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Old 20th January 2006, 10:17 AM   #1
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Angry simple amplifier

hello i am new to this and my interst is t make one amplifier with power somethinc like 200w tops but i want this as simple and cheap is possible i could of course compromize with the sound quality but simple to make low cost is the original target ..... so far ive been playing trying to improve john tyrone simple amplifier ( easy to find ) but it proove to be very unstable and then looking at kemo kits electronics in germany there is a kit that looked nice a 2 tda 2030 briged boosted with 4 bd907 transistors so i thought about using all a bit bigger like tda 2050 plus bd 249-250 for the outpout.....any sugestions ????
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Old 21st January 2006, 05:22 PM   #2
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Default Re: simple amplifier

Quote:
Originally posted by sakis
hello i am new to this and my interst is t make one amplifier with power somethinc like 200w tops but i want this as simple and cheap is possible i could of course compromize with the sound quality but simple to make low cost is the original target ....
My suggestion would be to back off on the power * a lot* and use the savings to build a higher quality amp.
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Old 21st January 2006, 08:24 PM   #3
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Hello, sakis

It is a lot of problems, money and difficulties building a high power audio amplifier.
I would not want to do this.

If you look here in Solid State forum, in Chip Amps forum and even in Pass Labs forum,
you will see most members have built 'only 25 - 60 Watt' amplifiers.
And they are very happy!
Plays nice music and makes their loudspeakers scream loud and high volume.

If you do not need 200 Watt for something special, like discotheque,
I think it is better you check out some of these many nice projects.

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Old 25th January 2006, 09:41 AM   #4
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Default 200w

no .... for this application the power of about 200 w is needed ..... also soa is needed like nobody is going to want to exceed this power but at least it has to be stable ....... stk 40xx could one option but for this project i think something a litle bit more cheaper could do .....no matter if it sounds worst ....

thanks sakis
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Old 25th January 2006, 01:48 PM   #5
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http://www.diyaudio.com/forums/showt...551#post781551

Kalimera Saki,

Look here if you like. It has been built by several DIY Audio members already and the reports have been very good.

Quasi
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Old 25th January 2006, 01:48 PM   #6
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bridge parallel chip amps...
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Old 26th January 2006, 03:46 AM   #7
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Saki
"kemo kits electronics in germany there is a kit that looked nice a 2 tda 2030 briged boosted with 4 bd907 transistors so i thought about using all a bit bigger like tda 2050 plus bd 249-250 for the outpout.....any sugestions ????"

listen,a 200w amp is going to be expensive anyways, check out
these guys at www.delta-audio.com a beautiful hq amp kit for saki
and is not too expensive either

good luck
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Old 26th January 2006, 03:31 PM   #8
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Default main target cheap and simple

both of this schmatics sugested with the first look are very nice also i am shure that they perform brilliant BUT!!!! both of them are neither simle nor cheap to make .....

i trully thank you for your interest but for sure i need something more simple and cheaper
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Old 26th January 2006, 06:04 PM   #9
lineup is offline lineup  Sweden
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Default Re: main target cheap and simple

Quote:
Originally posted by sakis
both of this schmatics sugested with the first look are very nice also i am shure that they perform brilliant BUT!!!! both of them are neither simple nor cheap to make .....

I truly thank you for your interest but for sure i need something more simple and cheaper
If was possible to build good 200W amp simple and cheap everybody would do it.
(Why should we build 50 Watt, in this case?)

200 Watt amplifier which is simple and cheap, will not be good!
And probably not have 200Watt output!

Because is difficult to build 200 Watt.
You can not make it too simple.
You need VERY BIG transformer and heatsink.
And this is NOT cheap .....
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Old 26th January 2006, 10:40 PM   #10
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lineup's right. You won't build a high quality 200W amp cheaply. I built a pair of 135W monobloc power amps last year, made my own PCBs, shopped around and got the best discounts on parts that I could. They still cost me about 500. The mains transformers, heatsinks and filter capacitors came to almost 200 alone. The power transistors were also expensive - 2 x MJL3281A on each regulator board and each power amp board @ 5.50 a piece. That's 44 just on the output devices.
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