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Old 2nd November 2012, 02:53 AM   #861
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Quote:
Originally Posted by Arif Budiyanto View Post
Mr. Mile S...
Absolutely right...
Last night I replaced those two zener diodes, install back 2k2 resistor and check the diodes...Finally I got 15Volt on those ones...Thank you so much..
For the first run I set 1V on R10 (instead of fuse)...
Dc offset measured at 24mv...it is a little bit high, isn't it?...But I have not test the sound yet, it was too late of night....
I will try to take pictures and post them in this forum...
Thank you so much Mr. Mile S. for sharing this SR200 design...
Best Regards...
Arif
Offset 24mV for DC amplifier is very good.
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Old 2nd November 2012, 12:11 PM   #862
44250 is offline 44250  Serbia
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it is all right,maybe it could be even better if you match input pair of the transistors as close as it is possible-try if you can.
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Old 3rd November 2012, 03:49 AM   #863
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Originally Posted by 44250 View Post
it is all right,maybe it could be even better if you match input pair of the transistors as close as it is possible-try if you can.
Thank you so much for your very kind attention...I will try to get more input pair transistors...
Best Regards.
Arif
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Old 7th November 2012, 06:23 PM   #864
nuwan is offline nuwan  Sri Lanka
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Originally Posted by 44250 View Post
it is all right,maybe it could be even better if you match input pair of the transistors as close as it is possible-try if you can.
sir
i have seen meany amplifiers schematic of your's publish in DIY audio.sir plz help me to select one of you'rs power amp schematic good for drive stage monitor.
thanks
nuwan
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Old 8th November 2012, 12:31 AM   #865
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Originally Posted by nuwan View Post
sir
i have seen meany amplifiers schematic of your's publish in DIY audio.sir plz help me to select one of you'rs power amp schematic good for drive stage monitor.
thanks
nuwan
What is power of your stage monitors? I suggest SR200, B500, HV23 or H900 for powerfull stage monitors with 15 inch woofer.
Regards
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Old 8th November 2012, 08:45 AM   #866
nuwan is offline nuwan  Sri Lanka
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Originally Posted by apexaudio View Post
What is power of your stage monitors? I suggest SR200, B500, HV23 or H900 for powerfull stage monitors with 15 inch woofer.
Regards
sir
thank you for you'r reply.thank you
i will attach PDf file my speaker selection for now 2 way stage monitor. sir what is the differences bet win DIY power AMP & comarshal pro audio power amp what are the basic pacification on PRO amp good for drive bass bin, Low MId Mid high, high high or full range.
thanks
nuwan
Attached Files
File Type: pdf IMF-HP15W2.pdf (338.6 KB, 303 views)
File Type: pdf PHT-415.pdf (246.0 KB, 183 views)
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Old 8th November 2012, 10:25 AM   #867
AndrewT is offline AndrewT  Scotland
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You want a speaker design for the drivers from us and then use that to allow a suggestion for a suitable amplifier.
You ask too much.
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regards Andrew T.
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Old 8th November 2012, 06:57 PM   #868
nuwan is offline nuwan  Sri Lanka
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Originally Posted by AndrewT View Post
You want a speaker design for the drivers from us and then use that to allow a suggestion for a suitable amplifier.
You ask too much.
sir
don't mis understand me.i just want to show the speaker i am go in to select for my next stage monitor project.i am new to diy i don't know much, that's way i post speaker pacification file. sir apex or any one who know abut this thing can help me. i all ready made pair of folded horn & bubble top's for my friend we don't have heavy gig. we are in tight budget. i will post some of pic speaker cabinet we made. i did not disaign cabinet drawings. this is just for fun & practice for our boys.

sorry for my bad English
thanks
nuwan
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File Type: jpg IMG00215.jpg (480.4 KB, 608 views)
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Old 8th November 2012, 07:19 PM   #869
nuwan is offline nuwan  Sri Lanka
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Quote:
Originally Posted by nuwan View Post
sir
thank you for you'r reply.thank you
i will attach PDf file my speaker selection for now 2 way stage monitor. sir what is the differences bet win DIY power AMP & comarshal pro audio power amp if we want to by bran new power amp what are the basic considering pacification on PRO amp good for drive bass bin, Low MId Mid high, high high or full range.
thanks
nuwan

Last edited by nuwan; 8th November 2012 at 07:25 PM.
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Old 9th November 2012, 05:21 PM   #870
44250 is offline 44250  Serbia
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what power and impedance rating are those speakers that you have? HV23 and HV350 will give you 240W/8r 350/4r and they would be just fine for monitors(midbas-middle-high) and APEX 50-500W is simple,relatively cheap and very good amplifier for full range-so for woofer it would be great. HV23 and HV350 are ab-class amplifiers and for full stereo power you will need good psu with 1kVA transformer,2 x 10000uf of capacitors at least,and heatsinks with fan cooling:than you will have a beast of an amplifier.
APEX 50-500W is b-class amplifier so it is not heating that much,but it still needs a proper heatsink(s), at least 1,3kVA transformer with about 2x 15000uF of capacitors.
The diference between diy and commercial amp? DIY if proper done (no sparing on transformer and capacitors in psu,heatsinks...) comes more expencive option but because of that it does not "lose its breadth" at peak of its power like most commercial does. If done properly,diy can compeete with even more expencive amplifiers. That is my opinion...
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