.
Attachments
As one would expect I guess.
It is an old-school single supply / current feedback design based on a singleton input stage, a bootstrapped VAS, high HFE drivers and power transistors.
all resistors are 1W metal oxide resistors.
all bipolar caps are Wima / Monacor.
All electrolytic's are Fischer & Tausche
only the transformer is 40 years old
transistors:
singleton: BC204B
VAS: BC207B
drivers: BD137-16 / 138-16
powers: BD441 / 442
It is an old-school single supply / current feedback design based on a singleton input stage, a bootstrapped VAS, high HFE drivers and power transistors.
all resistors are 1W metal oxide resistors.
all bipolar caps are Wima / Monacor.
All electrolytic's are Fischer & Tausche
only the transformer is 40 years old
transistors:
singleton: BC204B
VAS: BC207B
drivers: BD137-16 / 138-16
powers: BD441 / 442
I drawed output, digital part don't want to draw, cause it's standart for DiR9001 and AD1853.
Attachments
Why can't people just resize to a 1024 X 768 JPG ?
Had to scroll forever to view over-sized pictures.
If they are attached to the bottom , you can view what you want while
still being able to view the thread as a whole.
OS
If you reset the page the forum will often fix it.
I know ... logged on - it is semi-acceptable.
But , without logging on .... just bloated photo's that overwhelm
the monitor. (on a 1440p sxga).
You would have to have a qxga or wqxga to view those natively.
Just makes things harder....get some photo software.
On my last ISP those photo's would of taken 20 seconds to load.
OS
But , without logging on .... just bloated photo's that overwhelm
the monitor. (on a 1440p sxga).
You would have to have a qxga or wqxga to view those natively.
Just makes things harder....get some photo software.
On my last ISP those photo's would of taken 20 seconds to load.
OS
Why can't people just resize to a 1024 X 768 JPG ?
Had to scroll forever to view over-sized pictures.
If they are attached to the bottom , you can view what you want while
still being able to view the thread as a whole.
OS
hi
I'm sorry I do not know how to resize photos in my web page.
please help me
hi
I'm sorry I do not know how to resize photos in my web page.
please help me
Get a free image program -
PhotoScape : Free Photo Editing Software (Photo Editor) Download
(open source)
Edit like below - I tested photoscape , don't install the
google toolbar.
Photoscape seems to be a beginners version of my paint shop pro.
GUI is "what do you want to do -visual !! Cool.
OS
