Salas hotrodded blue DCB1 build - Page 175 - diyAudio
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Old 18th March 2012, 03:55 PM   #1741
Salas is online now Salas  Greece
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Quote:
Originally Posted by Siberia View Post
Tx secondaries: 16.60V; +16.72
-1.6; +0.9 is Dc offset on output.

Sorry, if it's counterintuive.
So you got about 21VDC in on the filter capacitors?
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Old 18th March 2012, 03:58 PM   #1742
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Salas, my voltage before rectification is 12.28V, and after the diode bridge the voltage is 13.50V DC
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Old 18th March 2012, 04:13 PM   #1743
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Quote:
Originally Posted by Salas View Post
So you got about 21VDC in on the filter capacitors?
I've got 20VDC in measured a minute ago under first capacitors.
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Old 18th March 2012, 04:33 PM   #1744
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Quote:
Originally Posted by rikkert1978 View Post
Salas, my voltage before rectification is 12.28V, and after the diode bridge the voltage is 13.50V DC
Better go for a 15+15VAC transformer when convinient.
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Old 18th March 2012, 04:34 PM   #1745
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Quote:
Originally Posted by Siberia View Post
I've got 20VDC in measured a minute ago under first capacitors.
Plenty.
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Old 18th March 2012, 05:21 PM   #1746
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Hi Salas,
Does the made/brand of PS cap make much difference in the hotrodded blue DCB1 design ? Doesn't the shunt reg shielded the buffer from ESR and ripples? I am think how expensive Caps like MUNDORF M-Lytic AG vs reasonable cap like Pana or CDE will make much different here? Any comment?

Thanks
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Old 18th March 2012, 06:00 PM   #1747
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In my experiments the CCS damped down the discretion between capacitors quality significantly than perceivable in raw supplies. Their impedance can still interfere to an extent though. Enough members maintain they can still subjectively pick several capacitor models out in their DCB1 builds. I would certainly advise a renowned good LowESR industrial capacitor like Panasonic or Nichicon for all the known reasons as a minimum.
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Old 18th March 2012, 07:12 PM   #1748
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Brought home borrowed from the neighbour AV receiver, same sound. This time it should be speaker related then.
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Old 18th March 2012, 07:16 PM   #1749
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Only the receiver no other line stage in the chain was the test? Polarity in speakers? Did some rewiring and could be out of phase between boxes?
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Old 18th March 2012, 07:30 PM   #1750
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Cd to receiver to Speakers. Crappy receiver, but I think it showed the same character of total lack of slam. I don't remember doing any rewiring, except changing a pair of rcas on the buffer, which seems to me, was wired in a same way as before

I've checked phasing with HI Fi news test LP. Sounds allright. It's uber weird that both speakers are showing same impotence.
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