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Old 27th February 2009, 10:11 PM   #1
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Default Arcam Delta 290

Im trying to fix my old Arcam Delta 290 Amp. Can anyone send me the service manual or schematics ? my email is : luis73@netcabo.pt

Thanks !!
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Old 27th February 2009, 11:45 PM   #2
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Hi lduarte1973,

Please, check your mail.
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Old 28th February 2009, 10:06 AM   #3
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Default Arcam delta 290

hi aparatusonitus , many thanks for such fast reply !!!
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Old 7th October 2013, 10:21 AM   #4
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Hi
I don't want to start a new thread so pardon.

I have old Arcam delta 290 Power amp.
I do not use it currently and was planning to sell, but I have an idea of tweaking it a bit with newer parts and see if any change to the sound occurred.
Can I ask members of this forum is there any particular component upgrade or swap for new one would bring benefit of improved sound ?

I have attached service manual and few pictures (big) @ dropbox .

https://www.dropbox.com/s/sdxhmww71q2ire1/IMGP2610.JPG

https://www.dropbox.com/s/op053pji9jgekd1/IMGP2612.JPG

https://www.dropbox.com/s/7qw7wp415uc6sz6/IMGP2616.JPG

Service manual

Thank you
Attached Files
File Type: pdf user-manual-ARCAM-DELTA 290-E.pdf (83.8 KB, 36 views)
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Last edited by voxxonline; 7th October 2013 at 10:25 AM.
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Old 7th October 2013, 10:41 AM   #5
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replace the 2 big capacitors with 12000mf 63v will give more power and better bass , i didnt do anything else
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Old 7th October 2013, 10:46 AM   #6
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sure. 12000 to 15000 would make a difference.
what about those caps on speaker output tabs ?
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Old 7th October 2013, 10:53 AM   #7
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should bring some improvement , i use mine as mid-bass amp only (85-800hz) and im satisfied thats why i didnt go any further .
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Old 7th October 2013, 11:22 AM   #8
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Has anybody got more ideas what to do ?
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Old 7th October 2013, 12:02 PM   #9
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you can always replace the ne5332 opamps but dont expect major improvement
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Old 7th October 2013, 12:04 PM   #10
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As I can't see the schematic I'm shooting off the hip a bit here.

Most of the Arcams were Class A/B Mos-Fet designs with single complimentary P-Type + N-Type outputs.

These can generally be improved upon by 1). Increasing the solidity of the PSU which has been discussed above and 2). Doubling up the output devices which improves the damping factor and the output impedance.
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