L-20 200w class b amp

ljm_ljm · 8th December 2009, 01:47 AM

this is my design amp.
it is 200W OUTPUT。
voltage + -70V

djk · 10th December 2009, 10:41 AM

Your effort looks very nice.

How hard are you going to use it?

Adcom had good success with their 60W rated 535 and 100W rated 545. They used the same circuit board for both models, just more heatsink and more outputs. The 535 had a 3.5" tall heatsink and two pair of plastic outputs. The 545 had a 5.25" tall heatsink and three pair of plastic outputs.

The 200W rated 555 went to four pair of metal cased outputs with 7" tall heatsinks.

ljm_ljm · 10th December 2009, 01:07 PM

yes 。
i will use it .
this is a CLASS b amp.itis efficiency is 65%.

yangbaibing · 10th December 2009, 02:17 PM

You should provide more infomation about the L20.Such as 18V/us and so on.

ljm_ljm · 3rd October 2011, 02:21 PM

Please note that only L20 blue is correct. The original provider.

It will indicate the DESIG LJM.

Homl · 3rd October 2011, 03:04 PM

Interesting amp.
Can you please post a schematic of the latest version of the L20? Thanks.

10th December 2009, 10:41 AM	#2
djk diyAudio Member Join Date: Feb 2001 Location: USA	Your effort looks very nice. How hard are you going to use it? Adcom had good success with their 60W rated 535 and 100W rated 545. They used the same circuit board for both models, just more heatsink and more outputs. The 535 had a 3.5" tall heatsink and two pair of plastic outputs. The 545 had a 5.25" tall heatsink and three pair of plastic outputs. The 200W rated 555 went to four pair of metal cased outputs with 7" tall heatsinks. __________________ Candidates for the Darwin Award should not read this author.

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10th December 2009, 01:07 PM	#3
ljm_ljm diyAudio Member Join Date: Sep 2006	yes 。 i will use it . this is a CLASS b amp.itis efficiency is 65%.

10th December 2009, 02:17 PM	#4
yangbaibing diyAudio Member Join Date: Dec 2009 Location: chengdu china	You should provide more infomation about the L20.Such as 18V/us and so on.

3rd October 2011, 02:21 PM	#5
ljm_ljm diyAudio Member Join Date: Sep 2006	Please note that only L20 blue is correct. The original provider. It will indicate the DESIG LJM.

3rd October 2011, 03:04 PM	#6
Homl diyAudio Member Join Date: Nov 2003	Interesting amp. Can you please post a schematic of the latest version of the L20? Thanks.

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