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5th June 2010, 11:35 AM
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#1 |
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diyAudio Member
Join Date: Feb 2009
Location: Lisbon
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Anyone upgraded a 740A Cambridge Audio ?
Anyone upgraded a 740A Cambridge Audio ? i have a 740A and an Arcam Delta 290 , in terms of power the Arcam is more powerfull than the Cambridge , even though the Cambridge has 25W more...
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1st April 2011, 12:05 PM
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#2 |
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diyAudio Member
Join Date: Feb 2009
Location: Lisbon
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anyone ?
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8th April 2011, 12:28 PM
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#4 |
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diyAudio Member
Join Date: Feb 2009
Location: Lisbon
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anyone ?
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8th April 2011, 12:33 PM
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#5 |
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diyAudio Member
Join Date: May 2006
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Do you have the service manual and schematic for it ??? By looking at it a couple of us could make some suggestions.
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8th April 2011, 04:01 PM
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#6 |
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diyAudio Member
Join Date: Apr 2004
Location: Norwich, UK
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Knowing Cambridge, the power supply capacitors are undersized rubbish. Another problem however is poor heatsinking, so while upgrading the supply capacitance might help, it'll probably cause the amp to die when the power supply will no longer sag quite so much to protect the outputs from overheating
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9th April 2011, 12:09 PM
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#7 |
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diyAudio Member
Join Date: Mar 2003
Location: Searchin' for Sweet Singletrack
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This German company seems to offer mods - mostly component changes it would seem:
hoer-wege Modifikation für CAMBRIDGE AUDIO azur Verstärker 740A From the pics and my experience the more upmarket CAs are well designed and built. Heat in the o/p stage is much more related to load impedance and output level than a bit less voltage sag on the supply rails. I suspect the CA has a protection thermistor anyway. |
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