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Old 18th August 2010, 11:44 PM   #161
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Quote:
Originally Posted by shreya View Post
can i use BU407 instead of MJE340
For VAS use 2SB649/2SD669 instead MJE340/MJE350 or
2N3440/2N5415, MPSU10/MPSU60 (not same pin out as MJE or 2SA/2SC)

For drivers you can use 2SA968/2SC2238 instead MJE15031/MJE15030
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Old 22nd August 2010, 03:59 PM   #162
comasus is offline comasus  India
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Your amplifier is getting more distortion.

i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.

why its happening like this?????

I am waiting for your suggestions
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Old 22nd August 2010, 04:51 PM   #163
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Quote:
Originally Posted by comasus View Post
Your amplifier is getting more distortion.

i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.

why its happening like this?????

I am waiting for your suggestions
What is kind of distortion, can you describe? Do you measurment DC offset? For start you must have 0,6V on resistors 270R and 56R in CCS.
Can you post some photos?

Last edited by apexaudio; 22nd August 2010 at 05:02 PM.
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Old 22nd August 2010, 05:59 PM   #164
wahab is offline wahab  Algeria
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Quote:
Originally Posted by comasus View Post
Your amplifier is getting more distortion.

i have used BF871/2 instead of MJE340/350 and for drivers BD243C/BD244C
i have used only one pair of 2N3773
sound quality is too poor that we could not hear for long time as we get irritated to it.

why its happening like this?????

I am waiting for your suggestions
http://www.diyaudio.com/forums/solid...ml#post2272562
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Old 22nd August 2010, 06:28 PM   #165
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Wahab, go to post #129
http://www.diyaudio.com/forums/solid...giners-13.html
Regards
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Old 24th August 2010, 10:22 AM   #166
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I find paper with circuit of this amplifier with single pair 2N3773 and added VI limiter.
Attached Images
File Type: jpg P8240055.JPG (698.3 KB, 1206 views)
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Old 24th August 2010, 10:33 AM   #167
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PCB design of BOS100 can be use for some new amps...
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Old 24th August 2010, 10:50 AM   #168
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Smile prefer the cooked fish

Quote:
Originally Posted by apexaudio View Post
Fisherman told me fishing isn't cost effective hoby, better buy fish
I prefer the cooked one in the restaurant, much more easier!

Best regard

Albert
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Old 24th August 2010, 11:07 AM   #169
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Quote:
Originally Posted by echobase View Post
I prefer the cooked one in the restaurant, much more easier!

Best regard

Albert
Me too, but some people just love to fishing and evan don't like eat the fish :-)
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Old 29th August 2010, 10:52 AM   #170
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Smile Please do help kind Sir

Quote:
Originally Posted by apexaudio View Post
I find paper with circuit of this amplifier with single pair 2N3773 and added VI limiter.
Do you have schematic for that? I can't figure out the diodes and some of the transistors! Please do help kind Sir!

Best regard
Albert B.
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