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Old 22nd November 2012, 07:56 AM   #911
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Quote:
Originally Posted by nuwan View Post
sir DAMANHURI
as sir APEX told cloud you post you're new PCB with 9 pair power trans PA
power amp details in 500W PA amplifier with Limiter, plz

thanks
nuwan
Please Chek
500W PA amplifier with Limiter

This Page About Studio Reference Amplifier
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Old 22nd November 2012, 03:10 PM   #912
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Originally Posted by Junie View Post
Is it possible to change the solder pads of Q7 and Q8 and make the same size of Q9 solder pads?
You've been asking Alex the same quastion before... I can only give you the same answer... it is not enough place in that area, unfortunately.
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Old 30th November 2012, 06:27 PM   #913
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SR200 with protect on pcb, not my work.
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Old 30th November 2012, 06:34 PM   #914
44250 is offline 44250  Serbia
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Quote:
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SR200 with protect on pcb, not my work.
G R E A T ! ! !
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Old 30th November 2012, 08:14 PM   #915
alex mm is offline alex mm  Romania
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......nice but dual layer , could be done only in factory , not so easy for diy
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Old 1st December 2012, 05:17 AM   #916
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if I use +/-70vfor SR200 how watts at 4ohm I can get
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Old 1st December 2012, 09:09 AM   #917
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Originally Posted by alex mm View Post
......nice but dual layer , could be done only in factory , not so easy for diy
I'm sure you could done this on single layer
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Old 1st December 2012, 09:12 AM   #918
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Originally Posted by shravanth View Post
if I use +/-70vfor SR200 how watts at 4ohm I can get
Abot 300 watts at 4 ohm.
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Old 1st December 2012, 11:45 AM   #919
AndrewT is offline AndrewT  Scotland
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I can get over 300W into 4ohms (actually 35.3Vac into 4r0) from a 40+40Vac transformer that gave +-58.5Vdc at the PSU output.

Why only 300W when using a FET output stage and +-70Vdc for the supply?
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Old 1st December 2012, 12:23 PM   #920
Vostro is offline Vostro  South Africa
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Originally Posted by AndrewT View Post
Why only 300W when using a FET output stage and +-70Vdc for the supply?
I thought SR200 used 2SC5200 BJT as output, not mosfets,
as you said many times bad SOA at 70V, so guess not much current available into 4R.

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Originally Posted by apexaudio View Post
I'm sure you could done this on single layer
Regards
+1, Ive tried to do my own pcbs and I must say, I look at Mr Alex_MM pcbs for hints all the time, I've learned so much just from looking at his diy style boards.

Thanks Alex_MM.

and great contributions from Mr Apexaudio
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