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Post by jj2106 on Apr 11, 2018 12:29:32 GMT -5
Hi,
Does anybody know the size (in µF) of the capacitors used in the A-300 power supply?
Thanks a bunch
J-J
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Post by vcautokid on Apr 12, 2018 2:58:28 GMT -5
Based on the image I see if you are speaking of the Main Linear Power Supply I see 40,000 micro-farads of capacitance. 4 x 10,000 respectively.
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Post by jj2106 on Apr 12, 2018 4:34:49 GMT -5
Tank you very much!
J-J
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Post by pedrocols on Apr 12, 2018 8:10:01 GMT -5
I think it also depends if they are wired in series or parallel.
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Post by jj2106 on Apr 12, 2018 8:24:08 GMT -5
It does indeed, but I bet they are in parallel.
And 40,000µF is generous for 2x150W.
Good news
J-J
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KeithL
Administrator 
Posts: 10,261
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Post by KeithL on Apr 12, 2018 8:28:18 GMT -5
A reasonable answer would be "enough to get the job done... well... so why ask?"
However, since it's no big secret....
Like virtually all modern Class A/B amps, the A-300 runs on plus and minus power rails (around +50V and -50V).
Each rail has 2 x 10,000 uF capacitors in parallel (capacitors add in parallel - so that's 20,000 uF on each rail).
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Post by jj2106 on Apr 13, 2018 2:56:10 GMT -5
Well, Keith, why not ask?
The available capacitance is one key factor behind the musical quality of an amp.
I'm glad to see that Emo has been generous on that front.
I 'm also glad to see that the A-300 will not clip before it reaches its nominal power (50^2/2*8=156.25)
Thank you anyway for yor answer.
J-J
PS: if you were also kind enough to answer my other thread about A-100 line outs, this would be very much appreciated.
Thanks again
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