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Old 19th May 2012, 07:07 PM   #11
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Old 19th May 2012, 07:33 PM   #12
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Quote:
Originally Posted by andrewlebon View Post
Hi
greetings can anyone share complete schematics of ADVANCE TIMES RF802 amplifier made in brazil
warm regards
andrew lebon
Could it be this one? Advance RF802 Schematic | DIYstash
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Old 19th May 2012, 09:17 PM   #13
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Old 19th May 2012, 09:21 PM   #14
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plz linggis, apane sing di linggis, kang? Wkwkwk
Please reread forum rules. Posts must be in English.
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Old 20th May 2012, 12:17 AM   #15
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"offcouse if your speaker is 2ohm it will be nearly 1,5kw."

Of course it cannot be.

If the amplifier was 100% efficient with a fully regulated supply, 1.5KW/2Ω would require 54.77V RMS, or 77.447V peak.

This would seem a bit hard to get from 77V rails, the loss in the emitter resistors alone would be about 2V.


I don't like the 100V rated TIP 41C/42C parts, other than that I don't see a problem delivering 750W/2R with a very stiff supply.

An Adcom GFA 555 runs on the same kind of voltage but because of its small anemic supply only drives 450W/2Ω. This anemic supply is over 1KVA with a 50% duty cycle.
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Old 20th May 2012, 12:39 AM   #16
JTscore is offline JTscore  Indonesia
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I prefer driving a compact amplifier, such as using ic opamp, assuming the amplifier needs to be modified, what needs to be on the fox, the results are not much different from the original .. thank you
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Old 20th May 2012, 01:11 AM   #17
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Hi Djk
greetings you have any high power ab class schematics to share i know HCLASS
and D class are in vogue now but sound quality of ab class is better whats your views
since you are proffessional guy for me its just diy nothing more surely 1000 watts and above in ab class can be made if correct schematic is there please can you help
warm regards
andrew lebon
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Old 20th May 2012, 04:13 AM   #18
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Why don't you just build a Crown MA2400 with some extra outputs?

The schematics are on line at Crown.

Discontinued Amplifier Products
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Old 20th May 2012, 05:00 AM   #19
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Original from Indonesia.....I've tried it. it's good amp...
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Old 20th May 2012, 05:21 AM   #20
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Hi Jidahgan
greetings nice to hear its good amp can you post some pics and contribute
some construction tips it would be of help to anyone wanting to make this amp since
it has easy to get parts
warm regards
andrew lebon
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