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Old 16th August 2013, 03:16 PM   #51
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Erlend Sæterdal View Post
You need to pay attention to the following.

L7 needs more than 500 grams of aluminum radiator. And the installation of insulation.

Do not change the original parts.

L7 matching parts is very stable. And the strict test.
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Old 16th August 2013, 03:18 PM   #52
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by rade95 View Post
Woow, thanks for heads up. I built one channel but have not tested it yet since I still don't have a PS. Did you place transistors and FETs exactly as printed on the PCB? It really sucks we don't have a complete circuit.
PCB the above detailed numerical. I never watch circuit installation.

I think watching circuit is really a thing too much trouble. Or PCB directly
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Old 16th August 2013, 03:21 PM   #53
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Erlend Sæterdal View Post
Everything was done right. It played fantastic for a while and suddenly .......... The speakers used is impossible too repair. So the owner is very sorry. Do not use more than 36 vdc I think.


Maybe you should check your radiator.

One method I often use. The power input.

110V or 220V end, connected in series with a light bulb.

It can effectively prevent circuit burned. The reason there is enough time to examine the problem.

L7 can use the voltage in the + -70V. The premise is that it requires 1KG aluminum radiator.
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Old 28th February 2014, 12:41 AM   #54
Pemo is offline Pemo  Mexico
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Location: Echegaray, Naucalpan, Estado de México
I like them very much. I've already build the gainclone and I can say it's a very good amplifier. Now tell me please between L7 and L15 mosfet which one do you (LJM_LJM) prefere?
Thanks and RGDS.
PEMO
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Old 28th February 2014, 12:42 AM   #55
Pemo is offline Pemo  Mexico
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Location: Echegaray, Naucalpan, Estado de México
Oh by the way. Is it possible to buy directly from Taobao and ship to Mexico?

RGDS
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Old 4th March 2014, 12:39 PM   #56
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by Pemo View Post
I like them very much. I've already build the gainclone and I can say it's a very good amplifier. Now tell me please between L7 and L15 mosfet which one do you (LJM_LJM) prefere?
Thanks and RGDS.
PEMO
Do you want to ask about the L15 how to choose?


They are very good. The principal is a different volume.

If you want to make a small machine used just about


I can send DHL. But the postage to call ask.
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Old 14th March 2014, 10:34 AM   #57
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Hello. I purchased your amplifier L7.Tested it with +_ 60 v.Sound good.But there is a question.Test whether it is in dual-channel variant powered by a single transformer?When I connect the two modules to the source, there is a significant noise in the speakers.And another question. Quiescent current 120mA the norm for your amplifier? Transistors apparently you used the "CC5551" and not "2N5551"?With respect!CC5551 datasheet, CC5551 datasheets, CC5551 datenblatt, CC5551 manual, CC5551 data sheets, CC5551 pdf - ALLDATASHEET.COM
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Old 14th March 2014, 10:47 AM   #58
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Hello Ljm_ Ljm! Bought your amplifier. Tested with power +-60v. The sound is good! But there is a question. Test whether the amplifier in the dual-channel variant powered by a single transformer? I if you connect a second channel to the sound source, there is a significant noise in the speakers.And more! In your amplifier so I figured used transistors "CC5551" replacing "2N5551"?With respect!
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Old 15th March 2014, 03:13 AM   #59
ljm_ljm is offline ljm_ljm  China
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Quote:
Originally Posted by kukutsapol View Post
Hello Ljm_ Ljm! Bought your amplifier. Tested with power +-60v. The sound is good! But there is a question. Test whether the amplifier in the dual-channel variant powered by a single transformer? I if you connect a second channel to the sound source, there is a significant noise in the speakers.And more! In your amplifier so I figured used transistors "CC5551" replacing "2N5551"?With respect!
Just about to connect to other amplifier. A transformer, the use of a power board.

If it is two transformer, then use two power panel.

Must be the same number. And does not require any earthed alone.

It USES CC5551. Can not use 2 n5551
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Old 15th March 2014, 06:36 AM   #60
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what about idle current and regulation ?
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