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Chip Amps Amplifiers based on integrated circuits

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Old 16th April 2010, 03:05 PM   #1401
troystg is offline troystg  United States
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osscar-

That is actually pretty neat, certainly not safe, but neat.

It gives me some ideas for REALLY cheap builds for friends. I usually make and give away several chip amps but the cost of the enclosure is generally the limiting factor. This opens all sorts of possibilities.. And the recipients would probably think it's cool to "see" the parts. Of course I have to make it idiot proof. Even though they are making better idiots every year... :-)
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Old 16th April 2010, 03:10 PM   #1402
osscar is online now osscar  Latvia
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Yes - its built- as a design element I tried to create it safe-shrinking tubes everywhere + gourmets etc.
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Old 16th April 2010, 03:22 PM   #1403
AndrewT is offline AndrewT  Scotland
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Post 1398.
What type of transformer is that?
The rounded corners seem quite unusual!
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Old 16th April 2010, 03:28 PM   #1404
osscar is online now osscar  Latvia
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тпп 287-220-50К Old soviet transformer with primary 220V and six secondaries -
2x2,63V 2x5V 2x10 V - actual readings 2x16VAC in series.
90VA total.
There is also version where whole transformer was immersed in green paint .
This transformer is very quit - no buzz or hum like from cheap toroid.
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Old 21st April 2010, 03:47 PM   #1405
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Hi to ALL!
It is my new project of the 20W/4 Ohm or 10W/8 Ohm Class "A" amplifier on integrated microcircuits with 41 pieces BUF634T in each channel, included in parallel.
The amplifier works some months, but cases while is not present. Now the case is made at factory under my drawings. I wait for the termination of works.
Sounding was pleasant to all who came to me and listened

Photo of the amplifier I apply.
Other files:
- Circuit of Amp
- Computer model of case
- Impulse signal 1 kHz
- Impulse signal 10 kHz
- Impulse signal 20 kHz
- Sin 5 Mhz
Attached Images
File Type: jpg Without cooling radiators1.jpg (98.9 KB, 2159 views)
File Type: jpg Condition for today1.jpg (96.8 KB, 2113 views)
File Type: jpg Circuitry.JPG (119.1 KB, 2060 views)
File Type: jpg Case assembly drawing.jpg (63.9 KB, 2003 views)
File Type: jpg General.jpg (43.7 KB, 1932 views)
File Type: jpg Impulse 1kHz1.jpg (55.9 KB, 534 views)
File Type: jpg Impulse 10 kHz1.jpg (78.0 KB, 257 views)
File Type: jpg Impulse 20 kHz1.jpg (80.4 KB, 274 views)
File Type: jpg Sin 5 MHz1.jpg (79.1 KB, 271 views)
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Old 22nd April 2010, 07:46 PM   #1406
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Original idea. Should R108 not connect to the other side of R107?
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Old 23rd April 2010, 02:00 AM   #1407
okkyn is offline okkyn  Singapore
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What an art of engineering Prophetmaster! You even manage to put resistors between heatsink's fins
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Old 23rd April 2010, 05:53 AM   #1408
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Quote:
Originally Posted by pacificblue View Post
Original idea. Should R108 not connect to the other side of R107?
Thanks!
Can be and so, but I consider that this R-C should be from outside a loudspeaker.
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Old 23rd April 2010, 06:47 AM   #1409
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Quote:
Originally Posted by okkyn View Post
What an art of engineering Prophetmaster! You even manage to put resistors between heatsink's fins
Thanks for an appreciation.
Radiators are lifted over the circuit board on 5 mm and resistors are under cooling radiators
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Old 27th April 2010, 10:27 PM   #1410
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JFet Buffered Gain Clone. This is my first GC.

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